atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Legend UDP and ARS

To get these two switches to talk to each other at all, you must be using T1 tie (non-PRI) trunks. In order for the ShoreTel to be able to use the Legend's local trunks, you'll have to first loosen the restrictions on the tandem tie lines.

Choose LINES/TRUNKS, REMOTE ACCESS, NONTIE/TIELINES, RESTRICTIONS and change the restriction from "Outward Restricted" (default) to "Unrestricted".

See if that does it for you.