No Sound on RingGroup/Voicemail only on external Calls (via SIP-Trunk)

(Egfy123) #1


i have a strange Problem.
My basic Setup is: SIP-Trunk(FritzBox) -> InboundRule -> RingGroup -> VMBlasting
For internal Calls it works perfectly as expected. But for an external Call via the SIP-Trunk, there is no sound by the RingGroup/VoiceMail Announcements. If the Call was answered, everything is OK. But the Beep, recorded or Numer Announcements are muted.
If I change the setup as following; SIP-Trunk(FritzBox) -> InboundRule -> Extension -> Voicemail everything worked fine, also with the VM. All Announcements are loud and clear :slight_smile: Unfortunately this is not my favorite Setup…

The Logs for the three Cases are by Pastebin: h t t p s://

I use the following Software-Versions on an clean (Proxmox) Installation:
PBX Version:

PBX Distro:

Asterisk Version:

Can anyone help by resolving this issue?! I spend two Days by solveing this issue an i have no more Ideas :frowning:



Try enabling fax detection for a test. I had the same issue and this fixed it. I think it has something to do with the system “answering” the line before ringing the phones.

(Egfy123) #3

You are GENIUS - thats solved my Problem :slight_smile: I`m sooo happy - thank you :slight_smile:

(Itzik) #4

Is that’s the case, then you can simply force the channel to answer on the inbound route. Fax detection may delay the incoming call, depending on your routing logic.


Yeah you’re right ! I forgot about this option.

(system) closed #6

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