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Cable installation
33
Model 3196RC T-DAC User Manual
2 • Hardware installation
Note
To synchronize the ForeFront system with a BITS clock, you must
connect the site BITS clock system to the
EXT CLOCK
connector
located on the rear-panel of the T-DAC WAN Access Module rear
card (see
figure 13
).
Figure 13. EXT CLOCK connector location
Do the following to connect the WAN Access Module card’s
EXT CLOCK
connector to the BITS clock:
1.
The
EXT CLOCK
connector is a 3-pin terminal block connector (see
figure 13
). As you face the rear-
panel, pin 1 is located at the top (vertical card orientation) or left (horizontal card orientation).
Table 6
lists the connector pinout.
2.
Plug the connector on the end of the BITS clock cable into the
EXT CLOCK
connector. Tighten the cap-
tive screws to secure the connector.
Table 6. EXT CLOCK connector pinout
Pin
Description
1
Negative input
2
Positive input
3
Chassis ground
W
AN ACCESS MODULE
READYALARM
W
A
N
D
S
L
EXT CLOCK
EXT CLOCK connector
EXT CLOCK
Pin 1
Pin 3