Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: Paul V Flynn Newsgroups: comp.dcom.telecom Subject: Re: GTD-5 and CLASS Message-ID: <8770@accuvax.nwu.edu> Date: 7 Jun 90 13:44:38 GMT Sender: news@accuvax.nwu.edu Organization: AT&T Bell Laboratories Lines: 38 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 419, Message 6 of 11 In article <8722@accuvax.nwu.edu> dcr0@gte.com (David Robbins) writes in response to article <8686@accuvax.nwu.edu>, by john@zygot.ati.com (John Higdon): >Your experimentation >has shown, quite convincingly, that GTE has not taken advantage of any >of the GTD-5's SS7 capabilities in your area. This is pure >speculation, but it may be that the GTE operating company has not >worked out any arrangement with Pac*Bell to interconnect the systems >with SS7 (perhaps they haven't even *thought* of doing that ??). I don't know how two local exchange carriers such as GTE and Pac*Bell interconnect their systems with Signaling System 7, but when interexchange carriers interconnect with local exchange carriers with SS7, SS7 Network Interconnect is required. One of the purposes of SS7 Network Interconnect is to perform gateway screening between the two signaling networks to control the kinds of SS7 messages one carrier can send into another carrier's network. That's necessary (among other reasons) to allay fears that one carrier could inadvertently bring down someone else's SS7 network. SS7 Network Interconnect trials began in the last half of 1989 and are continuing this year. I'm not directly involved with the SS7 Network Interconnect protocol or its deployment, but the last I heard, it won't be until 1992 that SS7 Network Interconnect is deployed widespread throughout the United States. It could be that GTE in the Bay Area must wait for SS7 Network Interconnect before it can interconnect with Pac*Bell. In the meantime, if they only have three switches in the area to interconnect with SS7, some of the CLASS services won't be very useful. If that is the case, John Higdon may be suffering from the fact that his local carrier only serves a small area surrounded by another carrier, rather from the fact that his local carrier is GTE. Paul Flynn