I have a situation where all calls going out a specific SIP trunk are having all caller ID masked as 703XXXXXXXXXX. (Not happening on other trunks.)
It is not an External Phone Number Mask.
It is not a translation pattern, or a field on the Route Pattern
It is not a calling party transformation pattern.
It is not a Normalization Script on the Trunk or on the SIP Profile
It is not a "Caller ID DN" on the SIP Trunk. (In v12.5 the field is "Presentation Number")
The Remote-Party-ID and Asserted-Identity fields on the SIP Trunk are at their default.
None of the related fields are set at the Device Pool.
There is no listing in the Route Plan Report with the 703XXXXXXXXXX
The Dialed Number Analyzer shows the change in the caller ID, but not why the caller ID is being masked.
I can't figure out where this is coming from.
The trace file shows the call coming through the normal process of Incoming Call - Route Pattern - Route List - Route Group - SIP Trunk with all of the normal processing I would expect in a call. BUT... right before CUCM signals out via SIP to the CUBE there is this line in the trace file: