2N ISDN BRI GSM, Руководство пользователя

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2N - ISDN BRI GSM Enterprise Gateway
3.1. Point-to-Point Connection
The Point-to-Point (EuroISDN with DDI) configuration
interconnects directly one ISDN terminal (TE) with a network
terminal (NT) (see Fig. 17). This type is applied mainly where
PBXs are connected to the ISDN.
Fig. 17 - Point-to-Point Connection
3.2. Point-to-Multipoint Connection
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 Fig. 18.
Fig. 18 - Point-to-Multipoint Connection
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