The problem is when we try to register Cisco SPA525G2 softswitch TSIP, we get the message: "407 Proxy Authentication Required"
Sombody could advise how to configure 525G2 to send proxy auth.?
Thank you very much.
Please check the credentials you have entered.
You can see the proxy settings uder the extension tab on web interface of the phone.
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You are already sending the proxy authentication. Check the settings on the server and if the proxy is correct, also the username and the password.
I saw the traffic by wireshark. No proxy-authorization/authentification sentence in SIP header. See screenshort one from 525G2 other from Softphone. With softphone registration is ok.
Are you using the same network settings on the PC and the phone? Could you post some debugs from the phone?