CONTROLS AND INDICATORS
( see drawing page 28-29 )
TALK - MON Switch
Located below the receiver, this 2-position switch is
used to select the mode of operation.
TALK – Talk
This position connects the testset to the line for
network signaling, conversation, and testing. The
TALK position creates an off-hook condition such as
that created when the receiver is picked up on a
regular telephone set.
MON – Monitor
This position connects the testset to the line
through
a
high
impedance
monitoring of the line without disturbing on-going
conversations, data transmission, or network
signaling.
MAR
TALK
circuit,
allowing
E.DIS
OFF
MON
The MON position creates an on-hook condition,
with the speech and test circuits isolated from the
line.
The electronic ringer is connected to the line in
Monitor mode.
The "SIGNALSHIELD™" detecting alarm feature
may sound. (see
section page 14).
PULSE - TONE
Located below the receiver, this 2-position switch is
used to select the dialing mode.
The TONE position selects DTMF signaling. The
PULSE position selects rotary style, dial pulse
signaling.
PULSE
"SIGNALSHIELD"
operation
DC
FV
TONE
6