[SIPForum-discussion] General SIP Server Question

[Jerry Richards]

Hello All,

General question regarding a SIP phone configuration where the phone
communicates with a single SIP server.  Would you agree such a phone need
only configure the following two SIP server entities?

1) SIP Registrar (either IP-address or domain-name) to be used inside the
SIP messages for both registration and call-control.

2) SIP Proxy (either IP-address or domain-name) to only be used to identify
where SIP messages are sent.  Basically, this is an Outbound Proxy.

RFC 3261 uses Proxy and Outbound Proxy and Registrar as if there are three
entities, so I'm a bit confused.

Best Regards,
Jerry