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3-50
The system can be equipped with four (4) T-1 Interface Boards and the
T1IB can be installed in card slots 0-8 in the Basic KSU. The Phase Locked
Loop Unit (PLLU) must be installed on the MPB when the T1IB is installed.
The DTMF4-A board which contains 4 DTMF receivers can be optionally
installed on the T1IB.
The clock control cable should be connected by daisy-chain method like
Figure
T1IB boards are installed. When the clock control cable of the T1IB is
connected by daisy-chain method, the clock selection switch of the first
T1IB must be placed in the Enable position and the other board should
be placed in the Disable position. The Line Build-Out switch must be
selected by distance between the
switch selection as indicated below. If the CSU is located near the KSU, all
LBO switches should be ON.
The SW1 switch #4 of the Line Build-Out switch is used for LoopBack
control. Its switch is used only for hardware test and must be placed in
the ON position for normal operation.
Ringer Equivalent Number
Facility Line Interface
Jack Type
0 to 133 feet
133 to 266 feet
266 to 399 feet
399 to 533 feet
533 to 655 feet
3-20: T-1 Clock Connect Cable Installation when more than one
Table 3-11: T-1 Ordering Information
T-1 Ordering Information
Table 3-12: T-1 Switch Positions
Distance
Triad 3
Switch #
1
2
on
on
off
on
on
off
off
off
on
on
CO/PBX Connections
System and a CSU and the
6.0P
04DU9-B
RJ48C
3
4
on
on
on
on
on
on
on
on
off
on
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