This is a stupid problem that has been driving me nuts for months and decided I would finally look into it. I know this is not a VoIP question but it's the only forum that talks about telephony.
I've got a Nortel Norstar Modular ICS system. When we get an incoming call it doesn't ring on all the phones. Only certain ones. I managed to find a manual and it has something to do with the "Ringing Sets" option but not 100% sure as it didn't resolve the problem. any help you guy/girls can throw my way would be great.