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Thanks grblades for reassuring me about the port requirements.<br />
Thanks both for the STUN server NAT traversal info. I've also heard back from the SIP server support confirming that it won't work if NAT is enabled.<br />
<br />
I propose to split the points evenly between you.
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Thanks grblades for reassuring me about the port requirements.
Thanks both for the STUN server NAT traversal info. I've also heard back from the SIP server support confirming that it won't work if NAT is enabled.

I propose to split the points evenly between you.

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I'm testing a SIP solution for a client and can barely get beyond first base. An answer to this simple question will help heaps:<br />
<br />
Does the DSL Router I'm using (Dlink DSL-G604T) have to specifically support SIP for it to allow pass thru of SIP traffic from LAN clients to public SIP servers? Or is it sufficient to open UDP port 5060? My router was firewall &amp;&nbsp;NAT enabled and port 5060 open for UDP, but registration of the SIP softphone client with the sip server fails. I can telnet to the SIP server on 5060, so something's getting through, but does that demonstrate that SIP should also work? Or do I need a new router?
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I'm testing a SIP solution for a client and can barely get beyond first base. An answer to this simple question will help heaps:

Does the DSL Router I'm using (Dlink DSL-G604T) have to specifically support SIP for it to allow pass thru of SIP traffic from LAN clients to public SIP servers? Or is it sufficient to open UDP port 5060? My router was firewall & NAT enabled and port 5060 open for UDP, but registration of the SIP softphone client with the sip server fails. I can telnet to the SIP server on 5060, so something's getting through, but does that demonstrate that SIP should also work? Or do I need a new router?

dsl router capabilities for SIP protocol

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).