While the study of data formats and protocols can get
rather involved (see
Appendix B
), a generic discussion of
them is appropriate at this time. Essentially, all formats
deliver common information about the protected premises.
This information includes an
account number
identifying
the customer from whose premises the report is being
made, as well as information about the
nature of the
report
, seen in Figure 1-2 as the
Reporting Code.
The
figure provides an example of a popular reporting format
that carries sufficient information for an operator at the
Central Station to properly dispatch the event.
Data delivered to the Central
Station from any of its
Customer Accounts is often
required to convey
substantial amounts of
information in a short period
of time. To do so, many
different methods of carrying
data, called
protocols, have
been developed. The
protocol represented in
Figure 1-2 is quite popular
and is known as an
Expanded Format. It is
neither the simplest nor the
most complex way to
express information and has
been chosen to illustrate this
concept.
FIGURE 1-2
The following table contains examples of what each of the two
characters in the above
Reporting Code
may represent. Note that what
appears in the table is by no means absolute, and the characters
assigned to the particular events are often determined by the
preferences of the individual Central Stations. Also keep in mind that
the
Expanded Format
used in this illustration is only one of many
formats that communicate such information.
REPORTING CODE
REPORTING CODE
1st CHARACTER
2nd CHARACTER
1st CHARACTER
2nd CHARACTER
1 FIRE
1-9 ZONES
8 ZONE 1-9 ZONES
1-9
TROUBLE
1-9
2 HOLDUP
1-9
ZONES
9
TEST
0
DOESN'T
(SILENT)
1-9
APPLY
3
BURG
1-9
ZONES
B OPENING 0-F USERS
0-F
1-9
(PREMISES)
4 MEDICAL
1-9
ZONES
C CLOSING 0-F USERS
0-F
EMER
1-9
(PREMISES)
5
PANIC
1-9
ZONES
D
ABORT
0
DOESN'T
(AUDIBLE)
1-9
SIGNAL
APPLY
6 ZONE 1-9 ZONES
E ZONE 1-9 ZONES
BYPASS
1-9
RESTORE
1-9
7 ENVIRON
1-9
ZONES
F
SYSTEM
0-F
EVENTS
EMER
1-9
TROUBLE
0-F
TABLE 1-1
Several examples have been furnished on the next page to help clarify the point. For convenience,
the above table has been repeated, as well.
CP-220A Central Station Receiver
Section 1: Getting Acquainted Page 1-3
Hook-Up and Installation Manual