This table should help to illustrate this point:
ALARM MESSAGES
MEANING
AAA E
A 3-digit
Account Number
(AAA) identifies the subscriber, and the 1-digit
Event Code
(E) identifies the alarm or event.
Examples:
123
1
456
2
789
6
Explanations: (typical)
Account 123 has a Fire Alarm (Code 1)
Account 456 has a Holdup Alarm (Code 2)
Account 789 has a Zone Bypass (Code 6)
Summary:
A report sent in the
Partially-Expanded
format (e.g., Radionics BFSK) does not produce
expanded
information for
Event Codes
between 0 and 9.
AAA EX
A 3-digit
Alarm Code
(AAA) identifies the subscriber; the 1-digit
Event Code
(E) identifies the event; and, if the
Event Code
is a hexadecimal
character between "B" and "F," a digit with
expanded information
(X) will be
provided.
Examples:
111
B6
222
C2
333
E5
444 F6
Explanations: (typical)
Account 111 has just "opened" (Code B) via "User 6"
Account 222 has just "closed" (Code C) via "User 2"
Account 333 has just experienced an alarm restoral (Code E)
on Zone 5
Account 444 has a system trouble (Code F) whose designation (6)
indicates the nature (e.g., a ground fault) of the problem
Summary:
A report sent in the
Partially-Expanded
format (e.g., Radionics BFSK) will provide
expanded
information if the
Event Code
is a hexadecimal character between "B" and "F."
Certain manufacturers whose control panels and digital
communicators transmit the
Radionics BFSK
format offer
the option of transmitting expanded information for
all
Event Codes (i.e.,
0 through 9
and
B through F
). This
enhancement to the original format offers additional
information that may be useful to the Central Station and
better serve the interests of the subscriber.
Additional information on this subject can be found in
PARAMETER 61: Extended BFSK Alarms,
in
Section 2,
on
pages 2-57 through 2-58.
CP-220A Central Station Receiver Appendix B:
Page B-19
Hook-Up and Installation Manual
Communication Formats