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How to troubleshoot common VoIP issues? | SonicWall
https://www.sonicwall.com/support/knowledge-base/how-to-troubleshoot-common-voip-issues/170503552140480/
Using a Sonicwall with VoIP - voipmechanic.com
https://www.voipmechanic.com/sonicwall-voip.htm
The SonicWall does provide a "Consistent NAT" option to help resolve this issue, but this does not correct the fact that port numbers are actually changed. 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
One way audio with VOIP - Spiceworks
https://community.spiceworks.com/topic/1836961-one-way-audio-with-voip
One way audio is usually a firewall issue and a separate pipe wouldn't help if that's the case. If it's all users, is sip transformations enabled or disabled on the sonicwall? 1 · · · Jalapeno OP claudeklod Sep 20, 2016 at 22:27 UTC All ports between 8000 and 64000 need to be open. Those are rough numbers but VIP runs in those high ports.
Recommended Settings on a Sonicwall for Digital Voice ...
https://support.itel.com/hc/en-us/articles/202827745-Recommended-Settings-on-a-Sonicwall-for-Digital-Voice
In the VOIP Section, make certain that "Enable Consistent Nat" is checked. Under firewall settings, disable SPI (Stateful Packet Inspection) Under Firewall Settings, Advanced, set UDP Timeout to 350 seconds If you are not receiving any 'ringback' when dialing out the Sonicwall may be blocking the ringback tone.
nat - SIP Trunk for VOIP behind a SonicWALL - Server Fault
https://serverfault.com/questions/672840/sip-trunk-for-voip-behind-a-sonicwall
Make sure it support sip alg and make sure you are using standard sip port (5060) or change the sip alg to "monitor" the sip port you are using. 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.
How to solve VoIP one way audio- step by step.
https://www.voipmechanic.com/voip-one-way-audio.htm
The first step in one way audio troubleshooting is to simplyfy the connections. This allows you to identify the actual cause of the VoIP one-way audio. Do the following: Connect the VoIP ATA, IP Phone, or PC with softphone directly to the modem device. Make sure you get registered and obtain a valid IP address.
What Causes VoIP One-Way Audio? - PathSolutions
https://www.pathsolutions.com/resources/what-causes-voip-one-way-audio/
One-way audio in a VoIP environment can be frustrating, as one caller can hear everything fine, but the other caller hears nothing. One-way audio can occur at the beginning of a call, or mid-way through an existing call. Here are the causes of one-way audio, listed in priority order: Firewall misconfiguration.
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 ...
One Way Audio on Internal Calls - Avaya: IP Office - Tek-Tips
https://www.tek-tips.com/viewthread.cfm?qid=1785212
One Way Audio on Internal Calls. IP Office 10.0.3. We deployed 3 9611 phones at a remote location over a SonicWall VPN. Everything works fine on external calls and internal calls from a remote extension to another remote extension. When a remote extension calls an extension at the main site, the remote side cannot cannot hear the extension at ...
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