Lucent Technologies manual Possible Cause 5 The telephones may be defective

MERLIN LEGEND Communications System Release 5.0	Issue 1
System Manager’s Guide 555-650-118	June 1997
8 Troubleshooting the System
Some Phones Are Dead (No Dial Tone or Lights)	Page 8-4

!WARNING:

If you must check something on the control unit, proceed with caution. Avoid standing on a box or chair to reach the unit if it is installed out of easy reach. If you do not have a stable ladder or other proper equipment, do not proceed; wait for the Lucent Technologies technician.

Possible Cause 4: If an MLX telephone is not working, it may be plugged into an MLX extension jack that is programmed for CTI (Computer Telephony Integration) link.

What to do: Follow the procedure for printing an Extension Information Report to determine whether the jack is programmed for CTI link. See Chapter 6, “Managing the System,” or System Programming for details.

■If the jack is programmed for a CTI link and you wish to retain the link, plug the MLX telephone into another available MLX jack.

■If the jack is programmed for a CTI link and you wish to remove the link programming, unplug the telephone from the MLX jack. Then see

‘Removing‘ a CTI Link’’ on page 6-92 or System Programming for the correct procedure.

■If the jack is not programmed for a CTI link, go to Possible Cause 5.

Possible Cause 5: The telephones may be defective.

What to do: Test each telephone by replacing the dead telephone with a similar telephone that you know is working properly.

■If the replacement telephone receives dial tone and its lights function, then replace it with the original telephone and check again. If the original telephone still does not receive dial tone and its lights do not function, then the original telephone may be defective. Call the Lucent Technologies Helpline at 1 800 628-2888 (consultation charges may apply).

■If the replacement telephone does not receive dial tone and its lights do not function, there may be a problem with the system wiring or the control unit. To test one possible wiring problem, go to Possible Cause 6.

NOTE:

The following procedure may help Lucent Technologies Helpline technicians analyze your problem. However, you should not perform this procedure unless you have experience removing the control unit cover and working with control unit extension jacks. Before proceeding, consult system planning Form 2a, System Numbering: Extension Jacks.