1.7
SNM15
Introduction
Digicom SpA
Frequency tolerance
:
±
1% compared to nominal
frequencies laid down in the CCITT
Q23 recommendation.
Tone duration
:
100 ms
±
5 ms.
Control and Warning Devices
The control and warning devices with which SNM 15 is equipped
can be considered as auxiliary devices since the functions played
by these devices are already present in the form of commands and
communication protocol messages.
They are particularly useful in the case of manual calls or loop
tests for the switches.
Controls on the Front Panel
DATA
answer/calling
TEST
loop 2/3
Warning Lights on the Front Panel
PWR
modem being fed
C108
DTR Data terminal ready
C107
DSR Modem ready
C103
TD Transmit data
C104
RD Receive data
C109
DCD data carrier detector
C142
TEST modem in loop
LINE
modem connected to the line
