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2-40
The system can be equipped with two (2) T-1 Interface Boards and the
T1IB can be installed in Slots 0 thru 2 in the
T1IB can be installed in Slots 0 thru 5 in the
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 2-18
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
Triad 1/2
following chart. 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:
when more than one T1IB boards are installed. When the
Systems and a CSU and the switch selection as indicated in the
Table 2-6: T-1 Ordering Information
T-1 Ordering Information
Table 2-7: T-1 Switch Positions
Distance
0 to 133 feet
133 to 266 feet
266 to 399 feet
399 to 533 feet
533 to 655 feet
Triad 1
Triad 2
6.0P
04DU9-B
RJ48C
Switch #
1
2
3
on
on
on
off
on
on
on
off
on
off
off
on
on
on
off
CO/PBX Connections
Basic KSU, while the
Basic KSU. The Phase
4
on
on
on
on
on
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