Hello,
In my 3CX I have a inbound rule to forward to an outside number (red) for calls to a certain number in my 3CX (green). But, when I call said number from fixed line, I hear a ringtone for the short time up until the 3CX actually forwards to the outside number (red). From there on, the external phone (red) rings, but the caller cannot hear a ringtone until the callee (red) hangs up or answers the phone. Everything else works fine, both can speak with each other after the phone is answered, it's just that the caller doesn't hear a ringtone while the forwarded phone (red) rings.
Strange enough, if the caller calls from mobile, no ringtone at all can be heard. But it doesnt matter if the forwarded outside number (red) is fixed line or mobile.
We use an unsupported SIP Provider in Germany, called Telekom Voice Data S and added every single Phonenumber as a single trunk. We tried anonymous register as well as authenticated register via email and password, but it didn't change anything.
Lastly we tried to change the outbound parameter settings according to (german source) https://service.swyx.net/hc/de/arti...ider-Deutsche-Telekom-VoiceData-Anschluss-DE- but that didn't help either.
We even captured traffic on our 3CX:
Red marks the outside mobile number, green the number of the PBX that should forward to the outside number.
Between both screenshots is only RTP traffic with the exact same payload, only interrupted of SDP pakets like paket #53 (183 Session Progress).
I let the phone ring for approx 10 secs, for those seconds the rtp stream continued until I hung up on the caller phone.
We assume, that there has to be something like a flag or a setting, that tells the telekom sip-provider to correctly forward the ringtone to the right number. But actually we don't know because voice is transferred when answered.
Anybody same issues like us?
In my 3CX I have a inbound rule to forward to an outside number (red) for calls to a certain number in my 3CX (green). But, when I call said number from fixed line, I hear a ringtone for the short time up until the 3CX actually forwards to the outside number (red). From there on, the external phone (red) rings, but the caller cannot hear a ringtone until the callee (red) hangs up or answers the phone. Everything else works fine, both can speak with each other after the phone is answered, it's just that the caller doesn't hear a ringtone while the forwarded phone (red) rings.
Strange enough, if the caller calls from mobile, no ringtone at all can be heard. But it doesnt matter if the forwarded outside number (red) is fixed line or mobile.
We use an unsupported SIP Provider in Germany, called Telekom Voice Data S and added every single Phonenumber as a single trunk. We tried anonymous register as well as authenticated register via email and password, but it didn't change anything.
Lastly we tried to change the outbound parameter settings according to (german source) https://service.swyx.net/hc/de/arti...ider-Deutsche-Telekom-VoiceData-Anschluss-DE- but that didn't help either.
We even captured traffic on our 3CX:
Red marks the outside mobile number, green the number of the PBX that should forward to the outside number.
Between both screenshots is only RTP traffic with the exact same payload, only interrupted of SDP pakets like paket #53 (183 Session Progress).
I let the phone ring for approx 10 secs, for those seconds the rtp stream continued until I hung up on the caller phone.
We assume, that there has to be something like a flag or a setting, that tells the telekom sip-provider to correctly forward the ringtone to the right number. But actually we don't know because voice is transferred when answered.
Anybody same issues like us?
