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How to troubleshoot one-way and no-way audio on VoIP …
http://info.teledynamics.com/blog/how-to-troubleshoot-one-way-and-no-way-audio-on-voip-calls
For more details on how to resolve NAT-related audio issues, see our article on how to resolve one-way or no-way audio on VoIP calls. (2) Firewall. If specific ports within the RTP range are being blocked by the firewall, then the voice stream will be impeded. A solution to such a problem is to implement a second- or third- generation firewall ...
No audio on incoming VoIP - Spiceworks
https://community.spiceworks.com/topic/2106218-no-audio-on-incoming-voip
Outbound audio does not use the same port as inbound audio. I had a client that had a problem ~50% of the time with one-way audio, mostly on incoming audio. Found out that with the latest update of our phone server (new patch) there were 50% more ports that we needed to open on the firewall. That fixed it.
How to resolve one-way or no-way audio on VoIP calls
http://info.teledynamics.com/blog/how-to-resolve-one-way-or-no-way-audio-on-voip-calls
Another symptom is when the one-way or no-way audio only occurs on incoming calls, but not on outgoing calls or internal calls to other extensions on the same network. Yet another clue could be if the audio works fine on internal calls within a single location, but not on internal calls with extensions at another location, even though it is ...
The causes of No-Audio and One-Way-Audio VoIP Calls ...
https://blog.kolmisoft.com/the-causes-of-no-audio-and-one-way-audio-voip-calls/
NAT is a common cause of one-way and no-way audio on VoIP calls. Best practices have been written up in an RFC to define NAT traversal for SIP-based voice communications. Double NATing: when a device is under double NAT. This can work if configured properly for the internet, but for the audio it introduces more variables and creates unecessary ...
Solved: No Inbound audio T1 PRI to VoIP - Cisco Community
https://community.cisco.com/t5/ip-telephony-and-phones/no-inbound-audio-t1-pri-to-voip/td-p/2114062
When call inbound calls arrive from the PRI the call is routed to the proper IP phone but no audio is heard. Audio works from the VoIP phone to the PSTN side. My T1 controller counters are clean and isdn status is MULTIPLE_FRAME_ESTABLISHED. This is a new install so my dial plan is simple: dial-peer voice 20 pots. destination-pattern 9.T.
Incoming Calls not Working - VoIP.ms Wiki
https://wiki.voip.ms/article/Incoming_Calls_not_Working
If you have not yet configured your device, this will be your next step so that incoming calls as well as outgoing calls start working with our service. * For softphone configurations, click here. * For ATA and IP phones configurations, click here. * For PBX servers and the like, click here.
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