System interfaces
28
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
Point-to-Point Connection without Direct Dial
Without direct dialling in, only one call number is available. The individual internal us-
ers can only be reached indirectly via the number.
This variant is suitable above all for systems with primarily outgoing traffic.
NT1: Network Terminal
U/T: ISDN reference point
DSI: Digital user-network interfaces
BRI-S: ISDN terminal interface
FXS: Analogue terminal interface
Fig. 5 Several basic accesses with line group in point-to-point configuration, without direct dial
number
Note:
Do not connect any terminals between the NT1 and the communication server.
NT1
NT1
NT1
FXS
BRI-S
DSI
U
U
U
403 03 10
"
"
Commu-
nication
server
Line group
BRI-T
BRI-T
BRI-T
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