Hello everyone, I want Asterisk works as a SIP client of my SIP Proxy(running SER), so I add a register definition in sip.conf: register => user:secret:authuser@host:port/extension Now calls from SER can be handled well,But I can't call to SER , so I add a section in sip.conf like this: [mysipprovider-out] type=peer secret=password username=2345 host=sipserver.mysipprovider.com fromuser=2345 fromdomain=fwd.pulver.com nat=yes And now I can call to SER but When Asterisk receives calls from SER , It responses the calls with 407 (Proxy Authentication Required) because SER(and SER's UA) isn't a UA of Asterisk , they can't handles these 407 responses, and the calls failed. Can you tell me How I can have calls in both directions(out and in)? Thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20041029/2ecda23b/attachment.htm