On Tue, 2009-08-04 at 10:53 +0530, Ujjwal SIngh wrote:
> What does
> 
> "SIP/2.0 487 LR2 - User not registered on this client means."
> 
> I am getting this error from a server when I send an INVITE to the server.

Some SIP systems will not accept INVITEs from phones that are not
registered with the system.  This is not a requirement of SIP, but it
appears that your system enforces this requirement.

In regard to the specific "487" response, its purpose is to report that
the processing of a request was terminated by a CANCEL.  So it appears
that that response code is being used incorrectly here.

Dale


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