Quote Originally Posted by stevech View Post
... Also, my ATA's ALG function is trying to send SIP packets out but the router log says it did not forward, apparently because the Grandstream's SIP packet is not formatted properly according to the Cradlepoint.
Keep alive packets from your ATA are sent to keep your router ports open, not VOIPo's. The ATA is sending a local request to your router, a local request (local IP, private IP, any IP starting with 192.16 cannot be forwarded, if local IP's forwarded to the internet you would be colliding with millions of routers worldwide. Your registration requests are getting forwarded because the ATA sends it thru your WAN IP address. As long as your ATA is keeping your routers ports open (or your router has built in VOIP logic), you are right, VOIPo's attempt to keep yours alive is unnecessary. But, they have more than just you to think about, thousands of VOIPo customers are benefiting from keep alive requests sent by VOIPo and it is not detrimental to routers that don't need the reminder. Albeit maybe a little unnerving seeing your logs fill up.