Let’s simplify this otherwise somewhat complicated concept.
SIP Trunking is the mechanism used to connect phone lines into an organization’s business telephone system, and is emerging as a viable alternative to legacy (TDM PRI and analog lines). A SIP trunk is essentially a telephone line, or series of telephone lines and DID’s brought into the office over a broadband (Internet) connection. The SIP trunk is a viable option, although the technology is relatively new and still not that well understood by the carriers.
The problem with a SIP trunk, which must be addressed, is that since the telephone line is coming in via a broadband / Internet connection, the quality of the data line from the organization’s offices into the SIP providers premises is absolutely critical.
Digitcom has been researching SIP trunk providers, we have done 4 deployments so far (3 on Avaya IP Office, and 1 on Cisco Unified Communications Manager Express) including our own office, and have had excellent success. All of these deployments have been in Toronto. We’re finding it quite challenging finding reputable carriers although we’re making some progress. This is obviously a work in progress, so we’ll keep you posted.
For more thoughts on SIP trunking check this out:
http://www.avayablog.com/archives/2009/04/sip_trunking_is.php
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A SIP (Session Initiation Protocol) connection is a service offered by many ITSP (Internet Telephony Service Providers) that connects a company’s PBX to the existing telephone system infrastructure (PSTN) via Internet using the SIP VoIP standard.
SIP & Data Service Provider
http://www.smartsip.net/sip-trunking-data-services.htmlSIP Trunking for Data Services
http://www.smartsip.net/sip-trunking-data-services.htmlSmartsip data Services