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MM6900/MM7000 GSM Dual-Band Data Modem with Integrated GPS
Application Notes
Published by Maxon Sewon Europe Ltd Maxon House Maxted Close Hemel Hempstead Herts HP2 7EG United Kingdom Tel: +44 1442 267777 Fax: +44 1442 215515 e-mail [email protected] Internet: www.maxon.co.uk
Any queries regarding information in this manual, please contact the Technical Services Group Leader at the above address. Information provided in this document is believed correct at time of printing but is subject to change without notice. Maxon will not accept liability for any loss, damage or costs howsoever caused as a result of the information provided.
MM6900/7000 Dual Band GSM Data Modem with integrated GPS
WARNINGS Never operate the modem without the correct Maxon antenna, or a suitable artificial load, connected. Never modify a modem, or accessory, except as instructed by Maxon in a formal communication as this may invalidate any warranty, guarantee or type approval. Do not operate this equipment in environments containing explosive materials or vapour. This includes Petrol service stations. This equipment should not be operated on an aircraft as the law forbids it. It also should not be operated in the vicinity of medical equipment. Internal components containing beryllium oxide are used in the equipment. Dust from this material is a health hazard if inhaled or allowed to come into contact with the skin. Great care must be taken when handling these components. They must not be broken or subjected to excessive heat.
Safety Information
Please adhere to the following installation and safety information at all times. Supply Voltage +9V minimum to +28V maximum
Current consumption @ 12V = < 500mA fit a 1A inline anti-surge fuse. @ 24V = < 250mA fit a 500mA inline anti-surge fuse. Note: The inline fuse should be placed in as close a proximity to the +ve battery terminal as possible.
THE RATINGS OF THESE FUSES SHOULD NOT BE EXCEEDED AT ANY TIME
If the MM6900/7000 is to be operated from a vehicle installation either a 12V or 24V vehicle battery should provide the recommended supply source. If another supply other than the vehicle battery is used, Maxon Europe Limited only recommend the use of the approved CA 6823 12V power supply unit. For any PLUGGABLE EQUIPMENT used in conjunction with the MM6900/7000, the mains socket-outlet must be installed as near to the equipment as possible. The mains outlet must not be obstructed and must be easily accessible at all times. If fitting the modem into a fixed installation (such as a vehicle for example), care must be taken in the routing of all cabling such that the cable insulation does not become damaged. Maxon recommend that where a vehicle manufacturer's procedure for installation does not exist then the radio equipment installers should refer to:MPT 1362 (Code of Practice for the installation of mobile radio in land based vehicles). The MM6900/7000 Dual Band Modem may contain a NiCd Battery. The following instructions should be adhered to at all times: There is a danger of explosion if the battery is incorrectly replaced or fitted. Only replace the battery with an identical type of battery or one recommended by the manufacturer. A qualified Technician, Engineer or Maxon Sewon Europe Service engineer should only carry this out. Dispose of battery as per the manufacturer's instructions. Do not dispose of in fire. Do not short circuit.
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TABLE OF CONTENTS
1
1.1 1.2 1.3 1.4 1.5
INTRODUCTION
Product Overview How this document is organised Recommended Procedures Support Summary
1
3 3 3 3 3
2
2.1 2.2 2.3 2.4
SPECIFICATIONS
Functional Specification (GSM/GPS MM7000) Technical Specifications - Internal GSM Modem(MM6854) Technical Specifications GPS (SGM5610) Technical Specifications MM6900/7000 package
5
7 8 9 10
3
SYSTEM APPLICATIONS
13
15 15 15
3.1 Applications 3.1.1 MM6900 3.1.2 MM7000
4
4.1
OPERATION
Introduction
17
17 17 17 18 18 18
4.2 Network Connection 4.2.1 Inserting the SIM card 4.3 4.4 4.5 Turning on the modem V.24 Interface Summary
5
AT COMMANDS
5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.1.6 5.1.7 5.1.8 5.1.9 5.1.10 +++ - Escape command A/ Re-execute last command ATA Manually answer an incoming call ATD Dial a telephone number ATDL ATE Command Echo ATH Hang up ATI - Identification ATO0 Return to transparent mode (switch from command to data mode). ATS0 Auto-answer mode Issue 1.3 08/02
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20 20 21 21 21 22 22 22 23 23
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5.1.11 5.1.12 5.1.13 5.1.14 5.1.15 5.1.16 5.1.17 5.1.18 5.1.19 5.1.20 5.1.21 5.1.22 5.1.23 5.1.24 5.1.25 5.1.26 5.1.27 5.1.28 5.1.29 5.1.30 5.1.31 5.1.32 5.1.33 5.1.34 5.1.35 5.1.36 5.1.37 5.1.38 5.1.39 5.1.40 5.1.41 5.1.42 5.1.43 5.1.44 5.1.45 5.1.46 5.1.47 5.1.48 5.1.49 5.1.50 5.1.51 5.1.52 5.1.53 5.1.54 5.1.55 5.1.56 5.1.57 5.1.58 5.1.59 5.1.60 5.1.61 5.1.62 5.1.63 5.1.64 5.1.65 5.1.66 5.1.67 5.1.68 5.1.69 Issue 1.3 08/02 ATS1 Display Number of rings ATS2- Escape character ATS3 Command line termination character ATS4 Line Feed character ATS5 Backspace character ATS6 Pause before blind dialling ATS7 Wait time for carrier ATS8 Wait time before dialling ATS10 Wait time before disconnection ATS12 Escape code guard time ATV Results code format ATX Defines CONNECT results code format ATZ Load user profile AT&C Data carrier detect options AT&D Data Terminal Ready options AT&F Restore default configuration AT&V Display Current Configuration AT&W Save Current Configuration AT+CBST Select bearer service type AT+CEER Displays why last call was disconnected AT+CGMI Request manufacturer identification AT+CGMM Request model identification AT+CGMR Request version identification AT+CGSN Request product serial number identification AT+CIMI Request International mobile subscriber identity AT+CLIP Calling Line Identification Presentation AT+CMEE Report Mobile Equipment Error AT+CMGD Delete SMS Messages AT+CMGF Select SMS Message Format AT+CMGL List SMS Messages AT+CMGR Read SMS Messages AT+CMGS Send SMS Messages AT+CMGW Write SMS Messages to Memory AT+CMSS Send SMS Messages from Storage AT+CNMI New SMS Message AT+COPS Operator Selection. AT+CPAS Phone activity status AT+CPIN Enter PIN and query blocks AT+CR Cellular Result Code for Outgoing Calls AT+CRC Cellular result code AT+CREG Network Registration AT+CRLP Radio Link Protocol parameters AT+CSCA Service centre address AT+CSCS Select TE character set AT+CSDH Show test mode parameters AT+CSMP Set text mode parameters AT+CSQ Signal quality AT+CSTA Select type of address AT+DR Data compression report AT+DS Data compression mode AT+FCLASS Select, read or test service class AT+FMI Report manufacturer ID AT+FMM Report module ID AT+FMR Report revision AT+GMI Get manufacturer ID AT+GMM Get manufacturer model ID AT+GMR Get manufacturer revision ID AT+GOI Request global object identification AT+GSN Request product serial number identification ME820066 : MM6900/7000 GSM Data Modem with GPS Page iii 23 24 24 24 25 25 25 25 26 26 26 27 27 27 28 28 29 29 30 31 31 31 31 32 32 32 33 33 33 34 34 35 35 36 37 38 38 39 39 40 41 42 42 43 43 43 44 44 45 45 46 46 46 46 47 47 47 47 48
MM6900/7000 Dual Band GSM Data Modem with integrated GPS
5.1.70 5.1.71 5.1.72 5.1.73 5.1.74 5.1.75 5.1.76 5.2 AT+ICF Character framing AT+IFC Local flow control AT+ILRR Display local report rate AT+IPR Set terminal equipment data rate +CME ERROR CMS ERROR S Register Summary Summary 48 49 49 50 51 52 52 53
6
6.1 6.2 6.3
DEBUGGING & INDICATOR LIGHTS
Indicator Lights - TechnoTrak Indicator Lights TrakM8 (Logging Version) Indicator Lights/Sounder TrakM8 (Gatso Version)
55
57 57 57
7
7.1 7.2 7.3 7.4 7.5
INSTALLATION
Introduction Wiring Details Antenna Installation Safety Information Fixing
59
61 61 63 64 65
8
APPENDICES
67
67 67 67 68 68 69 69 70 70 71 71 72 72 73 73 74 74 75 75 76 76 77 77 Issue 1.3 08/02
8.1 Setting up Windows Modem interface 8.1.1 Open up the Control Panel 8.1.2 Double click on the modem icon 8.1.3 Highlight the don't detect my modem box 8.1.4 Select the standard 19200 modem 8.1.5 Select the appropriate COM port 8.1.6 Set the location information 8.1.7 Finish Installation 8.1.8 Select Properties 8.1.9 Select Connection 8.1.10 Set Data Bits, Parity and Stop bits 8.1.11 Select Flow Control and Software (XON/XOFF) 8.1.12 RS-232 8.2 Setting up Hyper Terminal 8.2.1 Select Hyper Terminal from Programs Menu 8.2.2 Select Hyper Terminal 8.2.3 Select Properties 8.2.4 Set Port 8.2.5 Port Settings 8.2.6 Properties 8.2.7 ASCII settings 8.3 Setting up Win Fax Pro 8.3.1 Communication Setup ME820066 : MM6900/7000 GSM Data Modem with GPS Page iv
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8.3.2 8.4 Win Fax Pro Setup Accessories 77 79
9
GLOSSARY
81
LIST OF FIGURES
Figure 2-1 Block Diagram ............................................................................................................................... 7 Figure 4-1 Location of SIM card ................................................................................................................... 17 Figure 4-2 Installation of SIM card................................................................................................................ 18 Figure 7-1 - Fixing centres for MM-6854 modem ............................................................................................ 65 Figure 8-1 - ...................................................................................................................................................... 67 Figure 8-2 - ...................................................................................................................................................... 67 Figure 8-3 - ...................................................................................................................................................... 68 Figure 8-4 - ...................................................................................................................................................... 68 Figure 8-5 - ...................................................................................................................................................... 69 Figure 8-6 - ...................................................................................................................................................... 69 Figure 8-7 - ...................................................................................................................................................... 70 Figure 8-8 - ...................................................................................................................................................... 70 Figure 8-9 - ...................................................................................................................................................... 71 Figure 8-10 - .................................................................................................................................................... 71 Figure 8-11 - .................................................................................................................................................... 72 Figure 8-12 - .................................................................................................................................................... 73 Figure 8-13 - .................................................................................................................................................... 74 Figure 8-14 - .................................................................................................................................................... 74 Figure 8-15 - .................................................................................................................................................... 75 Figure 8-16 - .................................................................................................................................................... 75 Figure 8-17 - .................................................................................................................................................... 76 Figure 8-18 - .................................................................................................................................................... 76 Figure 8-19 - .................................................................................................................................................... 77 Figure 8-20 - .................................................................................................................................................... 78 Figure 8-21 .................................................................................................................................................... 78
LIST OF TABLES
Table 2-1 Pin Out for 9 way D-type socket................................................................................................... 10 Table 2-2 Pin Out for 25 way D-type socket................................................................................................. 11 Table 7-1 -..........................................................................................................Error! Bookmark not defined. Table 7-2 -........................................................................................................................................................ 61 Table 7-3 -........................................................................................................................................................ 62 Table 7-4 -........................................................................................................................................................ 62 Table 7-5 -........................................................................................................................................................ 63 Table 8-1 - Accessories ................................................................................................................................... 79
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1 INTRODUCTION
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1.1 Product Overview
This document provides Application information for the MM-6900/7000 GSM Dual-Band Data Modem with GPS. This first section provides a brief overview of the products. Further sections go into more detail on the various functions that are available and how they can be applied.
1.2 How this document is organised
Section 1 Brief overview of the modems. Section 2 Basic Specifications Section 3 Applications Section 4 Operation Section 5 AT Commands Section 6 Debugging and Indicator Lights Section 7 Installation Section 8 Appendices Section 9 Glossary
1.3 Recommended Procedures
1. Data / SMS SIM must be used.
1.4 Support
Should you have any queries regarding this manual, or the information within it, please contact: The Technical Support Group Maxon Europe Limited. Maxon House, Maxted Close Hemel Hempstead Hertfordshire HP2 7EG United Kingdom Telephone: +44 (0) 1442 267777 Fax: +44 (0) 1442 215515
Technical Support Direct Telephone Line: +44 (0) 1442 298988 Technical Support Direct Fax Line: +44 (0) 1442 242363 Internet: www.maxon.co.uk
1.5 Summary
This section has provided a basic introduction to the products.
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2 SPECIFICATIONS
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2.1 Functional Specification (GSM/GPS MM7000)
· · · · · · · · ·
·
Completely self contained in a single robust housing Separate or Combined GSM/GPS antenna's Dual Band GSM (900MHz/1800MHz) Application specific software platform 5 protected digital input lines Low power mode with wakeup via any of the 5 inputs or serial activity the external RS232 serial port 2 switched outputs External RS232 interface, software programmable to allow control of external peripheral equipment Tri-colour LED, software controlled Voice option with software controlled external speaker mute.
Block Diagram
5 9 W a y D W Y
5 W Y 11 WY
Maxon Modem
30 Way
JTAG
11 WY 1 1 W Y 1 1 W Y
30 Way
Maxon Motherbrd
2 5 W a y D
P A
P A
5610
2 6 W a y 2 6 W a y
Motherboard I/F
P B
P B
B A SI C Bat Con Bat Con
B A SI C
Bat Con
Battery
Figure 2-1 Block Diagram
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2.2 Technical Specifications - Internal GSM Modem(MM6854)
Performance Specifications 91/263/EEC ETS 300 342-1 ETSI GSM 0707/05 AT commands plus Extended SMS GSM rec. 7.05 including PDU mode GSM 04.21 transparent data GSM 04.22 non-transparent data 890 to 960MHz 1710 to 1880MHz Class 4 (2W) for 900MHz Class 2 (1W) for 1800MHz -102dBm at 900MHz, -100dBm at 1800MHz (<2% bit error rate) Modified GMSK 282MHz <25mS V24 9 pin D-type Baud rate 300 57600 baud, no autobauding. Set to 19200 as default. Parity: None, Space, Odd, Even or Mark Character Format: 7 or 8 Stop bits: 1 or 2 Level: To CCITT Recommendation V.28 Transparent Non-error corrected link according to GSM 04.21 User rates: 2400 bps V.22 bis / V.26 ter / V.110 4800 bps V.32 / V.110 9600 bps V.32 / V.110 14400 bps V.32 / V.110 GPRS1 Non-Transparent Error connected link according to GSM 04.22 (V.42) User rates: 9600 bps V.32 / V.110 14400 bps V.32 / V.110 GPRS1 Note: When using V.110, the correspondent has to be an ISDN adapter. Data compression according to V.42 bis. Transparent Fax Group 3, Class 1 support only. User rates; 2400 bps 4800 bps 7200 bps 9600 bps SMS GSM rec. 7.05, including PDU mode Small size SIM, 3 or 5V
Frequency Range RF Output Power
Receiver Sensitivity Modulation Type Intermediate Frequency Transmit Attack Time RS-232 Interface
Data Communication
SIM card Interface
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Technical Specifications - MM6854 Internal GSM Modem continued
General Specification Temperature Range Operating Charging Power Consumption (Performance without degradation unless stated) - 20 to +60ºc ºc - 0 to +40ºc ºc Standby 25mW Charging / On-air 4W max. 12V 333mA fit 800mA A/S fuse 24V 166mA fit 500mA A/S fuse +9V minimum to +28V DC maximum 172mm long x 82mm wide x 30mm high 325 grams GSM/GPS inclusive
Current Consumption Supply Voltage Dimensions Weigh
Note: Maxon Europe reserves the right to alter these specifications without prior notification as part of our continuous improvement policy.
2.3 Technical Specifications GPS (SGM5610)
GPS Receiver GPS Frequency GPS Processor GPS Memory GPS Position accuracy 12 channels L1 ST20 GP6 33MHz 4/8Mbit Flash Stand alone: Differential: 40m CEP 2 3m CEP
GPS Dynamics GPS Time to first fix
Velocity 514m/s Autonomous: Cold: Warm: Obscuration: 90 seconds 45 seconds 2 seconds 200mS
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2.4 Technical Specifications MM6900/7000 package
Size: Weight Voltage Power 82 x 30 x 150/172mm 325g +9 to +28VDC 4.75W (Max) 30mW (Standby) -20 to +60°C Operation -20 to +70°C Storage 0 to 40°C Charging 95% max (non-condensing) The unit has a tri-colour LED indicator, which shows red, green or yellow. See Section 3 for a detailed description. 50 ohm SFA female
Temperature
Humidity LED Interface
External GPS Antenna Connection External GSM Antenna Connection External GPS Antenna Power
50 ohm TNC female
+3.8VDC @ 50mA max.
9 Way `D' Type Socket Pin 1 2 TXD 3 RXD 4 DTR 5 GND 6 DSR 7 RTS 8 9
Function Serial Data out (RS232 Levels) Serial Data in (RS232 Levels) Data Terminal Ready (RS232 Levels) Ground Data Set Ready (RS232 Levels) Ready to Send (RS232 Levels)
Table 2-1 Pin Out for 9 way D-type socket
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25 Way `D' Type Socket Pin 1 GND 2 PROG_VEXT 3 PROG_VPROG 4 PROG_RX 5 PROG_TX 6 MICN 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 MICP ERPN ERPP GND SW1_IN SW1_OUT GND GND CON PWR PWR_GND SW2_IN SW2_OUT GSM_ON IN1 (Ignition sense) IN2 (Alarm input) IN3 (spare input) (N/A) IN4 (spare input) (N/A) IN5 (spare input) (N/A)
Function Ground Software update supply 5.2 7.2 VDC Software update programming voltage 0 5.2 VDC Software update serial data Rx 0 3 VDC Software update serial data Tx 0 3 VDC Balanced microphone negative input 150 +/- 7 Ohm, 1mW input power. Balanced microphone positive input 150 +/- 7 Ohm, 1mW input power. 1 Audio output, negative line 3.2 Vpp max output 1 Audio output, positive line 3.2 Vpp max output Ground 3 External High Side Switch 1 IN (0-30V DC supply) 3 External High Side Switch 1 OUT (switched output) Ground Ground GSM on/off input (gnd to turn on)(linked to GSM ON) Power supply, 9 to 28 VDC Power Ground 3 External High Side Switch 2 IN (5-30V DC supply) 3 External High Side Switch 2 OUT (switched output) GSM on/off output (linked to CON in 25 way shell) 2 External Input 1 (5-30V DC) 2 External Input 2 (internally pulled high) 2 External Input 3 (internally pulled high) 2 External Input 4 (internally pulled high) 2 External Input 5 (internally pulled high)
Table 2-2 Pin Out for 25 way D-type socket 1. 2. 3. Audio output can be switched on/off by the 5610 When in sleep mode, requires transition >15ms duration to wake up. Switched outputs have internal protection and current limiting (1.4A continuous) and can be directly switched inductive loads.
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3 SYSTEM APPLICATIONS
Fleet Management
Construction
Transportation
Anti-Theft
Utilities
Emergency Services
Refrigerated Trucks
Taxis
Delivery Vans
Courier Companies
Vending Machines
Surveillance
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3.1 Applications
The MM6900/MM7000 can be used in many applications within the consumer and business sectors Applications utilising the MM6900 and MM7000 are as follows.
3.1.1 MM6900
The Vodafone Corporate Eye application by Loca Vista
3.1.2 MM7000
The TRAKM8 Standard Application by Interactive Projects Ltd. The TRAKM8 Advanced Application by Interactive Projects Ltd. The TEKNOTRAK Application by Interactive Projects Ltd www.interactive-projects.com www.trakm8.com www.teknotrak.com
The PINPOINTERS application by pinpointers www.pinpointers.com
The TRANSTRAX Application by Transtrax. www.transtrax.com
For specific information concerning any of the above applications please visit the appropriate web site.
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4 OPERATION
4.1 Introduction
This section covers the simple operation of the modems. It provides the relevant information for the user to get the modem up and running. A +9V to +28VDC power supply will be required, together with a Windows 95 PC, installed with Hyper terminal, or similar package, a CA8360 power cable, a CA8401 antenna and a CA8361 PC serial cable.
4.2 Network Connection
It is necessary to obtain a SIM from your chosen Network Provider. This SIM must be suitable for Data service. All information needed to connect you to the network and to initiate billing for your calls is stored in the gold-plated area of the SIM card, along with the names, numbers and messages you have entered into the phone book, or received. To prevent either, the loss of information or corruption of information, avoid touching the gold area and do not place the SIM near electrical or magnetic fields. A damaged SIM will not allow you to access the GSM network.
4.2.1 Inserting the SIM card
The SIM card will probably be supplied in a cardholder and will need to be carefully pressed free, before fitting. The modem must not be powered. If the 25-way D-type connector is removed, this ensures that this is the case. The modem should be turned upside down and the two small countersunk screws removed to expose the SIM card area. The location / fitting of the SIM is identical to the MM6854, shown below.
Figure 4-1 Location of SIM card
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Care should be taken to ensure that the card is correctly fitted and is held in place. This is accomplished by fitting the card (with the gold area facing downwards) underneath the two lugs and then sliding the metal holder over the top of the card to secure it.
SIM card inserted here Metal Holder
Figure 4-2 Installation of SIM card The lid can now be attached and held in place with the two screws.
4.3 Turning on the modem
To turn on the modem, connect power between pin 16 (+9V to +28VDC) and pin 17 (GND) of the D25 connector. Alternatively, fit any of the accessory cables shown in section 7 of this manual.. Connect a suitable antenna; the Maxon CA8403 is a dual combined GSM/GPS antenna and is ideal. Note: It is important that the antenna ground is not connected to the modem ground. This will not happen where through glass antennas are used. Antennas, which are through chassis mounting and connect to the vehicle chassis should not be used. Failure to observe this may result in damage to the unit and will invalidate the warranty. Provided that the SIM card is unlocked, the modem will make an automatic search for your home network or another suitable network operator in your location. The modem will initially flash RED as it establishes a network connection (within seconds) and then flash GREEN. Note: To prevent unauthorised use, the SIM can be protected by a PIN code (See Section 5.1.48). Each time the modem is switched on the PIN code must be entered. If you enter the wrong code, three times in succession, your SIM will be barred from the network and the modem will require a PUK code.
4.4 V.24 Interface
The modem, when running with an MM7000 application is set to communicate with a baud rate, which is set as default to 4800 baud. The modem does not support autobaud and therefore it is important that any equipment, which communicates with the modem, is set to 4800 baud. The MM6900 default is 9600 baud.
4.5 Summary
This section has covered the basic operation of the modem.
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5 AT COMMANDS
5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.1.6 5.1.7 5.1.8 5.1.9 5.1.10 5.1.11 5.1.12 5.1.13 5.1.14 5.1.15 5.1.16 5.1.17 5.1.18 5.1.19 5.1.20 5.1.21 5.1.22 5.1.23 5.1.24 5.1.25 5.1.26 5.1.27 5.1.28 5.1.29 5.1.30 5.1.31 5.1.32 5.1.33 5.1.34 5.1.35 5.1.36 5.1.37 5.1.38 5.1.39 5.1.40 5.1.41 5.1.42 5.1.43 5.1.44 5.1.45 5.1.46 5.1.47 5.1.48 5.1.49 5.1.50 5.1.51 5.1.52 5.1.53 5.1.54 5.1.55 5.1.56 Issue 1.3 08/02 +++ - Escape command............................................................................................................. 20 A/ Re-execute last command .................................................................................................. 20 ATA Manually answer an incoming call .................................................................................. 21 ATD Dial a telephone number................................................................................................. 21 ATDL .......................................................................................................................................... 21 ATE Command Echo .............................................................................................................. 22 ATH Hang up........................................................................................................................... 22 ATI - Identification ...................................................................................................................... 22 ATO0 Return to transparent mode (switch from command to data mode)............................. 23 ATS0 Auto-answer mode ........................................................................................................ 23 ATS1 Display Number of rings................................................................................................ 23 ATS2- Escape character ............................................................................................................ 24 ATS3 Command line termination character ............................................................................ 24 ATS4 Line Feed character ...................................................................................................... 24 ATS5 Backspace character..................................................................................................... 25 ATS6 Pause before blind dialling............................................................................................ 25 ATS7 Wait time for carrier....................................................................................................... 25 ATS8 Wait time before dialling................................................................................................ 25 ATS10 Wait time before disconnection................................................................................... 26 ATS12 Escape code guard time ............................................................................................. 26 ATV Results code format ........................................................................................................ 26 ATX Defines CONNECT results code format ......................................................................... 27 ATZ Load user profile.............................................................................................................. 27 AT&C Data carrier detect options ........................................................................................... 27 AT&D Data Terminal Ready options....................................................................................... 28 AT&F Restore default configuration........................................................................................ 28 AT&V Display Current Configuration ...................................................................................... 29 AT&W Save Current Configuration ......................................................................................... 29 AT+CBST Select bearer service type ..................................................................................... 30 AT+CEER Displays why last call was disconnected............................................................... 31 AT+CGMI Request manufacturer identification ...................................................................... 31 AT+CGMM Request model identification................................................................................ 31 AT+CGMR Request version identification .............................................................................. 31 AT+CGSN Request product serial number identification........................................................ 32 AT+CIMI Request International mobile subscriber identity..................................................... 32 AT+CLIP Calling Line Identification Presentation ................................................................... 32 AT+CMEE Report Mobile Equipment Error ............................................................................ 33 AT+CMGD Delete SMS Messages......................................................................................... 33 AT+CMGF Select SMS Message Format............................................................................... 33 AT+CMGL List SMS Messages .............................................................................................. 34 AT+CMGR Read SMS Messages........................................................................................... 34 AT+CMGS Send SMS Messages ........................................................................................... 35 AT+CMGW Write SMS Messages to Memory........................................................................ 35 AT+CMSS Send SMS Messages from Storage ..................................................................... 36 AT+CNMI New SMS Message................................................................................................ 37 AT+COPS Operator Selection. ............................................................................................... 38 AT+CPAS Phone activity status.............................................................................................. 38 AT+CPIN Enter PIN and query blocks .................................................................................... 39 AT+CR Cellular Result Code for Outgoing Calls .................................................................... 39 AT+CRC Cellular result code.................................................................................................. 40 AT+CREG Network Registration............................................................................................. 41 AT+CRLP Radio Link Protocol parameters ............................................................................ 42 AT+CSCA Service centre address.......................................................................................... 42 AT+CSCS Select TE character set ......................................................................................... 43 AT+CSDH Show test mode parameters ................................................................................. 43 AT+CSMP Set text mode parameters .................................................................................... 43 ME820066 : MM6900/7000 GSM Data Modem with GPS Page 19
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5.1.57 5.1.58 5.1.59 5.1.60 5.1.61 5.1.62 5.1.63 5.1.64 5.1.65 5.1.66 5.1.67 5.1.68 5.1.69 5.1.70 5.1.71 5.1.72 5.1.73 5.1.74 5.1.75 5.1.76 AT+CSQ Signal quality............................................................................................................ 44 AT+CSTA Select type of address ........................................................................................... 44 AT+DR Data compression report ............................................................................................ 45 AT+DS Data compression mode............................................................................................. 45 AT+FCLASS Select, read or test service class....................................................................... 46 AT+FMI Report manufacturer ID............................................................................................. 46 AT+FMM Report module ID .................................................................................................... 46 AT+FMR Report revision......................................................................................................... 46 AT+GMI Get manufacturer ID ................................................................................................. 47 AT+GMM Get manufacturer model ID .................................................................................... 47 AT+GMR Get manufacturer revision ID .................................................................................. 47 AT+GOI Request global object identification .......................................................................... 47 AT+GSN Request product serial number identification .......................................................... 48 AT+ICF Character framing ...................................................................................................... 48 AT+IFC Local flow control ....................................................................................................... 49 AT+ILRR Display local report rate........................................................................................... 49 AT+IPR Set terminal equipment data rate .............................................................................. 50 +CME ERROR ..................................................................................................................... 51 CMS ERROR ....................................................................................................................... 52 S Register Summary .................................................................................................................. 52
5.1.1 +++ - Escape command
By sending the escape sequence +++ during a data call, the modem will return to AT command mode. Then you can send the ATH command for automatic termination of the connection: Command from Application +++ Response by GSM to Application OK (modem is now in command mode) Notes: Functional during a data call (see the ATH command). No is needed as this will be interpreted as transmission data and the modem will stay in call mode. Result codes: OK
Reference: V.25ter
5.1.2 A/ Re-execute last command
The A/command lets you re-execute the last command entry. This command is not preceded by AT and does not have to end with : Command from Application Previous Command ATD12345678 Followed by A/ Reference: V.25ter Response by GSM to Application
BUSY ATD12345678 (Re-executes the last AT command) Notes: None Result codes: OK (Depends upon command being re-executed)
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5.1.3 ATA Manually answer an incoming call
The modem does not automatically answer an incoming call (ATS0=0 is the Default setting). The ATA command allows the modem to manually answer a call if issued while the modem rings: Command from Application ATA Reference: V.25ter Response by GSM to Application The modem will answer the incoming call Notes: See the ATS0 command Result codes: None
5.1.4 ATD Dial a telephone number
This command will dial the number entered after the ATD command: Command from Application ATD12345678 For a voice call insert a semicolon after the number ATD12345678; The Modem initiates a voice call to telephone number 12345678 Notes: As soon as the modem detects the carrier from the GSM base station, it returns the CONNECT result code. Data transmission can now begin. If you have a data only SIM and a voice call is made the result code will be NO CARRIER. If AT+CRC is enabled then the cellular result codes will be displayed upon connection. (see section 5.1.56) The following characters are valid in a dial string: The digits from "0" to "9", and "+" for making International calls. The + must be at the beginning of the number. Result codes: ERROR NO CARRIER CONNECT Mobile equipment result code Response by GSM to Application The modem dials the telephone number 12345678 Connect 14400 (Selected speed)
Reference: V.25ter
5.1.5 ATDL
This command will dial the last number, which the modem dialled: Command from Application ATD12345678 ATDL Response by GSM to Application The Modem Dials telephone number 12345678. The Modem Re-dials the last number called ATD12345678 Notes: None Result codes: ERROR NO CARRIER CONNECT Mobile equipment result code
Reference: V.25ter
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5.1.6 ATE Command Echo
This command is used to enable and disable echo. Command from Application ATE0 ATE1 Response by GSM to Application Disable echo. Enable echo. Notes: Can only be displayed using AT&V Result codes: OK ERROR
Reference: V.25ter
5.1.7 ATH Hang up
This command is used for asynchronous transmission only. If the user returns from data mode to command mode after sending an escape sequence (+++) or after disabling the DTR signal with AT&D1 option, the modem can be forced to disconnect by sending the ATH command. Command from Application ATH Response by GSM to Application OK (The Modem disconnects the call) Notes: Used after the escape sequence +++ Result codes: OK ERROR
Reference: V.25ter
5.1.8 ATI - Identification
This command allows you to display information about the product identification. Command from Application ATI Response by GSM to Application The Modem displays Product Information Text: MAXON TELECOM A/S MX-6854 4.11 Jul 5 2001 10:01:42 DATAMODEM OK Where X = Revision, yy = variant, MMM = month, DD = day, YYYY = year, HH = hour, MM = minute and SS = seconds Notes: The above lines can be requested individually using: AT+GMI or AT+CGMI (Manufacturer's ID) AT+GMM or AT+CGMM (Model ID) AT+GMR or AT+CGMR (Revision ID) Result codes: OK ERROR X.yy_MMM_DD_YYYY _HH:MM:SS
Reference: V.25ter
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5.1.9 ATO0 Return to transparent mode (switch from command to data mode).
If you wish to interrupt the data flow only briefly, you can use the ATO0 command to return your modem to the transparent mode, i.e. the data flows once again. Command from Application ATO0 Response by GSM to Application Return the Modem to Transparent mode Notes: None Result codes: NO CARRIER CONNECT
Reference: V.25ter
5.1.10 ATS0 Auto-answer mode
This command is used to set the auto answer register S0 of the modem Command from Application ATS0= Where 0 1 5 ATS0? Response by GSM to Application (Sets the auto answer register to ) No auto-answer, incoming calls are ignored . The modem will answer incoming calls after the first ring. The modem will answer incoming calls after the fifth ring. OK (The modem will display the current value of the S0 register) Notes: The ATA command can still be used regardless of the value of the ATS0 register. Although the range of n is 0 to 255 most networks will divert or terminate the call before the maximum value is reached. Result codes: OK ERROR
Reference: V.25ter
5.1.11 ATS1 Display Number of rings
This command allows you to display the number of rings the modem has detected. The register can also be written to (See Notes). Command from Application ATS1= ATS1? Response by GSM to Application (Set the number of rings detected to range of n = 0 255) Displays the number of rings, which the modem has detected. Notes: This register can be written to as well as read. This means that if you have the S0 register set you can force an auto answer by setting the S1 register to a number greater than S0. Result code: OK ERROR
Reference: V.25ter
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5.1.12 ATS2- Escape character
This command allows you to set the ASCII character to be used as the escape sequence character. Command from Application ATS2=" ATS2=127 ATS2=43 ATS2? Response by GSM to Application Sets the escape sequence character to decimal Disables the escape process. Sets ASCII + as the escape character . Displays the decimal value of the ASCII character used as the escape character. Notes: None Result codes: OK ERROR
Reference: V.25ter
5.1.13 ATS3 Command line termination character
This command allows you to set the ASCII character to be used as the escape sequence character. Command from Application ATS3= ATS3=13 ATS3? Response by GSM to Application Sets command line terminator to decimal (see notes) Sets CR as the command line termination character Displays the decimal value of the ASCII character used as the carriage return character. Notes: Setting any other value than the default 13 may cause problems when entering commands. Affects asynchronous operation only. Result codes: OK ERROR
Reference: V.25ter
5.1.14 ATS4 Line Feed character
This command allows you to set the ASCII character to be used as the escape sequence character. Command from Application ATS4= ATS4=10 ATS4? Response by GSM to Application Sets the line feed character to decimal Sets LF as the line feed character . Displays the decimal value of the ASCII character used as the line feed character. Notes: Affects asynchronous operation only. Result codes: OK ERROR
Reference: V.25ter
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5.1.15 ATS5 Backspace character
This command allows you to set the ASCII character to be used as the backspace character. Command from Application ATS5= ATS5=8 ATS5? Response by GSM to Application Sets the backspace character to decimal Sets backspace as the backspace character . Displays the decimal value of the ASCII character used as the backspace character. Notes: Affects asynchronous operation only. Result codes: OK ERROR
Reference: V.25ter
5.1.16 ATS6 Pause before blind dialling
The value of this register is ignored. Default value (2).
5.1.17 ATS7 Wait time for carrier
This command allows you to set the time in seconds that the modem must wait before hanging up if it fails to detect the remote carrier. Command from Application ATS7= ATS7=60 ATS7? Response by GSM to Application Sets the wait for carrier time to n seconds. Range n = 0-255 Sets the wait for carrier time to 60 seconds . Displays the number of seconds the modem must wait before hanging up after failing to detect the remote carrier. Notes: Affects asynchronous operation only. Result codes: OK ERROR
Reference: V.25ter
5.1.18 ATS8 Wait time before dialling
This command allows you to set the number seconds to wait when the comma dial modifier is encountered in the dial string. Command from Application ATS8= ATS8=2 ATS8? Response by GSM to Application Sets the wait time before dialling to n seconds. Range n = 0-255 Sets the wait time before dialling to 2 seconds . Displays the wait time in seconds before dialling Notes: None. Result codes: OK ERROR
Reference: V.25ter
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5.1.19 ATS10 Wait time before disconnection
This command allows you to set the number of tenths of seconds to wait before disconnecting after the modem has indicated the absence of the received line signal. Command from Application ATS10= ATS10=15 ATS10? Response by GSM to Application Sets the wait time before disconnection to n tenths of a second. Sets the wait time before disconnection to 15 tenths . Displays the wait time in tenths of seconds before disconnecting Notes: Value is in tenths of seconds. Range n = 0 255 Result codes OK ERROR
Reference: V.25ter
5.1.20 ATS12 Escape code guard time
Defines the maximum silence time, in fiftieths of a second, accepted between two characters in an escape sequence. Command from Application ATS12= ATS12=10 ATS12? Response by GSM to Application Sets the escape code guard time to n fiftieths of a second Sets the escape code guard time to 0.2 seconds . Displays the maximum silence time in fiftieths of a second Notes: Range of n = 0 - 255. Result codes: OK ERROR
Reference: V.25ter
5.1.21 ATV Results code format
This command is used to select short or long result codes. Command from Application ATV0 ATV1 Response by GSM to Application Sets short result codes. Sets long result codes. Notes: Can only be viewed using the command AT&V. Result codes: OK ERROR
Reference: V.25ter
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5.1.22 ATX Defines CONNECT results code format
This command is used to define the result code for CONNECT. Command from Application ATX0 ATX1 ATX2 ATX3 ATX4 Response by GSM to Application Modem returns only the CONNECT code as soon as a satisfactory connection has been set up. Modem returns only the CONNECT and code as soon as a satisfactory connection has been set up. Same as ATX1 Same as ATX1 Same as ATX1 Notes: None Result codes: OK ERROR
Reference: V.25ter
5.1.23 ATZ Load user profile
This command will allow you to load a user-defined profile. Command from Application ATZ ATZ0 Response by GSM to Application Load User defined profile Load User profile 0. Notes: .None (only 1 user profile) Result codes: OK ERROR
Reference: V.25ter
5.1.24 AT&C Data carrier detect options
This command affects the DCD line connected to the serial port. Command from Application AT&C0 Response by GSM to Application Sets the GSM module DCD control line to ON regardless of the data carrier status of the distant station. DCD specifies the data carrier status of the distant station. DCD on indicates that a connection exists. Notes: AT&C1 (can only be displayed using AT&V) Result codes: OK ERROR
AT&C1
Reference: V.25ter
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5.1.25 AT&D Data Terminal Ready options
This command affects the DTR line connected to the serial port. Command from Application AT&D0 AT&D1 Response by GSM to Application The modem ignores status on DTR. The modem changes to the command mode when the DTR line switches from ON to OFF. The modem sets up a connection to the distant station, switches to command mode and deactivates auto-answer mode when the DTR line switches from ON to OFF. Auto-answer can be re-activated by resetting DTR to ON. Notes: None. AT&D2 (can only be displayed using AT&V). Result codes: OK ERROR
AT&D2
Reference: V.25ter
5.1.26 AT&F Restore default configuration
This command allows the Modem to be reset to factory default settings Command from Application AT&F Response by GSM to Application Resets to factory defaults excluding AT+IFC, AT+IPR, AT+ ICF. These parameters are left at the settings before the execution of the command. This ensures the controlling device can always talk at the designated baud rate with the flow control and framing characters remaining unaltered. Resets to factory defaults and changes the communication parameters depending on (see below) The same as AT&F (See above) with AT&IFC=2,2 (Hardware Handshaking) with AT&IFC=1,1 (Software Handshaking) with AT&IFC=2,2, AT&ICF=3,3 and AT&IPR=19200 Notes: Factory Defaults shown as in this document. Result codes: OK ERROR
AT&F Where 0 1 2 3
Reference: V.25ter
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5.1.27 AT&V Display Current Configuration
This command will display the current configuration settings of the modem Command from Application AT&V Response by GSM to Application The modem displays a list of the current settings of the Modem Below is the response to the AT&F3 E1 L0 M0 Q0 V1 X4 &C1 &D2 S0:0 S2:43 S3:13 S4:10 S5:8 S6:2 S7:60 S8:2 S10:15 S12:10 S13:60 S1:0 +CBST: 7,0,1 +CSMS: 0 +CRLP: 61,61,48,6,0,3 +CRC: 0 +CR: 0 +FCLASS: 0 +IFC: 2,2 +IMODE: 0 +ICF: 3,3 +DR: 0 +CMGF: 0 +CSDH: 0 +CNMI: 2,1,0,0,0 +ILRR: 0 +IPR: 19200 +DS: 3,0,512,20 +CMEE: 0 +CREG: 0 +CLIP: 0 +CSCA: "+44385016005",145 +CSMP: 17,169 Notes: See the AT&F function options Result codes: OK ERROR
Reference: V.25ter
5.1.28 AT&W Save Current Configuration
This command will allow you to save the current configuration settings of the modem. Command from Application AT&W Response by GSM to Application The modem saves the current configuration settings Notes: The Modem will return to the saved settings after a power cycle Result codes: OK ERROR
Reference: V.25ter
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5.1.29 AT+CBST Select bearer service type
This command allows you to select the bearer service to be used when data calls are originated. Command from Application AT+CBST Where 0 1 2 3 4 5 6 7 12 14 65 66 68 70 71 75 Where 0 2 Where 0 1 AT+CBST? Response by GSM to Application The modem sets up the bearer service to be used. Selected Speed Auto Baud (not supported) 300bps / V.21 1200bps / V.22 1200/75bps / V.23 2400bps / V.22 bis 2400bps / V.26 ter 4800bps / V.32 9600bps / V.32 9600bps / V.34 14400bps / V.34 300bps / V.110 300bps / V.110 2400bps / V.110 4800bps / V.110 9600bps / V.110 14400bps / V.110 Bearer Service Name Data Circuit Asynchronous (UDI or 3.1kHz modem) Pad Access Asynchronous (UDI) Connection Element Transparent Non-transparent The modem will reply with the selected speed, name and connection element. (7,0,1 ) The modem will reply with the supported speeds, modes and protocols. (0 to 7, 12,14,65,66,68,70,71,75)(0,2)(0,1) Notes: None Result codes OK ERROR
AT+CBST=?
Reference: GSM 07.07
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5.1.30 AT+CEER Displays why last call was disconnected
This command lets you query the reason why the last call was disconnected. Command from Application AT+CEER Response by GSM to Application NETSTAT: Where is the network number code +CEER Where will be a text indication Notes: None. Result codes: OK ERROR
Reference: GSM 07.07
5.1.31 AT+CGMI Request manufacturer identification
This command lets you display the Manufacturer's Identification according to GSM 07.07 Command from Application AT+CGMI Response by GSM to Application Displays the manufacturer's identification: MAXON TELECOM A/S Notes: None Result codes: OK ERROR
Reference: GSM 07.07
5.1.32 AT+CGMM Request model identification
This command lets you display the Manufacturer's Model Identification according to GSM 07.07 Command from Application AT+CGMM Response by GSM to Application Displays the manufacturer's model identification: MX-6854 Notes: None Result codes: OK ERROR
Reference: GSM 07.07
5.1.33 AT+CGMR Request version identification
This command allows you to display the manufacturer's Software version according to GSM 07.07 Command from Application AT+CGMR Response by GSM to Application Displays the version identification of the product: X.xx_MMM_DDD_YYYY_hh_mm_ss Notes: None Result codes: Where X = Revision, yy = variant, MMM = month, DD = day, YYYY = year, HH = hour, MM = minute and SS = seconds
Reference: GSM 07.07
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5.1.34 AT+CGSN Request product serial number identification
This command allows you to display the Product serial number according to GSM 07.07 Command from Application AT+CGSN Response by GSM to Application where is the serial number of the product or IMEI number: Notes: 15 digit IMEI number Result codes: OK ERROR
Reference: GSM 07.07
5.1.35 AT+CIMI Request International mobile subscriber identity
This command allows the user to request the International Subscriber Identity. Command from Application AT+CIMI Response by GSM to Application +CIMI: Where is the international mobile subscriber identity. Unique SIM identity. Notes: None Result codes: OK ERROR
Reference: GSM 07.07
5.1.36 AT+CLIP Calling Line Identification Presentation
This command allows the user to control whether the Calling Line Identification is presented. Command from Application AT+CLIP= Where 0 1 Response by GSM to Application Set the calling line identity presentation depending on Disable calling line identification presentation Enable calling line identification after every RING or CRING if. AT+CRC is enabled. e.g. RING +CLIP: "nnnnnnnnnnnnnn",xxx CRING: REL ASYNC +CLIP: "nnnnnnnnnnnnn",xxx where "nnnnnnnnnnnn" = The calling subscriber number xxx = Type of addr Octet in integer format AT+CLIP? +CLIP: Displays the current settings where = result code presentation status 0 Disabled 1 Enabled Where = Subscriber CLIP service status 0 CLIP not provisioned 1 CLIP provisioned 2 CLIP unknown (only supported option) (0-1, 1) +CLIP: (0,1) Displays a list of supported values of . Notes: Only =1 supported i.e. CLIP provisioned Result codes: OK
AT+CLIP=? Reference: GSM 07.07
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5.1.37 AT+CMEE Report Mobile Equipment Error
This command Command from Application AT+CMEE= Where AT+CMEE=0 AT+CMEE=1 Response by GSM to Application
Disables +CMEE error reporting and reports ERROR instead. Enables +CME ERROR using numeric format for e.g. +CME ERROR: 27 Enables +CME ERROR using verbose format for e.g. +CME ERROR Invalid characters in dial string Displays the current setting +CMEE: Displays the supported values +CMEE:(0,1,2) Notes: None Result codes: OK ERROR
AT+CMEE=2
AT+CMEE? AT+CMEE=?
Reference: GSM 07.07
5.1.38 AT+CMGD Delete SMS Messages
This command is used to delete a received stored SMS message. Command from Application AT+CMGD= Response by GSM to Application Delete SMS entry corresponding to where is the location in the SIM memory. Notes: None. Result codes: OK ERROR Message service failure result codes.
Reference: GSM 07.05
5.1.39 AT+CMGF Select SMS Message Format
This command allows you to define the input and output format of the SMS message. Command from Application AT+CMGF=0 Response by GSM to Application Set to PDU mode. The SMS message including all header information is presented as a binary string. Set to text mode, The SMS message including all header information is presented as an ASCII string. Displays the current setting +CMGF: 0 Displays the supported values. +CMGF: (0-1) Notes: None. Result codes: OK ERROR Message service failure result codes.
AT+CMGF=1
AT+CMGF? AT+CMGF=?
Reference: GSM 07.05
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5.1.40 AT+CMGL List SMS Messages
This command is used to list the SMS messages stored in the modem. Command from Application AT+CMGL= Where In text mode: "REC UNREAD" "REC READ" "STO UNSENT" "STO SENT" "ALL" In PDU mode: 0 1 2 3 4 AT+CMGL::, ,,,, Where AT+CMGL=? Response by GSM to Application
Receive unread messages. Stored read messages. Stored unsent messages. Stored sent messages. All messages Received unread messages Stored read messages Stored unsent messages Stored sent messages All messages +CMGL: 1,"REC READ","+44XXXXXXXXXX","02/08/02 20:56:37",This is a test message
Location in memory Status of message Destination Address type value according to GSM 03.40. .TP user data GSM 03.40 Displays the supported values. +CMGL: "REC READ","REC UNREAD","STO SENT","STO UNSENT","ALL" Notes: None. Result codes: OK ERROR Message service failure result codes.
Reference: GSM 07.05
5.1.41 AT+CMGR Read SMS Messages
This command is used to read SMS messages. Command from Application AT+CMGR= Where Response by GSM to Application Read the SMS message from location specified by Integer indicating the location of the SMS to be read. TP user data GSM 03.40 Notes: None. Result codes: OK ERROR Message service failure result codes.
Reference: GSM 07.05
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5.1.42 AT+CMGS Send SMS Messages
This command is used to send SMS messages. Command from Application In text mode: AT+CMGS="Receiver Number" CtrlZ or ESC to abort send Response by GSM to Application > (enter text to be sent) OK (sends the message) (this is followed by the confirmation response) +CMGS: where is the Message reference according to GSM 03.40 and is the number of messages sent since power up.
In PDU mode: AT+CMGS= CtrlZ or ESC to abort the send. Where
Reference: GSM 07.05
Number of characters in text mode, or length of binary string in PDU mode. Binary string coded according to GSM 03.38 Notes: Esc quits without sending. Result codes: OK ERROR Message service failure result codes.
5.1.43 AT+CMGW Write SMS Messages to Memory
This command is used to store an SMS message into the memory. Command from Application In text mode: AT+CMGW= CtrlZ or ESC to abort the write. Response by GSM to Application > enter text to be stored OK (stores the message) (this is followed by the confirmation response) +CMGW: where is the stored location
In PDU mode: AT+CMGW= CtrlZ or ESC to abort the write. Where
Reference: GSM 07.05
TP Destination Address. Address value field in string format GSM 03.40 . Number of characters in text mode, or length of binary string in PDU mode. Notes: Esc quits without sending. Result codes: OK ERROR Message service failure result codes.
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5.1.44 AT+CMSS Send SMS Messages from Storage
This command is used to send a stored SMS message. Command from Application AT+CMSS=[,,] Response by GSM to Application Sends message stored in location corresponding to . OK (sends the message) (this is followed by the confirmation response) +CMGS: where is the Message reference according to GSM 03.40 and is the number of messages sent since power up. Where TP Destination Address. Address value field in string format GSM 03.40. Location in memory Integer format of . Notes: Result codes: OK ERROR Message service failure result codes.
Reference: GSM 07.05
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5.1.45 AT+CNMI New SMS Message
This command allows you to determine how the modem shall notify the user when a SMS message is received from the network operator. Command from Application AT+CNMI=,, , Where 2 Response by GSM to Application Set message indication mode.
Buffer unsolicited result codes in the modem when the serial link is in use and deliver them when the serial link is unused. Forward unsolicited result codes directly to the user. Serial link specific in-band used to embed result codes as data when the modem is in on-line mode. Disable SMS-deliver indication. If SMS-deliver is stored in modem, indication of memory location routed to the user using +CMTI, indication that new message has been received . SMS deliveries are route