156 / ISDN PRI and BRIModular ICS 4.0 System Coordinator Guide P0881591 Issue 01The dialing plan configured by your customer servicerepresentative determines how calls are routed.Consult your customer service representative to determinewhether or not this feature is compatible with your serviceprovider.Call by Call service selection for PRIPRI lines can be dynamically allocated to different servicetypes with the Call by Call feature. PRI lines do not have to bepre-allocated to a given service type.Call types that may be available, depending on your serviceprovider are:PublicPublic calls connect your Norstar set with a Central Office(CO). DID and DOD calls are supported.PrivatePrivate calls connect your Norstar set with a Virtual PrivateNetwork. DID and DOD calls are supported. A private dialingplan may be used.TieTie lines are private incoming and outgoing lines that connectPrivate Branch Exchanges (PBX) such as Norstar.FX (Foreign Exchange)FX calls connect your Norstar set to a remote CO. It providesthe equivalent of local service at the distant exchange.
