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6.7.2 Terminate Clock Supply Cables
The Building Integrated Timing System (BITS) clocks come directly from the central office
BITS clock source or indirectly from an optional holdover clock installed in the system.
See
Holdover Clock Installation
Refer to
6.7.3 Terminal Cables
There are 16 I/O ports on the control shelf backplane that are used to support external
printers, terminals, or modems.
Use terminal/printer cable 830-0535-xx or 830-1154-xx. Different combinations of adapters
are possible, see
Refer to
See the "Cable Running List" in the Equipment Specification to determine how to connect
1.
the external cables.
All cable ends must be labeled with "TO" and "FROM" location information from Port to
Backplane.
Place the cables on the cable rack.
2.
Feed the cable ends (with connectors) down the side of the system, outside the cable tie
bars, around the top or bottom edge of the control shelf and fan out to the connectors.
Secure each connector to the designated receptacle on the control shelf backplane.
3.
Plug the connector in, start one of the connector screws, fully tighten the second screw,
then fully tighten the first screw.
Tie-wrap each cable to the cable tie bar at the rear of the shelf.
4.
Dress the cables neatly and tie-wrap to the cable tie bars at the side of the frame.
5.
Pull the slack in the cable back toward the other end of the cables and lace to the cable
rack.
Ensure that each tie-wrap strap is cut flush with the tie-wrap head so sharp edges are not
6.
exposed.
Attach any necessary adapter to the end of the cable, see
7.
attach cable or cable plus adapter to the device.
Connect terminal cable adapter 830-0535-xx or 830-1154-xx to modem adapter
830-0535-xx or 830-1153-04.
6.8 Holdover Clock Installation
The holdover clock option and its associated output panel are normally factory installed in a
miscellaneous frame. Use the following procedures to complete the holdover clock
installation.
for optional holdover clock installation information.
BITS Clock Connectors
for cable connector information.
Table
6-3.
Cables and Adapters
for detailed cable and adapter connector information.
Chapter 6
Holdover Clock Installation
1
of this procedure; then
6-95
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