asterisk users - Feb 2008 - Asterisk does not handle INVITE authentication by Proxy

Hi,

   I have used asterisk 1.4.17 to interwork with a SIP Proxy. Asterisk acts
as a UAC and registers three users with the SIP proxy. It handles the proxy
authentication for register requests well and all three users get registered
with the SIP Proxy. However when the Proxy challenges the INVITE sent by
asterisk, asterisk is unable to use the credentials for each of those users.
If I use 'auth' parameter for different users for the same domain then
it
just picks up the first user credentials defined in 'auth=' lines in
sip.conf. Is this an asterisk limitation or am I missing something here?

Regards,

Mayur 

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