
Scenario/Test Steps
1. ISP (TATA) VoIP trunk has 100 DIDs and DODs. Configure the SIP Register trunk in UCM A. The SIP Trunk number (pilot number) is 68010200.
2. UCM A and UCM B are connected via Peer Trunk. Keep Trunk CID, Keep Original CID, and Caller ID disabled in Peer Trunks.
3. UCM B has ext. 1000. Ext. 1000’s DOD is 0068010201
4. When UCM B’s ext. 1000 makes a call to a mobile number via UCM A (TATA trunk), the mobile device shows 0068010200 (pilot number).
How-to

a. At UCM A > VoIP (TATA) Register Trunk:
– enable Keep Original CID
– disable Keep Trunk CID
b. UCM B > Inbound Route (Peer Trunk) > disable ‘Set CallerID Info’
c. UCM B > Peer Trunk > enable Keep Original CID
I have 3 UCM servers UCM6202, UCM6302 & UCM6300A different locations. I have a lot of time trying to peer and DOD those servers. after seeing this article, Now my server works fine.
Thanks
Glad to know that 🙂