ADTRAN 25 manual Voice Transmission Troubles

6.Check CP translations from the SAT to be sure that this CP has

7.Check LEDs on CP. The red LED will be lighted if a fault on the CP affects all ports. Also, the red LED may be lighted if one or a few ports are faulty.

8.Check Error Log for relevant messages.

9.Reseat the CP even if the red LED is dark. (See “Reseating and Replacing Circuit Packs” under “Routine Maintenance” in this section.) Replace the faulty CP.

Voice Transmission Troubles

Symptoms:

Voice terminals not receiving tones.

Procedures:

1.Check that green LED on power supply is lighted. 2 . Check power supply for voltages.

Symptoms:

Many single-line sets or multibutton electronic telephone (MET) sets are not able to dial correctly even though they are able to receive

c a l l s .

Procedures: Using a single-line voice terminal, test the touch-tone registers as follows:

1.Go off-hook, and dial *3 and the 2-digit number (01 through 12) of the touch-tone receiver to be tested. Receivers 01 through 04 are on the ZTN85 or ZTN131 (R3) CP. Receivers 05 through 12 are present only if the system has TN748B CP(s).

You will hear busy tone if the receiver is in use. You will hear reorder tone if you misdialed or addressed a receiver not in the system (for example, you dialed *305 and the system does not have a TN748B CP). Try again.

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