SIP/2.0 407 Proxy Authentication Required
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The 407 Proxy Authentication Required response indicates that the phone must first authenticate itself with the proxy server. If received by phone, the phone may repeat the INVITE request with a suitable Proxy-Authorization field. This field should contain the authentication information of the user agent for the next outbound proxy or gateway.
Solutions
- Make sure username/password are correct
- Make sure you used username instead of user on the far server (e.g. other Asterisk servers) describing peer
Proxy Server to UA Authentication Call Flow
Check also:
