Pin | Name | Direction | Color | Description |
1 | -- | | | -- |
2 | DPR | | | Digit Present--A signal given to the ACE indicating that the digit lines contain a digit |
3 | ACR | | | Abandon Call and Retry---An indicator signal from the ACE that it could not make a connection. Could be 'busy'. |
4 | CRQ | | | Call A signal from the DTE that tells the ACE to go 'off hook'Request--- |
5 | PND | | | Present Next Digit---A signal from the ACE to the DTE to indicate that the ACE is ready to receive the next digit. |
6 | -- | | | -- |
7 | -- | | | -- |
8 | -- | | | -- |
9 | -- | | | -- |
10 | -- | | | -- |
11 | -- | | | -- |
12 | -- | | | -- |
13 | DSC | | | Distant Station Connected--Indicator from ACE to DTE that the call is succesfully made. |
14 | NB1-NB8 | | | Digit Signal Circuits--Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
15 | NB1-NB8 | | | Digit Signal Circuits--Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
16 | NB1-NB8 | | | Digit Signal Circuits--Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
17 | NB1-NB8 | | | Digit Signal Circuits--Four lines containing a parallel BCD dial digit (10 digits, plus control digits) |
18 | -- | | | -- |
19 | -- | | | -- |
20 | -- | | | -- |
21 | -- | | | -- |
22 | DLO | | | Data Line Occupied--An indicator that is used by the ACE to let the DTE know that the line it wants to use is used by another device. |