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nat - SIP Trunk for VOIP behind a SonicWALL - Server Fault
https://serverfault.com/questions/672840/sip-trunk-for-voip-behind-a-sonicwall
The rason for one way audio is because the firewall/router dosent know where to send the incoming udp messages/audio and thats why its getting dropped. If sip alg is enabled, it will keep track on phone calls and where to send the audio.
Using a Sonicwall with VoIP - voipmechanic.com
https://www.voipmechanic.com/sonicwall-voip.htm
Changing outbound port numbers will cause issues with the VoIP traffic. These issues can result in one-way audio and dropped calls. Some background about the SonicWall The SonicWall has a setting, SIP Transformations which transforms SIP messages between the LAN (trusted) and WAN/DMZ (untrusted).
SIP trunk - CUBE - one way audio - Cisco Community
https://community.cisco.com/t5/ip-telephony-and-phones/sip-trunk-cube-one-way-audio/td-p/2783599
SIP trunk - CUBE - one way audio Hi guys, I am having a problem deploying a new SIP trunk to a customer. The scenery is the following: ... I had a similar issue with Sonicwall, but mine was more of an issue with Expressway behind a Sonicwall. The jabber clients had one-way audio. I must have changed every possible SIP ALG setting in the sonic ...
One way audio with VOIP - Spiceworks
https://community.spiceworks.com/topic/1836961-one-way-audio-with-voip
SonicWalls always do one way audio. Worst firewall for VoIP that we've ever seen. Something like 50% of all VoIP issues are SonicWall related. Look for SIP-ALG, SW turns it on by default and this is what it is designed to do ... break SIP. Just disable it, should work immediately.
SIP Trunk Setup AND Sonicwall :-( - Avaya: IP ... - Tek-Tips
https://www.tek-tips.com/viewthread.cfm?qid=1704960
I know I am just missing one or two settings. Can someone please share with me the settings they used to allow the IP Office to use the SIP trunk through a Sonicwall. As well, what changes I would need to make on the IP Office or the Sonicwall. I am currently running IPO 6.1(22) and Sonicwall Firmware 5.8.1.8-57.
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