voip interop testing made easy?

I’d be interested in chatting to anyone out there who has to periodically does voip interop testing to certify equipment after a firmware upgrade. You may be an IP telephony handset manufacturer or a vendor of other equipment that needs to be certified against an operator’s platform or network.

This could be the subject of a future trefor.net workshop. The whole process, which has traditionally been quite expensive because of the time it took to perform manual testing of sometimes hundreds of features is ripe for automation.

If you use a voip call simulator such as Dory this is fairly straightforward but I wouldn’t mind hearing how others do it.