AT&T MDC 9000 Specifications download pdf (Page 265)

Multiple Phones Dead: No Dial Tone or Lights

Possible Cause 1: The LED on one system module is out.

What to do: If the green LED on the front of a module is out, try reseating the module in

the control unit.

■ If the LED lights, the problem is corrected.

■ If the problem remains, call the hotline.*

Possible Cause 2: The green LEDs on several system modules are out.

What to do: If the LEDs on the front of several system modules are out, try reseating the

leftmost module of the ones with the lights out (see “Replacing System Modules” in the

PARTNER Plus Communications System Installation guide).

■ If the LEDs light, the problem is corrected.

■ If the problem remains, call the hotline.*

Poor Transmission Quality on Modem

Possible Cause: A high-speed modem is connected through an extension jack on the

control unit to a standard central office telephone line; but the line quality is not sufficient to

generate a clear signal when the modem transmits through the system interface.

What to do: Either connect the modem directly to the network interface jack for a line, or

contact your local telephone company for information about upgrading the line quality.

■ If the device works properly, the problem is solved.

■ If the problem remains, call the hotline.*

Other Problems with System

This procedure resets the system. Use it when you have any problems that are not

covered elsewhere in this chapter. The following procedure disconnects all calls in

progress, but does not erase any system settings.

Possible Cause: System needs a hardware reset.

What to do: Unplug the control unit’s power cord from the wall. Wait 10 seconds, then

plug it back in. If the problem remains, call the hotline.*

In the continental U.S., help is available at 1 800 628-2888. Outside the continental U.S., call your AT&T

Representative or local Authorized Dealer.

Troubleshooting 6-13

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AT&T MDC 9000 Specifications Page 265