[SIPForum-discussion] Query

Tue May 29 06:49:01 UTC 2007

The 1st statement itself is true. Registration meant to resolve the
name(ie, to convert AOR to FQDN). This is used to route the incoming
calls.

So u UAC is doing registration in order to receive the incoming call.

Refer the statement below which is a part of "SIP-A complete book" by
Alan B. Johnston.

"Registration is not

required to enable a user agent to use a proxy server for outgoing
calls. It is necessary,

however, for a user agent to register to receive incoming calls from
proxies

that serve that domain unless some non-SIP mechanism is used by the

location service to populate the SIP URIs and Contacts of end-points."

Regards,

Mohan

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of gurudatt balaji
Sent: Friday, May 25, 2007 9:46 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Query

Hi All,

Quick query........

When unregistered user, orginates a call ..

1. he able to originate without registering?

2. he registers first and then originates a call?

3. Anything else?

Which statement is TRUE.

Thanks

Reg

Balaji

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