We have 3 port networks in the main location and 2 port networks on remote ESS switch. We are looking for a way to dial the same four digit number (our extensions are 4) that would ring the local helpdesk. Lets say 4444 would ring 5001-5005 if you were in the first port networks and 4444 would ring 6001-6005 if you were in the ESS port networks. Any clean way? The ranges of extensions in the two sets of port networks are distinct. There is also a time question, the main location is manned for 2 hours before the remote, could we have the remote Port Networks reach the 5001-5005 from 8-10 ESt and their 6001-6005 all other times?