AT&T Remote Port Security Device user manual Hardware Replacement, Modem Ring Test

Modem Ring Test

The Modem Ring Test tells you whether the call attempts are getting through to the modem. If there is a problem with the RPSD Lock, the PBX modem, or the cabling, the call will not reach the modem. The likeliest result, in the case of a problem, is a Ring No Answer.

To perform the Modem Ring Test, dial the RMATS channel from a touch-tone telephone. When the call is answered, you will hear a tone indicating a connection to the RPSD Lock. Press 3 ✱ on the telephone pad.

The RPSD Lock responds to the command by ringing the modem. While the Lock rings the modem, you will hear a simulated ring on the telephone handset. When the modem picks up, you will hear the answer tone. The answer tone will not last long enough for the modem to perform handshaking. The Lock will then send 3 quick beeps to your telephone and disconnect the call.

The RPSD Lock also generates a status message similar to the following:

104 08/14/90 16:21:34 Remote Test 3 (Modem Ring) Completed OK

If you do not hear the answer tone, the problem may be the RPSD Lock, the PBX modem, or the cabling. Your next action should be to check the equipment by physically replacing the hardware. See Hardware Replacement in this chapter for procedures.

Hardware Replacement

The built-in diagnostics of the RPSD Lock may indicate that there is a hardware failure, but they will not necessarily determine whether that failure is in the CO line, RPSD Lock, PBX modem, or caller’s equipment or lines. In such a situation, the best way to determine where the failure is occurring is to methodically replace individual components of the hardware with a touch-tone telephone. The following sections describe the procedure for such replacement in the order you should perform it.

Note: The modem for the System 75 and DEFINITY Generic 1 is internal to the PBX and located on the circuit board. The modem for the System 85 and DEFINITY Generic 2 is external to the PBX.

Testing the RPSD Lock 5-9