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SIA FSK Format
The SIA digital format is a modem format communicating at
110 or 300 baud and using the SIA protocol to transfer
information to the computer.
The standard DRL2A is equipped with the Bell 103 modem
chip. The CCITT V.21 modem chip may be installed upon
request when ordering the MLR2-DG or DRL2A modules.
The CCITT V.21 chip is for use with modem frequencies
specified by the CCIT V.21 recommendation.
NOTE:
The DRL2A can accept SIA formats with and without
separators. The DRL2A Version 1.8 Software implements
Level 1, Level 2 and Level 3 of the SIA 1993IIb Digital
Communication Standard, except that it does not support
"Receiver Call out and Access Passcode Block", "Reverse
Channel Block", and "V-Channel Communications".
To distinguish from the other formats already decoded by
the DRL2A, the data will be displayed on the printer as
follows:
L01-xx1234NBA-3423 18:36:00-30/09
• L01 represents Line Card 01
• xx1234 represents Account Code 001234
• N represents New event
• BA represents a Burglary Alarm
• 3423 represents Zone 3423
• 18:36:00 is the time in the 24-hour clock format
(hours:minutes:seconds; in this example, the time is 6:36 pm)
• 30-09 represents the date; in this example, the date is
September 30
The DRL2A supports an account code with a maximum of
16 digits, (including any displayable ASCII characters except
the "|") with option 31 (SIA option for Level 2 & 3 decoding)
enabled (01), and an account code with a maximum of 6
digits with option 31 disabled (00). If option 31 (SIA level
2-3) is disabled, the "A"s received in the account code will
be converted to "0"s. It also supports an Alarm code witha
maximum of 4 digits. Usually, the central station automation
software will interpret the Alarm Codes. For manual operation,
refer to the SIA Event Block Data Code Definitions for
information on interpreting the Alarm Codes.
When an alarm is received, it will be displayed on the DRL2A
display. For the alarm message shown above, the following
would be displayed:
L01-xx1234
L01-xx1234
L01-xx1234
L01-xx1234
L01-xx1234
NBA-3423----
NBA-3423----
NBA-3423----
NBA-3423----
NBA-3423----
Acknowledgements for the SIA format are tonal by default.
The transmitter may, however, request data acknowledgement
by transmission of the optional configuration block. When
the DRL2A receives the configuration block from a transmitter
requiring data acknowledgement, it will send the tonal
acknowledgement to this block. It will then send the data
acknowledgement to the following data blocks if the data
received is identical.
Silent Knight FSK1, FSK2
Please see page 39 for details.
Varitech Format (Available on 1.81SV)
The Varitech format data will be decoded by the DRL2A as
4/1 or 4/2 format data. The printer messages and the computer
outputs are the same as those used for the regular 4/1 and
4/2 format.
