Disable SIP ALG on CM500

[tiweintraub]

Hello:  I am trying to disable SIP ALG on my CM500-100NAS Cable Modem.  I am arunning v1.01.14 Firmware.  Under the advanced tab, I don't have the options to go to SETUP-WAN SETUP and disable SIP.  What am I missing here?  I am using Comcast/Xfinity as an internet provider.  Is this something that Comcast needs to turn off?  Thanks for the advice.

[plemans]

What you're missing?

The CM500 is a modem only. It isn't a router. 

There's no disabling it on a modem. 

Maybe on a modem/router combo device but not strictly a modem.