Obtaining a call's number verification result describes the normal process by which the IP Office system normally obtains a call's verification result from its headers. However, if required, the IP Office can look for the verstat value in another specified header.
As per normal operation, if verstat values are present in more than one header, only the first is used.
Procedure
Open the SIP line's settings and select SIP Engineering.
Click Add and enter one of the following custom strings:
To specify the header to check, enter SLIC_STIR_ATTEST="W" where W is the name of the header used by the ITSP.
For example, SLIC_STIR_ATTEST="X-StirResult" instructs the IP Office to also check for a value in the X-StirResult header if present. .
