Technical concepts are often different from Marketing terms. At my last company we used the term "SIP Trunking" to refer to configured SIP connectivity to an end customer's equipment, generally limited by a network element to a specific number of maximum concurrent calls with one form or another of flat-rate pricing. "Virtual PRI" is a good analogy. We used the term "O&T" (Origination and Termination) to refer to wholesale SIP arrangements to another carrier/large customer's switch that was metered (pay for all calls) and was not limited (by anything other than available bandwidth and upstream PSTN trunks) in terms of concurrency. This would equate to carrier SS7 and ISUP trunks in the PSTN. Perhaps a good analogy is "Peering" vs. "Transport" or "Transport" vs. "Internet Access" in the IP connectivity world. They are all just pipes for moving packets but they come with different agreements and pricing, often due to the "size" of the deal, and they are often provisioned very differently from a technical/facilities standpoint. -Scott -----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of Ric Messier Sent: Wednesday, August 05, 2009 10:05 AM To: Alex Balashov Cc: voiceops at voiceops.org Subject: Re: [VoiceOps] GLBX soft switch On Wed, 5 Aug 2009, Alex Balashov wrote:
SIP trunking simply refers to a static arrangement of IP endpoints for the
purpose of setting up multiple sessions between them in order to pass traffic. It can either be access (for a customer) or traffic of an intra-industrial nature, such as private SIP peering between carriers or ITSPs.
I'm familiar with what SIP trunking is. You're right that it's imprecise. However, the carrier/service provider I used to work for did make a distinction, as I recall. Ultimately, the mechanism is the same or at least similar (different facilities may be used). Ric _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops