Toshiba STRATA CTX100 Installation And Maintenance Manual page 207

A cord of up to 10 meters connects the ISDN BRI RJ45 wall jack to the desktop TE-1 or TA RJ45
jack. Bellcore recommends that all TE-1 and TA devices be attached with the same standard cord
to ensure compatibility.
Figure 5-13 Modular ISDN Data Cable
The standard pinouts for ISDN jacks is the TIA-568A or TIA-568B jack as listed in
variants A and B to the TIA specification are electrically the same, only the wire colors are
different. However, you should only use one type TIA jack in a customer installation because
mixing the two may cause certain wire pairs to be swapped which would result in line faults.
Table 5-7 TIA-568B (RJ45) Jack – ISDN Standard Interface Modular Connector Pinout (RBSU-NT mode)
Pin
1 Green
2 Green/White
3 Orange/White
4 Blue/White
5 Blue
6 Orange
7 Brown
8 Brown/White
Notes
Pins are numbered left to right when looking into the jack cavity with the locking tab down.
•
TIA-568A swaps pair two with pair three, changing only the color of the wires on the pins.
•
Electrical performance is the same.
Strata CTX I&M 10/02
3039
Four-pair Wire
Color Name
T2 Power 3 (not used on RBSU/RBSS)
R2 Power 3 (not used on RBSU/RBSS)
R3 RX+
R1 TX+
T1 TX-
T3 RX-
T4 - Power 2 (not used on RBSU/RBSS)
R4 + Power 2 (not used on RBSU/RBSS)
Locking Tab
RJ-45
Eight-pole Plug
Function
ISDN Interfaces
RBSU/RBSS Interface Units
Table 5-7. The
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