International Interworking Support This topic has 0 replies, 1 voice, and was last updated 16 years, 11 months ago by Bridget. Viewing 1 post (of 1 total) Author Posts 20th April 2006 at 13:47 #44860 BridgetGuest …looking for interoperability experience with use of SS7 interworking among international PSTN carriers/equipment. Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.