Connecting Rbsu To Network Side (Te-Mode) - Toshiba strata CT Installation & Maintenance Manual

ISDN Interfaces
RJ45 Jack – ISDN Standard Interface Modular Connector Pinout (RBSU-NT
Table 10-8
mode)
Pin
1
2
3
4
5
6
7
8
Notes
G

Connecting RBSU to Network Side (TE-Mode)

H
The RBSU only, not the RBSS, circuits can be connected to the network side of a BRI line.
The RBSU circuits must be configured in the TE-mode (refer to option switches in
5 on Page 10-13
In the U.K., the BRI line from the ISDN service provider is a two-wire U-type BRI line. This
line connects to the RBSU TE circuit via NT1 as shown in
necessary to convert the network BRI, two-wire, U interface to the RBSU BRI, four-wire, T
interface.
C
The connection between the NT1 and the RBSU TE circuit is a point-to-point connection, so
the NT1 can connect to only one RBSU BRI TE circuit.
A 100-ohm Terminating Resistor (TR) is required on each end of the point-to-point
connection. The TR must be switched into the RBSU TE circuit (refer to option switches in
Table 10-5 on Page
Most NT devices have TR option switches, but you can use those supplied on the card. Refer
to the NT manufacturers documentation for the maximum loop length between the NT1 and
the network jack. The maximum loop length between the NT and the RBSU circuit is 400
metres using CW1308 or 800 metres using CW1700/1750 or equiv.
10-18
Colour
White/Blue
Blue/White
White/Green
Green/White
Pins are numbered left to right when looking into the jack cavity with the locking tab
down.
and Program *60).
10-13) and off at the NT1 or vice-versa.
Name
T2 (not used)
R2 (not used)
R3 RX+
R1 TX+
T1 TX-
T3 RX-
T4 (not used)
R4 (not used)
Function
Figure 10-12. The NT1 is
Strata CT I&M Manual October 2000
Table 10-