Feb 24, 2024 · You could set their modem/router to bridge mode and use your own router. Then set your router to disable SIP/ALG. You could access their modem/router menu > firewall settings > set security to LOW (SIP ALG is a hidden feature that gets turned on automatically under other levels of security)

Apr 2, 2021 · "SIP ALG modifies SIP packets in unexpected ways, corrupting them and making them unreadable. This can give customers unexpected behavior, such as phones not registering and incoming calls failing. SIP ALG modifies voice and fax packets to make them appear as if they have a public IP address and are not behind a firewall.

Apr 8, 2020 · I need to Disable "SIP ALG" in my Comcast provided Arris TG1682G Router/Modem. I do not see an option to disable this when attaching to the admin/web console of the modem using 10.0.0.1.

Jan 5, 2021 · @user_ed6eb2 - I am curious if you would have a link to the SIP ALG test that was used by your wife's employer. I have tried a couple to troubleshoot a VOIP issue on my home network, but both tests come back negative saying that SIP ALG is not detected. So perhaps I have a false-negative. If you could provide a link it would be appreciated.

Dec 31, 2021 · @user_21cae6 Thank you for that information. It doesn't look like there is an option to disable it. You may need to put the modem into bridge mode and purchase your own modem for that specific setting.

Sep 28, 2023 · How do I disable the setting SIP ALG? How can I set a static IP for a local device, such as a homelab server or printer? I have admin access to our Xfinity router's web interface and mobile app. A point in the right direction to these settings would be great. Thanks, all!

Aug 23, 2024 · I stopped receiving incoming calls on my magic jack which is plugged into my xfinity gateway router. Magic Jack says I need to disable SIP ALG in my router settings, which I cannot locate anywhere and do not believe is possible.

May 1, 2023 · Its common knowledge in the IT world for any VOIP technician to know that SIP ALG causes mutliple problems with VOIP phones losing registration or not registering at all. Xfinity is now handing out the new XB8 cable modem. This modem does NOT have an option to disable SIP ALG which is leading to a large number of users not being able to work at ...

Apr 16, 2024 · You could access their modem/router menu > firewall settings > set security to LOW (SIP ALG is a hidden feature that gets turned on automatically under other levels of security) You could also access advanced security and flag your phone/device as an IP phone.

Dec 1, 2020 · A lot of WiFi routers implement something called SIP ALG (the included link below explains what this is), and it is on by default. The issue is that it's usually poorly implemented or cannot handle a lot of SIP connections.