Skype does not use SIP.
A test number that echos back anything you say could be a way to test.sip:echo@iptel.orgIt does not actually ring but works right away after I dial 456#
I have outbound routing 456 set to "ring" it.
There may not be many, especially since FreeWorldDialup lost its free aspect. There are other VoIP companies that permit SIP calling. None that I currently use.
Too bad VOIPo does not have test numbers ...
Suggestions:
sip:echo@in.voipo.com
sip:time@in.voipo.com
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