Overview ComISDN Installation Manual
6 INS187
Operation
The digimodem can be used to report system events to a Central Monitoring Station
(using Fast Format, Contact ID or SIA Level II) or to upload/download control panel
information using the Wintex UDL software and a PC.
In order to use the digimodem for uploading and downloading control panel
information you will require a PC with Windows 95, 98 or NT a modem that supports
V.21, V.22 or V.22bis operation.
To obtain your copy of the Wintex UDL software, please complete and return the
Software Registration form enclosed with the Premier ComISDN.
Communicator Operation
When a reportable system event occurs, the digimodem will seize the telephone line
and dial the telephone number for the Alarm Receiving Centre, once the receiver
answers the call the following sequence of events will occur.
• The digimodem will send a handshake signal
• If the handshake signal is acknowledged, the digimodem will report the event
to the Alarm Receiving Centre using Fast Format, Contact ID or SIA Level II
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If the handshake signal is not acknowledged, the digimodem will shut
down and attempt to dial another telephone number.
• Once the event has been successfully reported to the receiver, the receiver will
send back an acknowledgement signal and the digimodem will shut down. The
digimodem will then return to its normal mode
Modem Operation
The digimodem will monitor the telephone line for an incoming ringing signal, once
the ringing signal is detected the following sequence of events will occur.
• The digimodem will pick up the telephone line and establish a connection with
the remote computer
• Once the connection is established, the remote computer can be used to
upload data from the control panel or download data from a PC
• Once the remote computer has finished uploading/downloading, it will tell the
digimodem to go hang up. The digimodem will then return to its normal mode
