Configure SIP ALG on your ZyXEL C3000Z modem

SIP ALG enables or disables the ability to pass SIP sessions to the LAN.
Modem Advanced Step 1-3

1.  Connect a device, such as a computer or tablet, directly to your modem using the Ethernet cable (usually yellow).

2.  Open a web browser and type http://192.168.0.1 into the web address field.

3.  Log in to your modem's settings (Modem GUI) using the Administrator Username and Password, then select "Apply." Unless you have changed the default settings, you can find the login information on the modem's sticker.

Learn more about password security best practices.

4.  Select "Advanced Setup."

  1. Select "SIP ALG."
  1. From here you can view or edit the "SIP ALG" settings.
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