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Correcting One-way Audio with a VoIP Call - Asterisk

    https://www.asteriskpbxsystems.com/troubleshoot-oneway-audio.html
    Follow these basic steps to isolate the cause of one-way audio: Connect the ATA/IAD or other SIP device directly to the first device on the LAN such as the modem. Check for normal... Try setting up port forwarding or IP tunneling. This …

Asterisk one way audio issue | DIDforSale

    https://www.didforsale.com/asterisk-one-way-audio-issue
    Are you having an audio issues in your Asterisk? Well it’s a common issue with PBX to have audio issues like one way audio or no audio. Sometimes only caller can hear remote party or remote party only can hear the caller. You must be wondering what causes this issue? This problem in audio is mainly because of the NAT issues.

SIP with NAT or Firewalls - Asterisk Guru

    http://asteriskguru.com/tutorials/sip_nat_oneway_or_no_audio_asterisk.html
    ->If the voip phone does not use STUN or another mechanism to detect its public ip (=the public ip of the nat firewall) and thus embeds this ip into the the invite message, then asterisk will try to send its RTP packets to the private ip, and this will be dropped by the routers, resulting in one way audio. (The caller wont hear a thing).

One way Audio on endpoint? - Asterisk Endpoints - Asterisk ...

    https://community.asterisk.org/t/one-way-audio-on-endpoint/73947
    CentOS 7 Asterisk 13.18.2 I have Asterisk Server with Static IP no NAT (Location A) I have a 3rd party company (Location B) connecting to my Asterisk Server. I have my endpoint (Location C) The 3rd party company can connect to my server and can see the ringing of the phone but they can’t hear me at location C. I can hear them and respond but they cant hear me. …

SIP Trunk, No NAT, One Way Audio - Asterisk Support ...

    https://community.asterisk.org/t/sip-trunk-no-nat-one-way-audio/33583
    Hi, Asterisk 1.6.2.11. SIP trunk from an operator. Outgoing call : signal is OK, audio is only one way. I can hear the distant person, but she can’t hear me. Networking : [IP Phone] ------- [Asterisk] ------- [VoIP Provider's Router] ------- [VoIP Provider's PABX] 192.168.4.107 eth0 : 192.168.4.1 eth1 : 37.1.1.1 37.1.1.2 212.39.140.250 pabx*CLI> sip show peers altitude-output …

How to setup your Asterisk PBX if you are behind a NAT ...

    https://my.gradwell.com/s/article/how-to-setup-your-asterisk-pbx-if-you-are-behind-a-nat-firewall
    Setting up the PBX. If your Asterisk PBX is behind a NAT firewall, i.e. the PBX has an IP such as 192.168.0.2 then you will need to perform additional configuration to allow Asterisk to route the SIP and RTP correctly. The NAT configuration can be found in the file /etc/asterisk/sip.conf, the relevant section that needs to be edited is ...

Pfsense and Asterisk….one-way audio problem with SIP ...

    https://forum.netgate.com/topic/465/pfsense-and-asterisk-one-way-audio-problem-with-sip
    This shows up on voicemail as well...Asterisk hangs up immediately as it cannot hear any audio. The inbound caller can hear me speaking. My thoughts are that this is the classic 'one-way audio over SIP' problem, which can be found on certain firewall types/configurations ie symmetric firewalls. The static port feature may be the way around this.

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 …

One way audio for sip etensions - General Help - FreePBX ...

    https://community.freepbx.org/t/one-way-audio-for-sip-etensions/7365
    I have an Asterisk@Home installation in my organization. I have had this installation for more than 3 years but never noticed this problem. There are 2 problems, but both seems to be related. My SIP extensions have one way audio. SIP extensions have one way audio; others can hear them but not vice-versa. No, this is not a problem with one desktop.

Solved - Intermittent one way audio - fixed with server ...

    https://www.3cx.com/community/threads/intermittent-one-way-audio-fixed-with-server-restart.62671/
    One way audio is predominately a network issue - for example SIP ALG or ports blocked on your network firewall. As this does not happen all the time this may not be the root cause, but it would be worth running the firewall checker on 3CX to see if it all checks out.

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