ENIGMA XM88422 Digital Receiver
Version 1.50
23
5. Dual Line Card Module
The Dual Line Card Module is composed of two
identical and independent Line Cards with separate
LCD displays and controls. In the ENIGMA XM88422
Digital Receiver, the Line Cards act as the interface
link between the digital transmitters and the CPM
Unit. Different communication formats can be used to
transmit information between the Line Card and the
digital transmitters.
The main function of the Line Cards is to receive and
decode calls from digital dialers, communicators and
control panels, to monitor the status of the telephone
line and to report this information to the CPM Unit.
The Line Cards also monitor the connection to the
CPM Unit and in case of CPM failure, they are able to
function independently with manual interaction
needed from the central station operator. Each Line
Card can store up to 1600 events in its own event
buffer.
General Information
The Line Cards are able to receive signals from
digital transmitters in different formats. The following
formats are accepted by the Line Cards:
Pulse formats:
3/1, 3/1 with parity*, 10-40 baud
3/2*, 10-40 baud
4/1*, 4/1 with parity*, 10-40 baud
4/2, 4/2 with parity 10-40 baud
Extended formats*
DTMF formats:
Ademco Contact ID
4/1, 4/2, 4/3 DTMF
Ademco Express
Ademco SuperFast / High Speed DTMF
FBI SuperFast*
FSK formats:
SIA FSK level 1, 2 and 3**
* The reception of these formats depends on Line Card
configuration
** SIA level 3 with restrictions. See Appendix B for more
information
Line Card Features
User programmable handshake sequence and
communication format selection
Stores up to 1600 events and call numbers in
nonvolatile buffer
Alarm events are forwarded to the CPM Unit with
a minimum delay
The Line Card monitors the telephone line
continuously. It features very reliable true loop
current detection.
The frequency of the telephone line testing
depends on the line status.
Highly reliable signal detection
Line switching to handset for listen-in for 2-way
audio applications
Two level, high-power electric surge protection of
the telephone line interface
The Line Card monitors the connection to the
CPM Unit, and go automatically to stand-alone
mode if CPM is absent.
Built-In watchdog timer monitors Line Card
microprocessor operation
Communication format libraries are easily
upgradeable
Installation
The installation of the Dual Line Card Module is
described in Chapter 3.
Line Card Controls
The Dual Line Card Module contains two Line Cards.
The LCD display, the lights and the controls of the
first Line Card are placed on the top half of the front
panel, and the same is repeated on the bottom half of
the front panel for the second Line Card. On the top-
right of the front panel is the Power LED, which lights,
when power is applied to the module.
Liquid Crystal Display
Displays incoming data, programming, menu and
other information. The display is backlit for better
visibility in low light environments.
Line LED
The Line LED shows the status of the telephone line.
If the telephone line fails, the LED will go off, and will
light up if the telephone line is restored.
Summary of Contents for XM88422
Page 1: ...User Manual ...
