Pair 1 - Toshiba STRATA CTX100 Installation And Maintenance Manual

ISDN Interfaces
RBUU/RBUS Interface Unit
The ISDN BRI-U wire pair is usually on the center pair of the Demarc jack, pins 3 and 4 on
•
RJ11 and pins 4 and 5 on RJ45. Typical demarc jack wiring is shown below:
Figure 5-25 Six-pin Modular Plug (RJ11)
Table 5-9 Quad Cable with RJ11 Demarc Coding
Figure 5-26 Eight-pin Modular Plug (RJ45)
5-28
RJ11 Demarc Jack
Conductor

Pair 1

Pair 2
RJ45 Demarc Jack
6
BLACK
5
RED
4
GREEN
3
YELLOW
2
1
4726
Color
Red
Green
Yellow
Black
WHITE-GREEN
1
GREEN
2
WHITE-ORANGE
3
BLUE
4
WHITE-BLUE
5
ORANGE
6
WHITE-BROWN
7
BROWN
8
4727
Pin Use
3 Line 1
4 Line 1
5 Line 2/Power
2 Line 2/Power
Strata CTX I&M 10/02