5-5 DL (Duplex Link Unit)
Function: Operates under the control of the HC unit to connect or disconnect the
individual links for conversation between two stations, changing over
from the hands-free conversation to the full duplex conversation mode,
or vice versa. One DL unit is provided with 4 links. Up to 3 DL units can
be mounted in the EX-610 and up to 4 in the EX-620/630.
5-6 CL (Conference Link Unit)
Function: Operates
under the control of the HC unit to connect or disconnect the
links for conversation among up to 4 parties and conversation between 2
parties. One CL unit is provided with 1 conference link and 2 speech links.
5-7 LM (Line MODEM Unit)
Function: Is composed of a modulator to transmit signals from
the station to the speech link, a demodulator to send
out signals from the speech link to the station, a dial
receiver and a scanning circuit that scans the station
"Privacy ON/OFF" conditions and "Handset ON/OFF"
conditions. Up to 8 stations can be connected per LM
Unit.
Station number lamp
Each lamp varies its brightness to in-
dicate the condition of the station. The
relation between brightness and line
status is as follows:
Bright: Exchange and station are con-
nected properly.
Off: Exchange
and
station
are
not
connected.
Extremely bright (yellow):
Short circuited between paired
lines.
Arrangement of the LMs with individual ranges for the
station numbers covered (from left to right) is shown here.
5-8 SI (Speech Interface Unit)
Function: Connects
to
the
SM-600
Speech Message Device to
send or receive a voice signal.
5-9 PI (Paging Interface Unit)
Function: Provides
PA
paging and station paging. It sends out both
paging voice signals and relay make signals for power
remote control of the PA amplifier. It also delivers the
serial output for radio pagers. The PA paging signal goes
out through the assigned YR-801 cable to terminal P1
or P2 of the BX-610/620 terminal boards.
5- 10 SA (Station Paging Assignment Unit)
Function: Distributes each of paging outputs to each LM unit.
This unit cannot be used for EX-610/620.
5-11 Tl (Tie-line Interface Unit)
Function: When 2 or 3 exchanges are tie-line connected, this units
transmits and receives the audio signals and dial data
between the exchanges.
5-12 DS (Power Supply Unit)
1. DS-610 (for 64 stations)
An exclusive power supply unit for the EX-610 exchange.
This unit cannot be used in the system for more than 64 stations.
2. DS-620 (for 128
stations)
An exclusive power supply unit for the EX-620 exchange and can
also be used for the EX-610 exchange.
3. DS-630
(for
256
stations)
An exclusive power supply unit for EX-630 exchange.
5-13 BC (Battery Case)
An exclusive battery case for EX-630.
Accomodates three of Ni-Cd batteries (Sealed type, NDC-2460).
The charger circuit is incorporated in DS-630.
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