I am connecting one of my sister's company G3R PBX to my CMS. I am going thru a pair of firewalls and the WAN. I am able to ping the PBX from CMS and CMS from the PBX but can't get the CMS link up. I did some snooping and found out that all my PBXs have traffic on port 5001 (this is the listening port for the CLAN) but on the PBX from my sister company the traffic keeps resetting. I think this port is not enable or defined. Any one knows how to check on this?