Aastra Ascotel IntelliGate 2025 - Page 64

Ascotel IntelliGate 2025/2045/2065
64 System Interfaces Part 1
NT1: Network Terminal
SLG: Subscriber Line Group
U/T: ISDN reference point
AD2: Digital user-network interface AD2
S: User-network interface S
a/b: Analogue user-network interface a/b
Fig. 1.7: Several basic accesses in point-to-point configuration,without direct dial number
Note:
Do not connect any terminals between the NT1 and the PBX.
Point-to-Point Connection with Direct Dial
With direct dial the individual PBX subscribers can be reached directly via their
direct dial number.
NT1: Network Terminal
SLG: Subscriber Line Group
DDI: Direct dialling
U/T: ISDN reference point
AD2: Digital user-network interface AD2
S: User-network interface S
a/b: Analogue user-network interface
Fig. 1.8: Several basic accesses in point-to-point configuration, with direct dial number
SLG
403 03 10
"
"
U
U
U
T
T
T
AD2
S
a/b
PBX
NT1
NT1
NT1
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SLG with DDI
U
U
U
T
T
T
AD2
S
a/b
PBX
NT1
NT1
NT1
403 20 00
403 20 99
DD No.
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