Nortel Networks Modular ICS 4.0 - Manual (Page 168)

156 / ISDN PRI and BRI
Modular ICS 4.0 System Coordinator Guide P0881591 Issue 01
The dialing plan configured by your customer service
representative determines how calls are routed.
Consult your customer service representative to determine
whether or not this feature is compatible with your service
provider.
Call by Call service selection for PRI
PRI lines can be dynamically allocated to different service
types with the Call by Call feature. PRI lines do not have to be
pre-allocated to a given service type.
Call types that may be available, depending on your service
provider are:
Public
Public calls connect your Norstar set with a Central Office
(CO). DID and DOD calls are supported.
Private
Private calls connect your Norstar set with a Virtual Private
Network. DID and DOD calls are supported. A private dialing
plan may be used.
Tie
Tie lines are private incoming and outgoing lines that connect
Private Branch Exchanges (PBX) such as Norstar.
FX (Foreign Exchange)
FX calls connect your Norstar set to a remote CO. It provides
the equivalent of local service at the distant exchange.
p0881591.book Page 156 Wednesday, August 19, 1998 6:43 PM