DS1000/2000 Correspondence Course
DS2000 System Installation
108 ◆ DS1000/2000 Workbook NEC America
Power Failure Cut-Through
When system AC power fails, the 4ATRU and 8ATRU PCB automati-
cally cuts through the first 2 trunk circuits to 2 Power Failure Telephone
connections.
To install Power Failure Cut-Through:
1. Locate an available 8-pin jack in a trunk block or station block.
Local codes may prevent you from using a connector on the station
block for optional equipment.
2. For the 8-pin jack chosen, cross-connect the associated wire pair from
the station or trunk block to the cross-connect block.
3. Install a modular jack for each Power Failure Telephone within six feet
of the telephone’s location.
4. For each Power Failure Telephone, run one-pair of 24 AWG station cable
from the cross-connect block to the telephone’s modular jack.
5. Terminate the station cable WHT/BLU - BLU/WHT leads to the RED
and GRN lugs in the modular jack.
6. Install bridging clips as required.
Installing a Music Source
RJ61X
Pin
Latch
faces up
To CPU
Mod Jack
Note
reversal
Port
Designation
To 66 Block
WHT-BLU (1T)
BLU-WHT (1R)
WHT-ORN (2T)
ORN-WHT (2R)
WHT-GRN (3T)
GRN-WHT (3R)
WHT-BRN (4T)
BRN-WHT (4R)
80000 - 18A
4T
3T
2T
1R
1T
2R
3R
4R
1
2
3
4
5
6
7
8
Page Out
Music In
Relay Contacts
No Connection
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