Direct incoming calls SRV problem - alternative solution
DracoFelis has written this article on accepting incoming SIP calls direct to your SIP device:
"How to accept direct inbound calls to your LinkSys/Sipura adapter, bypassing all VoIP providers." SIP Broker Wiki : Inbound Calls Directly to your LinkSys or Sipura The method involved uses the SIP URI: sip:userid@dyamic_dns_address However, as described in the article, this won't work with some SIP proxies that require an SRV record. The solution presented is to use a SipBroker alias, so that the incoming call comes in via SipBroker. (The sipbroker.com SIP proxy happily uses an A record if there is no SRV record.) I've been reading through RFC 3261 (SIP), and the referred-to RFC 3263 (locating SIP servers), and I think I've found an alternative solution: Instead of using the SIP URI: sip:userid@dyamic_dns_address use this SIP URI: sip:userid@dyamic_dns_address:5060 From RFC 3263: Quote:
This solution, I think, could be more reliable than going via the sipbroker.com proxy, which introduces a further point of potential failure (such as the "lr=on" problem). |
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