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NOTE: 3 & 4 are not
used and should
be
In "OFF" posrtlon.
1200/300
l.mrl
CCITT/BELL
lairr!
m
!aEcl
FIGURE 40-HMDB
EXTERNAL SWITCHES
INSTALLATION INSTRUCTIONS
SECTION 500-036-200
JANUARY 1988
NOTE.
There are no internal
connections
between
the modem
and
the associated
EKT.
09.74
Installation:
To install
the
HMO6
on
the
bottom
of an EKT, refer
to Figure
42, and
perform
the following:
1) Remove
the
standard
EKT base.
2) Insert
the HMDB's
front
tabs into the match-
ing holes
in the
bottom
of the
EKT.
3) Press the HMDB's
rear tabs into the match-
Computer
FIGURE 41-HMDB
WIRING
l
Modem
(m)
Key:
Transfers
calls
from
the
EKT's m
or m
keys to the
modem
phone.
It is
also
used
to disconnect
modem
calls. The modem
LED is on when-
ever the
modem
is in use.
l
Answer/Call
(m)
Key:
Se-
lects the modem
mode (answer
or
originate
call); the mode
switches
each
time
the
key is depressed
(LED = answer/on;
originate/off).
* Manual/Auto
(m)
Key:
Se-
lects tl- ,d m&em
n~.da
(manual
or auto
an-
swer);
the mode
switches
each time the key
is depressed
(LED = auto/on;
manual/off).
FIGURE 42-HMDB
INSTALLATION
-29-
ing
holes
in the
EKT.
Continue
pressing
until
the
HMDB
snaps
into
place.
09.75
Programming:
Verify
pro-
gramming
via Programs
4#XX
and
3#XX,
Programming
Procedures,
Sec-
tion 500-036-300.
Three
keys must
be programmed
on the associated
sta-
tion.
These
keys control
the
modern
phone
operation.
09.76
Terminal/Computer
(PC) Installation:
1) Connect
the
RS-232C
cable
(50'
maximum)
to the
HMDB's
DB-25
female
connector.
RS-232C Pin-outs
Pin No.
Name
Pin No.
Name
2
TD
2
SG
3
RD
8
CD
4
RTS
20
DTR
5
CTS
22
Cl
6
DSR
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