Hi Is there any update here? I don't believe there is a problem with my phones. I have 2 of the exact same model and both worked for several years now with no issue. Swisscom has obviously changed something and I need help in how the phones must now be configured. Alternatively, if you could set things back like they were that would also fix the problem.
Hi and thanks for your response I tried the server you mentioned but the phone would not connect. Under "Local Phone Credentials" in my Swisscom router I see the following instructions: Your local SIP phone must be set up once with the phone credentials and connection settings. Please use the following setting parameters for this purpose. Please note that every SIP phone manufacturer uses different terminology and not all parameters need to be configured for every SIP phone. Authentication user name: Your authentication user name defined above Authentication password: Your password defined above Username: The internal phone number matching your phone credentials (e.g. 220) Display name: Your name Domain: 192.168.1.1 Proxy server address: 192.168.1.1 Proxy server port: 5060 Registration server: 192.168.1.1 Registration port: 5060 STUN server: No Outbound proxy address: 192.168.1.1 So I put fs1.ims.swisscom.ch as the SIP server, this did not work. I tried it as the SIP server with 192.168.1.1 as the outbound proxy, which the phone thought was working but I still could not make outbound calls. Having 192.168.1.1 as the SIP server with fs1 as the outbound proxy makes no sense since the fs1 server won't know how to get to 192.168.1.1 (though I did try it anyway, and it did not work). It's still not clear to me what settings I should be using. Thanks
I am using 3 VOIP phones connected directly to my Swisscom router (well, there is an unmanaged switch in-between): 2 Grandstream GXP2130 phones and one Cisco "dumb" VOIP phone. I've set these up 2 or 3 years ago using the SIP settings provided by the swisscom router and everything worked perfectly since then. The phones do not get automatic updates. About 1 or 2 months ago the Grandstream phones became unable to dial out. All phones can still receive calls without problem, voice is ok, etc. and the Cisco can still dial out without problem. But on the Grandstreams, now when you dial any number they instantly do a busy signal and the phone shows "NO RESPONSE" on the display. Given that I've changed nothing, and it is affecting both phones Swisscom must have changed something recently in their VOIP protocol. I don't know enough about this technology to troubleshoot it myself. Does anyone know anything about this? I tried calling support but they said they do not have support for VOIP beyond simple configuration checking on the router. Any support would be greatly appreciated.
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