ENIGMA XM88422 Digital Receiver
Version 1.50
24
Comm LED
The Comm LED indicates that the Line Card is on-
line. It also indicates the telephone line test. The LED
is off if the Line Card hangs up and waits for call.
Error LED
The Error LED indicates Line Card trouble condition.
The LED is on, when the telephone line is failed, or
the CPM Unit is absent, or fault data/call is received.
The LED will go off, if the trouble condition is cleared
or corrected.
Audio LED
The Audio LED comes on when the receiver is in
Audio Mode
– 2-way audio or listen in is in use. The
Audio LED will go off by the termination of the Audio
Mode
– timed or by pressing the CLR button.
Arrow Buttons
The arrow buttons (< >) can be used to enter the Line
Card menu, when the CPM Unit is absent and the
Line Card operates in stand-alone mode.
OK Button
The OK Button can be used to silence the
buzzer/acknowledge, when the CPM Unit is absent
and the Line Card operates in stand-alone mode. It
also can be used to activate the menu, select menu
items and to enter data, when programming.
CLR Button
With the CLR Button, the operator can terminate the
call being received by the Line Card, or terminate 2-
way Audio Mode. The CLR Button is also used for
stepping back/cancel in programming mode.
Operation with the CPM Unit
If operated with the CPM Unit, the Line Cards do not
require any interaction from the central station
operator except for 2-way audio mode. Besides, the
operator can terminate the incoming call if needed by
pressing the CLR button while the Line Card is in
communication.
Normally all Line Card functions are controlled by the
CPM, and also the Line Card programming is done
through the CPM Unit.
Stand-by Mode
After power-up or reset, the Line Card first displays
the intro and version information
ENIGMA XM-88422
Version 1.10.170
After that, it goes to stand-by mode. In stand-by
mode the Line Card monitors the telephone line and
waits for calls from digital communicators. If the unit
is operating normally the following will be displayed:
Line #01
Waiting for call
Besides the Line Card number, depending on system
status, the following messages can be displayed:
Line trouble
Line restored
CPM Absent
CPM Restored
Unit in standby
Telephone Line Monitoring
The Line Cards check for the presence of the
telephone line periodically when in stand-by mode.
The Comm LED indicates the line test. The Line Card
test is based on true loop current detection, which
allows very reliable line monitoring. If the telephone
line fails or disconnected, the line trouble condition
will be sent to the CPM and the following will be
displayed:
Line #01
Line trouble
After that, the Line Card reduces the line test period
to sense the telephone line restoration with a
minimum delay. After the line is restored, the line
restoration event will be transmitted to the CPM Unit,
and the display will indicate:
Line #01
Line restored
After line restoration, the period of the line checks is
reset to normal. The line test periods can be
programmed by the user for both cases.
CPM Unit Monitoring
The Line Cards sense the polling of the CPM Unit,
and switch automatically to stand-alone mode. In
addition, the following is displayed on the LCD
screen:
Line #01
CPM Absent
When the CPM Unit is absent, the Line Card will
beep on every incoming event and requires central
station operator acknowledge by pressing the OK
button. The incoming events are stored in the 1600-
event Line Card buffer.
Summary of Contents for XM88422
Page 1: ...User Manual ...
