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IAX Calls - One Way Audio - narkive
https://asterisk-users.digium.narkive.com/xiZnxo04/iax-calls-one-way-audio
one way audio. This only happens for inbound calls off the PSTN, if Call comes in from PSTN to site A, gets put into a queue to be answered by receptionist as site B. Receptionist answers the call, and then puts the call on hold to perform an attended transfer to an extension at site A. (The call from the receptionist to the extension is OK).
[SOLVED] No audio one way - FreePBX - both ZAP & IAX ...
https://community.spiceworks.com/topic/1592720-no-audio-one-way-freepbx-both-zap-iax
I have had one-way audio problems in the past with true SIP trunks and am aware of the various causes for those. Hence the reason for identifying these as ZAP and IAX in the OP title so that people did not jump to conclusions about this being a SIP problem. My apologies for the confusion in the original post however.
One way audio on an IAX2 trunk - MangoLassi
https://mangolassi.it/topic/9167/one-way-audio-on-an-iax2-trunk
The person on PBX A cannot hear the person on PBX B. PBX B calls to PBX A and both parties have 2 way audio normally. PBX B also has an IAX2 trunk to PBX C and PBX D. All calls work perfectly for those. Here is a test call from PBX A (ext 220) to PBX B (ext 103) where PBX A cannot hear PBX B.
SIP - No audio or one way audio - Zoiper
https://www.zoiper.com/en/support/answer/for/ios/19/SIP_-_No_audio_or_one_way_audio
SIP - No audio or one way audio ( on Ios ) SIP - No audio or one way audio. In case you are experiencing no audio or one way audio issue, please make sure that Zoiper is allowed to use the microphone on your device. Open iPhone's "Settings"->"Privacy" and allow Zoiper to use the microphone. If the microphone is enabled, but still there is one-way audio, or no audio at all, …
SIP - No audio or one way audio - Zoiper
https://www.zoiper.com/en/support/answer/for/android/11/SIP_-_No_audio_or_one_way_audio
Other causes for the missing audio issue are: A limitation issued by your provider: Your provider could be filtering or altering the network packets. It is possible to bypass the restrictions by using IAX, TCP/TLS, non standard ports or VPN tunnels, depending on the way of blocking. Any of these would require support on the server side.
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