SIP trunks are tested before delivery by The Voice of O365. Depending on the supplier, it will be checked whether extensive profiles require testing. In the SIP certification document you can see all tests that are possible.
The InteropTest can be done in different variants, which is determined by the available time for the tests. Contact sales@softapp-distribution.com for questions about Sip certification from your supplier.
SoftApp-distribution strives to support as many trunk suppliers as possible....