I am sure people have run into this before with their Firewall and NAT setup I am trying to see what ports and ranges I specifically need to open to avoid this error? I am using a variety of SIP clients one of which is the Cisco 7940G phone, another is my Cell phone PDA running SJLabs SIP client. I can place calls inbound to my Cisco 7940 but not outbound to my cell, this SIP ALG error I believe is the reason. Need help!!