I have a 7200-s and a 7400 Networked, VPN, works fine can send a DID to an extension on the other system, no problem.

I want calls at the 7200-s , if not answered to Overflow to the other system. I put the NEXT PORT setting to a Ring Group and get an error:

MENU TYPE Index ID Description
4.1.1. Tel Number 5001(P:433) 0x60 Invalid Device

I see the Special apps manual mentions to set up NETWORK STATION GROUPS, I thought that was the same as 4.1.1 Station Groups, but on the remote system. and can find nothing by NETWORK STATION GROUPS.

Any clue what I am missing.

Thanks
Steve