![]() ![]() Reminder: depending on your environment and needs, you may also benefit from leaving this setting enabled. This release includes support for the following commands only: class-map type inspect, class type inspect, match protocol, and policy-map type inspect. SIP ALG is an acronym referring to certain features used in your VoIP system to provide you with flexible, reliable call services. In Winbox or Webfig, navigate to IP > Firewall > Service Ports Locate the SIP line and disable it (as below) Restart the router Restart the phones. For example, customers may report issues like incoming calls failing, or phones not registering at all. Enable/Disable SIP ALG, and click 'Apply' to save your changes. With SIP ALG (Application Layer Gateway) enabled, customers may experience issues with calls and conferencing apps due to SIP traffic being interrupted, while also heavily impacting the quality of VoIP apps and services. SIP ALG refers to a gateway tool that enables or disables the modem to pass SIP sessions to the local area network. SIP ALG may or may not work for Vilo 5 due to a chipset limitation. Session Initiation Protocol (SIP) is an Internet Engineering Task Force (IETF)-standard protocol for initiating, modifying, and terminating multimedia sessions over the Internet. ![]() Currently, this can be manually disabled/enabled in the Vilo ISP Portal for Vilo 5 (Wi-Fi 5) & Vilo 6 (Wi-Fi 6) respectively. Enable SIP ALG and RTSP ALG Since firmware version 3.8.5, we have made a page for ALG feature. Disabling this setting can help mitigate issues related to VoIP services. If a PE ( customer provider ) device is installed in your Demarc and you have no access to it, you may have to contact the ISP provider to disable SIP ALG. ![]()
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