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FUNCTIONS WHICH REQUIRE ADDITIONAL UNITS
(When the Exchanges are connected by means of Tie-line.)
Those functions of the CPU-56 which require either the addition of specific units or processing in existing units are as
mentioned below. Before installation and adjustment of equipment, make sure to check your system.
(For Data Transmitting and Receiving units, refer to Part 2. "Function Selection for Data Transmitting and Receiving
units" Page 43.)
CPU - 56
OCU - 52A
HCU - 52
SGD - 52A
DLU - 52
LMU - 52A
TI - 52
PIU-52/52A
AC POWER INDICATOR LAMP
BATTERY POWER INDICATOR LAMP
BUZZER STOP SWITCH
DS-550A
Function
Talk-Back from
paging speaker
Conference
External PA Paging
Station Paging
Tieline connection
of exchanges
Data Transmitting
and Receiving Units
DT-E11 and DR-B61
Additional Equipment
Required
Talk-Back Unit
Conference Unit
Paging Interface Unit
Paging Interface Unit
Tieline Unit
Output Unit
Frame
Frame
Unit Model
Nos.
TKU-11
CLU-52
PIU-52/52A
PIU-52/52A
TI-52
OCU-52A
FR-510A/B
520A/B
FR-510B
520B
Remarks
Optional amplifier (10W max.) may be re-
quired depending on application
External PA Equipment is required.
1. Wiring of "Station Paging Assignment
Plug" located at the back of the frame of
the Exchange.
2. Cutting of LMU jumper wire to split sta-
tion paging system. (Refer to Service
Manual for LMU-52/52A, PIU-52/52A).
Turn off the DIP switch for tieline
links not used when the exchanges are
connected by tielines
OCU-52 must be modified.
(Add M9, M17 and TTL IC 7475 2 pcs.)
PIU-52A and TI-52 can be mounted.
with terminal for interface output
– 5 –