Example VoIP SIP message flow for REGISTER, INVITE and BYE using the OpenSER outbound proxy. Focus is on the transport address in SIP and SDP/RTP. «read more»
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Examples of typical event sequences for SIP phone registering or placing/receiving a call. Both with route-able IP address (without NAT), and with private IP address (with Network Address Translation). «read more» Paying any amount for a mostly idle land line phone seems excessive. Especially when knowing that good alternatives are available. The introduction to this article is shamelessly based on section 8 of Unlimited free calling with Google Voice. «read more» |
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