AT&T Remote Port Security Device user manual Replacing the PBX Modem

Replacing the PBX Modem

To test whether the problem diagnosed by the Modem Ring Test is in the PBX modem, perform the following procedure:

1Disconnect the modular telephone plug from the PBX modem and connect a touch-tone telephone to the modem.

2Call the RMATS channel from a touch-tone telephone and perform the Modem Ring Test described in this chapter.

3If the phone you substituted for the modem rings, have someone answer it. If the connection is fine, the problem is in the modem.

If the call fails to ring the telephone, or the connection is faulty, it is likely that the modem is fine. Go to the next step.

4Remove the touch-tone telephone and reconnect the modem, but this time use a different cable between the RPSD Lock and the modem. Call the modem again from a telephone.

5If the system functions properly, the problem is in the cable. If the system continues to malfunction, go to the next step.

6Remove the substitute cable and put the original back in. Disconnect the RPSD Lock from the CO line and replace the Lock with a touch-tone telephone. Again, call the RMATS channel from a second telephone.

7If the telephone you substituted for the Lock rings, answer it. If the phones work properly, the problem is in the RPSD Lock. Replace the Lock. See Replacing the RPSD Lock in this chapter.

5-10Troubleshooting