Knowledge BaseAudian Phone ArticlesHardwareNetworkingFirewalls/RoutersCommercial/Business Routers and FirewallsZyXelvoiceUpdated 6/20/2026ZyXel Router Configure SIP ALGDescription:This article will show you how to do the following:Enable SIP ALG settings on a ZyXel router/firewallMethods:For the ZyXel router, log in and navigate to the ALG Section (go to CONFIGURATION > Network > SIP > SIP Settings). Make it look like the screenshot.
