Wrong caller id when SIP endpoint calls digital then forwarded by EC500 1

[dclark1111]

I have looked everywhere for this one, and I can't figure it out. In short, we are adding IP Phones (SIP) to our existing setup (SMGR,SM,CM) and are having a fun issue. When the IP phone user calls a digital station that has ec500, the person with EC500 has a messed up caller id. It is the calling station plus 1 and the area code. In this example station 67890 (Digital station) has EC500 forwarding to their cell phone (calling out using SIP). Station 12345 is the calling IP station. Station is defined in SM as Avaya SIP 12345 and the avaya E.164 +12223312345 in their Communication Address.
Call path:
Station 12345 -> SM -> CM digital -> station 67890 -> EC500 cell phone (via ars) -> CM to SM SIP -> SM -> SBCE -> carrier
Cell phone receives call from +122212345 (+1, area code, 5 digit station id)

I did a trace on the SBC and see that SM is sending it the 5 digit extension to the SBCE. This tells me that I need to do something in SM, but have no idea where to look. I tried Digit Conversion for outgoing calls from SM in an Adaptation. Matching pattern was the 5 digits. Did delete 5 digits and insert on Origination with no luck there.

Has anyone came across this before? Can you point me in the right direction on where to look.

 

[dclark1111]

All, We found the fix to be a signal group setting. We had IMS Enabled set to Y. This was causing us a disaster. Turning IMS to No was the fix.
Thanks all who put a thought on it.

 

[DAVIDPAYNE]

Gave you a Star for the follow up.