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2.3 Available ISDN BRI Extension
Configurations
You have to know the way of connection of your ISDN devices in order to configure
your
GSM gateway correctly. For information on your
2N BRI Enterprise / BRI Lite
®
ISDN type, check your ISDN extension provider's registration form or contact your
telephone network administrator.
Point-to-Point Configuration
The Point-to-Point (EuroISDN with DDI) configuration interconnects directly one ISDN
terminal (TE) and a network terminal (NT) (see the figure below). This type is applied
mainly where PBXs are connected to the ISDN.
Point-to-Multipoint Configuration
Point-to-Multipoint (EuroISDN with MSN) is another type of ISDN terminal
interconnection. Here the network terminal (NT) is interconnected with up to eight
ISDN terminals through a 4-wire passive bus as shown in the figure below.
