Our agency is working to get H.323 stations converted to SIP. I've got most call scenarios to work as expected. However, whenever forwarding a SIP station to off-net cell or enabling EC500, the call gets denied by our carrier. After doing some traces, I found this is because the diversion header only sends the 4-digit extension rather than the full 10-digit DID. Our carrier requires To, From, and Diversion headers to all have 10-digit numbers.
This works correctly with our H.323 stations because they don't do any address translation with CM's AAR like SIP does. For SIP, do any of you have experience making an adaptation in SMGR to add the extra digits to outbound diversion headers? Or is there another better method?
Thank you!
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Shane Comer
Network Engineer
Washington State Department of Health
Tumwater
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