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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
122
ISDN Trunk connection (Primary Rate)
Physical Connectors
Basic Rate User network Interface
Primary Rate User network Interface (E1/T1)
Max. 1000 meters
GDK System
ISDN Board
PRIB
DSU
ISDN
Figure 3.5.7.d
ISDN Trunk connection (Primary Rate Interface)
1. Point to Point connection only
2. Without power feed.
3. Line Impedance: 120 ohm
Repeater
Figure 3.5.7.e
RJ-45 Type Jack
1 2 3 4 5 6 7 8
ISO 8877
ITU-T Rec. I.430
Contact
1
2
3
4
5
6
7
8
TE
Power Source 3
Power Source 3
Transmit
Receive
Receive
Transmit
Power Source 2
Power Source 2
NT
Power Source 3
Power Source 3
Receive
Transmit
Transmit
Receive
Power Source 2
Power Source 2
Polarity
+
-
+
+
-
-
-
+
Table 3.5.7.a
Contact assignments
Figure 3.5.7.f
RJ-45 Type Jack
1 2 3 4 5 6 7 8
ISO 10173
ANSI T1.408
Contact
1
2
3
4
5
6
7
8
TE
Receive
Receive
Shield(R) *
Transmit
Transmit
Shield(T) *
Power Source *
Power Source *
NT
Transmit
Transmit
Shield(T) *
Receive
Receive
Shield(R) *
Power Source *
Power Source *
Polarity
-
+
Table 3.5.7.b
Contact assignments
* Optional