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User experiences one-way audio and cannot pass DTMF digits ...
https://community.cisco.com/t5/collaboration-voice-and-video/user-experiences-one-way-audio-and-cannot-pass-dtmf-digits-when/ta-p/3131815
Core Issue The user makes a call and hears announcement messages (for example, "enter your account number..."), but cannot pass Dual Tone Multifrequency (DTMF) digits. This symptom applies for both VoIP toll bypass and IP phone calls to
Solved: Debugging DTMF and/or One way Audio - ADTRAN ...
https://supportcommunity.adtran.com/t5/Total-Access-900-900e-Series/Debugging-DTMF-and-or-One-way-Audio/td-p/4313
Re: Debugging DTMF and/or One way Audio. No problem. If you want to debug out-of-band/RFC 2833 DTMF tones, use this command: "debug voice dsp voip 0/X channel verbose rfc2833" //where X is the DSP the call is on when you are in a 2 DSP unit. You will be able to see any out-of-band DTMF in the debug.
IVR causes one-way audio and ignores DTMF - General Help ...
https://community.freepbx.org/t/ivr-causes-one-way-audio-and-ignores-dtmf/3692
IVR causes one-way audio and ignores DTMF. General Help. alano. 2014-05-31 18:26:33 UTC #1. Weird problem. All was well 2 months ago. Only noticed the problem one month ago when one department of our business experienced increased call volumes. I have kept FreePBX up-to-date each time new module released.
How to solve VoIP one way audio- step by step.
https://www.voipmechanic.com/voip-one-way-audio.htm
Solve One Way Audio-Step by Step. One way audio where one side or one party can hear the other, but not reverse, is typically indicative of something stopping either the outbound or inbound audio from reaching the receiving party. One way audio can be caused by network issues; NAT (Network Address Translation) issues or firewalls, so finding the cause will require …
voip - Troubleshooting One Way Audio - Network Engineering ...
https://networkengineering.stackexchange.com/questions/10840/troubleshooting-one-way-audio
Because in some VoIP protocols signalling (setup of connection, but also DTMF tones) can be carried in separate session from voice payload. If the voice payload can't traverse both ways (and it's often the case with NAT/firewall gateways) you'll get one way audio, but the connection still will be made and can provide some additional services (like your tones).
One-Way Audio Issue in Skype for Business and AudioCodes
https://www.mirazon.com/one-way-audio-issue-in-skype-for-business-and-audiocodes/
While troubleshooting, the phone call was traced in entirety using hardware tools, syslog tools, and even wireshark-type tools. When the one-way audio would happen, it was discovered that the traffic between Intelepeer (ITSP) and AudioCodes (SBC) was still alive. Audio was good. DTMF was good. The leg was active.
Asterisk Debugging - Telephony Cards - Documentation
https://wiki.freepbx.org/display/PC/Asterisk+Debugging
DTMF issues; one-way audio issues; Below is a diagram of how dahdi_monitor is used: As seen in the diagram above, the result of audio recordings from dahdi_monitor will indicate from which direction the bad audio/issue is coming from. Establish a call that has an echo, noise, dtmf, or one-way audio problem 1.
Call quality issues - VoIP.ms Wiki
https://wiki.voip.ms/article/Call_quality_issues
One-way audio is caused when one side of the RTP stream is not setup or terminated correctly. RTP is the UDP media stream that carries the audio of a phone call on VoIP. Let's try with the following suggestions: From the account or sub account settings, select always NAT=Yes (this is the option recommended by VoIP.ms).
DTMF Issue with Mitel 3300 - Mitel Networks ... - Tek-Tips
https://www.tek-tips.com/viewthread.cfm?qid=1766554
The most common issue with MiCollab is people forgetting to add IP subnets to the trusted sites. This results in one way audio that appears as a DTMF issue when people are dialing into the server. Of course, none of this applies on a hosted solution but that was not revealed earlier on. Are you really unaware of this?
AudioCodes Quick Reference Guide
https://www.audiocodes.com/media/14274/audiocodes-quick-reference-guide-voice-quality-troubleshooting-for-session-border-controllers-sbcs-and-gateways.pdf
volume: For DTMF digits and other events representable as tones, this field describes the power level of the tone, expressed in dBm0 after dropping the sign. Power levels range from 0 to -63 dBm0. The range of valid DTMF is from 0 to -36 dBm0 (must accept); lower than -55 dBm0 must be rejected (TR-TSY-000181, ITU-T Q.24A).
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