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LZB 115 2508 R1A Service of the Telephone Chapter 5 - Service of the Telephone Introduction This chapter contains Level 3 repair procedures for the CA638 and CF688 Cellular Phones, as well as final checkout procedures before returning the unit to service. NOTE If it is necessary to send the phone to a higher level of service, the data from the arrival test must be sent with the phone. NOTE The telephone must be reflashed whenever it is serviced. Refer to Chapter 4 for the reflashing procedure. 5-1 Service of the Telephone LZB 119 2508 R1A Required Tools and Test Equipment Required Tools The following are the tools needed to perform Level 3 service on the CA638 and CF688 Cellular Phones: