Modular Jack Pin Configurations - Toshiba STRATA CTX100 Installation And Maintenance Manual

ISDN Interfaces
RBSU/RBSS Interface Units
Install RBSU/RBSS PCBs into Cabinet
Step 6:
After setting the switches and jumpers and installing the plug-on PCBs as described in the
preceding paragraphs, the RBSU/RBSS PCBs can be installed in the appropriate cabinet slots.
Refer to RBSU/RBSS Capacity and Cabinet Slot Information on
RBSS is installed in the Strata CTX cabinet, the status LEDs and connecting jacks are positioned
as shown in
Table 5-5 RBSU/RBSS LED Indications
LED
BSY
TS
LOS
FS

Modular Jack Pin Configurations

BRI (S/T) Circuit Jack (TE or NT Mode)
The TBSU and RBSU/RBSS BRI circuit jack is a shielded RJ45 (8-pin modular) with Transmit
(Tx) and Receive (Rx) pin numbers as shown in
when the BRI circuit is configured with TBSU and RBSU/RBSS option switches for TE or NT
(Tables 5-4
Rx wires with polarity. (See
The position of the TBSU BRI and RBSU/RBSS circuit jacks are shown in
respectively.
Table 5-6 RJ45 Pins in the 8-pin Modular Jack
Pin
No.
1
2
3
4
5
6
7
8
5-16
Figure 5-12.
Circuit Busy
On – Any B-channel is in use.
Off – B-channels are idle.
Timing Source
Blinking On/Off – The RBSU is extracting the clock from the BRI line and is the
Primary synchronization circuit for ISDN and T1.
On – The RBSU is the secondary (backup) synchronization circuit for the ISDN
and T1.
Off – The RBSU is not used for ISDN or T1 synchronization.
Loss of Signal
On – Clock timing cannot be detected from the line.
Off – Normal condition.
Frame Alignment Alarm
On – Frame alignment cannot be established.
Off – Frame alignment is established.
and 5-12). If the R40S is installed on the RBSU, the PS-1 voltage is carried on the Tx/
Table 5-6).
TE NT PS1/R40S
Side Side Polarity
N/C N/C
N/C N/C
Tx Rx
Rx Tx
Rx Tx
Tx Rx
N/C N/C
N/C N/C
Indication
Figure 5-12. The Tx and Rx pin numbers change
N/C
N/C
+
+
-
87654321
-
N/C
Front View of RJ-45 Jack Cavity
Note: The RJ-45 pins are numbered as shown above.
N/C
Figure 5-13. After the RBSU/
Figure 5-13 and
3048
Strata CTX I&M
5-12
10/02