atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems POTS Voltages

As a test - in Lines/analog options - I would change Trunk Type to Loop Start (from default Loop ICLID) and change Echo Cancellation Delay to OFF (especially if you're not using IP phones or IP trunks). You'll lose Caller ID during the test. I believe that this change will require a reboot - not just merge.
Mike