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Old 06-23-2015, 01:11 PM
zakabog zakabog is offline
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Join Date: Aug 2014
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What kind of router did ATT provide? Do they see any errors on their interface pointing to the IP Office? Have you done a Monitor trace with a filter setup to show all of the SIP information? That will give you a good indication of what's happening.

You might also want to setup a HUB between the router and the IP Office, plug in a laptop, and do a packet capture using Wireshark to see what's happening when the SIP trunk goes down.
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