DK40 Installation
TBSU Two-circuit ISDN BRI Interface Unit
2-40
Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
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Modular Jack Pin Configurations
BRI Circuit Jack (TE or NT Mode)
The TBSU BRI circuit jack is a shielded RJ-45 (8-pin modular) with Transmit (Tx) and
Receive (Rx) pin numbers as shown in Table 2-11. The Tx and Rx pin numbers change when
the BRI circuit is configured with TBSU option switches for TE or NT (Table 2-9).
Table 2-10 TBSU LED Indications
LED Indication
BSY
Circuit Busy
ON – Any B-channel is in use.
OFF – B-channels are idle.
TS
Timing Source
Flashing ON/OFF – This circuit is providing the system timing source.
ON – This circuit is the secondary (backup) synchronization circuit for the ISDN
OFF – This circuit is not used for system timing.
LOS
Loss of Signal
ON – A signal cannot be detected from the line.
OFF – Normal condition.
FS
Frame Alignment Alarm
ON – Frame alignment cannot be established.
OFF – Frame alignment is established.
Table 2-11 RJ-45 Pins in the 8-pin Modular Jack
Pin No. TE Mode NT Mode
1N/CN/C
2N/CN/C
3TxRx
4RxTx
5RxTx
6TxRx
7N/CN/C
8N/CN/C
87654321
3048
Front View of RJ-45 Jack Cavity
Note: The RJ-45 pins are numbered
as shown above.
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