"URL" Dialing: Calling arbitrary SIP places on the Internet
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by 
Mark Lindsey
Mark Lindsey
BroadWorks calls it "URL Dialing": calling from your hosted PBX VoIP phone or SIP Trunking device to a random SIP URI. Lately, Polycom has been handing out SIP URIs and inviting people to test out their video bridges. Let's say you want to call to sip:1234@opensips.org -- how should it work? Most VoIP services providers -- such as those built on BroadWorks and Metaswitch -- don't allow calls fr...