6
14VAC
May be used as an external AC output.
BATT
May be used as an external 12V power source. Do not connect a battery to these terminals.
B. LIGHT
Backlight power input terminal. Connect a secondary 12V power source to illuminate the LCD screens. A secondary power
supply is not required if a 12V supply has already been connected to the DML4 B LGT terminal.
HNDSET1
Handset connections for Line 1 and Line 2. These terminals are used to provide 2-way voice communication
HNDSET2
when the Audio Mode is activated. Note that the handsets must normally be off-hook.
RxRNG1
These terminals are used to simulate a ring signal on the telephone lines for test purposes. These terminals are
RxRNG2
also used for Downlook video communication or to remotely cancel an audio session.
TxPG1
12V programmable outputs. These terminals are also used for Downlook video communications; when Downlook
TxPG2
is being used, these terminals may not be used as programmable outputs.
AC IN
16VAC power input
AC OUT
16VAC filtered power output
BATT
12V battery
B.LGT
Backlight Power Terminal: connect as
secondary 12V power supply to illuminate
the LCD screens
GND
Ground
BUZZ
Buzzer Output: this 12V output follows the
internal buzzer
TAMP
UPS Low Battery Supervisory or External
ACK
R SIM
UPS AC Failure Supervisory
HNDSET B
Not used
HNDSET A
Not used
AUX
Fused 12V output
RCA
Not Used
RCB
Not Used
ACK
Acknowledge Output: this 12V output follows
the “Acknowledge” light
TRBL
Not used
OPT
Option Output: this 12V output follows the
“Option” light
PGM1
Output 1 (used for RED1 installation)
PGM2
Output 2 (not used)
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