174 / ISDN
Compact ICS 4.0 System Coordinator Guide
P0881596 Issue 02
Although an ISDN S-loop or LT-loop can support up to eight
devices, the loop has a limit of two B-channels. If both B-
channels are in use, other devices on that loop cannot make or
receive calls until a B-channel is available, or until both B-
channels are available in the case of a video terminal. Thus, the
number of terminals installed must take into account whether
you require dedicated access for the terminals on that loop.
Note: Norstar set features, other than Transfer and Call
Forward All Calls, are not available to ISDN terminals.
In addition, you cannot retrieve a parked call, or reach
a Direct-Dial set by using the Direct-Dial digit from an
ISDN terminal.
Line access from an ISDN terminal
ISDN terminals do not have line keys or intercom keys as do
Norstar telephones. To make an outgoing call from an ISDN
terminal, access an external line by entering a line pool code
or by using the ARS feature.
ISDN BRI features
Selected ISDN network features can be used from a Norstar
telephone. Your central office switch (ISDN network)
determines which features are available to you.
Network Name Display for BRI
Your Norstar system displays the name of an incoming call
when it is available from the service provider. Name
information can be displayed on a Norstar set but not on an
ISDN terminal. If the Calling Party Name has the status of
“private” it may be displayed as “Private name”. If the Calling
Party Name is unavailable it may be displayed as “Unknown
name”.
Your Norstar system displays the name of the called party on
an outgoing call, when it is provided by your service provider.
p0881596.book Page 174 Wednesday, November 18, 1998 4:50 PM
