To: RocketMan who wrote (2669 ) 3/14/1999 6:57:00 PM From: Frank A. Coluccio Read Replies (3) | Respond to of 30916
RocketMan, surely, I'll give it a try. I addressed part of this in my last message here. The Excel or others like it that have been properly modified with IP Routing on the back end, along with the necessary gateway and other VoIP software, will be used as a transition platform. The SP will thus be able to address both the old PSTN world, and the new packet world of VoIP. Certain ports on the switch will point to the SS7 controlled network (the legacy way), others will point to an private IP backbone (the bypass way), and still others will point to IP links that have been substituted for intermachine trunks on the public PSTN (in lieu of the legacy way trunks). This last group will be governable under SS7 call set up and tear down procedures, but it will still enjoy the economies associated with IP. CISCO has done this with the Summa Four. I believe Excel has partnered with at least one of the VoIPs to this end. If I'm not mistaken, it was with VocalTec, most recently, but I'm not so sure how far they've taken it. It might be interesting to note that in the winter of '97-'98 I interviewed both SUMA and XLSW on this matter, and neither could address my questions with anything substantive, since neither at that time had taken this approach seriously yet. Internet Time is for real. techweb.com This would be a classical means of doing traditional telephony over an IP backbone. It does not, however, address Internet Telephony from a purist's perspective. That is, it does not deal with pure IP constructs, rather it mimics the PSTN as we now know it. This is the way that most VoIP ITSPs are headed, since "pure" Internet Telephony is still in its very early stages of conceptualization (at least with respect to where it would be of any use on a global scale). What the ITSPs are doing now, for the most part, is emulating most of the features that are now available through the PSTN, only they are using the more efficient transport characteristics of the Internet protocol and compression, as opposed to switched links and pulse code modulation at the 64 kb/s level on the intermediate routes between switching entities. And most continue to use the existing LEC POTS facilities for origination and termination of calls. Regards, Frank_C.