For Avaya SIP phones, the TRUSTCERTS setting in the downloaded settings file indicates the name of the certificate that the phone should request from the file server. The default name is WebRootCA.pem.
If using the IP Office as the file server and auto-generated phone settings files, no further configuration is required. The certificate name is automatically set in the settings file and the IP Office automatically provides its own identity certificate in response to requests for that file.
If using an alternate file server then:
The setting file for the phones on the file server must have a TRUSTCERTS entry specifying the name of the certificate file the phones should request.
The matching certificate file must be placed onto the file server.
If the certificate to use is still the IP Office system's own certificate, it can be downloaded from the system using web manager as follow:
Downloading the IP Office certificate from an IP500 V2.
Downloading the IP Office certificate from a Linux based IP Office.
