Replace Device or Bridge it to a compatible router.
The router feature of this device lacks the ability to disable SIP ALG and is not compatible with VoIP. We recommend that it be replaced with a standalone modem and router that is compatible, or that it be bridged to a router is compatible. We DO NOT recommend placing a phone on the DMZ of this device as it would compromise the security of the phone.
**All routers and firewalls need to have the correct ports forwarded and Whitelisting configured for VOIP service, please click here for more information.