Modular Jack Pin Configurations - Toshiba Strara CTX Series Installation And Maintenance Manual

ISDN Interfaces
Install RBSU/RBSS PCBs into Cabinet
Step 5:
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
Strata CTX cabinet, the status LEDs and connecting jacks are positioned as shown in
Table 5-4 RBSU/RBSS LED Indications
LED
BSY
TS
LOS
FS

Modular Jack Pin Configurations

BRI (S/T) Circuit Jack (TE or NT Mode)
The RBSU/RBSS BRI circuit jack is a shielded RJ45 (8-pin modular) with Transmit (Tx) and Receive
(Rx) pin numbers as shown in
configured with RBSU/RBSS option switches for TE or NT
installed on the RBSU, the PS-1 voltage is carried on the Tx/Rx wires with polarity. (See
The position of the RBSU/RBSS circuit jacks are shown in
Table 5-5 RJ45 Pins in the 8-pin Modular Jack
Pin
No.
1
2
3
4
5
6
7
8
Monitor Jack
The RBSU/RBSS monitor jack is an RJ11 (6-pin modular). This jack provides an RS-232 output that
enables you to monitor the RBSU/RBSS BRI circuit D-channel, layer-2 and layer-3 data. The monitor
5-14
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 synchronisation circuit for ISDN.
On – The RBSU is the secondary (backup) synchronisation circuit for the ISDN.
Off – The RBSU is not used for ISDN synchronisation.
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.
Figure 5-12. The Tx and Rx pin numbers change when the BRI circuit is
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
Figure 5-13. After the RBSU/RBSS is installed in the
Indication
(Tables 5-3
Figure 5-13
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 5-12.
and 5-12). If the R40S is
Table
and 5-12 respectively.
3048
Strata CTX I&M September 2002
5-5).