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4+2 Express ADEMCO's Express format provides the same information as the 4+2 format, but
with three differences:
1. The data is transmitted in DTMF (Dual Tone Multi-Frequency, known as
"TouchTone", at the rate of 10 characters per second). This greatly decreases
the time it takes a report to go through to central station. An average 4+2 Low
Speed report might take as long as 20 seconds to complete its report, but
4+2 Express takes under 3 secs.
2. Two message rounds are eliminated by the use of a checksum digit. Instead
of the communicator sending 2 rounds per report, it sends only 1 round with
a checksum digit at the end. Doing this also helps in decreasing the time it
takes for a report to be sent.
3. The handshake frequency is 1400 Hz followed by 2300 Hz, and the kissoff
frequency is 1400 Hz.
Ademco High Speed
Reporting
ADEMCO's High Speed format transmits data in DTMF at a rate of 10 characters per
second. The handshake frequency is 1400 Hz followed by 2300 Hz, and the
kissoff frequency is 1400 Hz. The message contains 13 digits as follows: A 4-digit
account number + eight channels of zone information (1-8 or duress plus 9-15) +
one status channel, which identifies the type of events being reported in the eight
zone locations. A typical High Speed report will be kissed off in under 5 seconds.
Channels 1 through 8 could have one of the following conditions:
1 = NEW EVENT
2 = OPENING (Status Channel Always = 2)*
3 = RESTORE
4 = CLOSING (Status Channel Always = 4)*
5 = NORMAL, NO EVENT TO REPORT
6 = PREVIOUSLY REPORTED, NOT YET RESTORED
* NOTE: Channel 1 will contain the user ID 1-9, A-F if Open/Close reporting is
enabled.
The status channel might have one of the following conditions:
1 = DURESS (For Duress Plus Channels 9-15 Only)
2 = OPENING
3 = BYPASS (For Channels 1-8 Only)
4 = CLOSING
5 = TROUBLE (For Channels 1-8 Only)
6 = SYSTEM STATUS: • AC LOSS in Channel 1
• LOW BATTERY in Channel 2
• PROGRAM TAMPER in Channel 3
• POWER ON RESET in Channel 4
7 = NORMAL ALARM STATUS (Chnls 1-8 Only)
9 = TEST REPORT
A typical high speed report may look as follows:
1234 5115 5555 7 (Acct #1234 with alarms on channels 2 and 3)
High Speed Format Limitations
1. When using Ademco high speed, remember there are only 15 channels
available, plus a duress channel. If more than 15 zones are being used, they will
have to share channels.
2. With Ademco High Speed reporting, channels 9-15 cannot report troubles or
bypasses. Use these channels for zones that will not report these conditions.
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