Gardsman CTC-1241GT, Руководство по установке

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5.3. GPRS Connection
Protocols
This protocols is used to transmit SMS
messages. However, different Central
Monitoring Stations may provide different
protocols for end user.
Here is an Example of message send via SMS:
Panel account
Number (being
A DATA message,
This could be
End of
Alphanumeric) check sum message
<10> aaaa 18 qeee aa zzz cccc <CR>
Beginning Fixed q = Type of Alarm
Of message
1 = New Alarm,
(fixed) 3 = Restore
eee = Contact ID Code
aa = area 00 – 99 /
BBB – FFF
5.4. Communication Protocol
& Format
CTC-1241 Control Panel communicates with
Central Station receiver by using Contact-ID
protocol.
The Control Panel to RECEIVER
communication section is composed of three
basic elements:
The Handshake Tone sequence, Message
Blocks, and Acknowledgements. The
Handshake Tone sequence consists of a pair
of single-frequency tones sequenced in time.
The Message Blocks consists of a series of
DTMF tone bursts separated by spaces. The
Acknowledgement Tone is a single tone burst.
5.4.1. Handshake Tone
The Handshake Tone sequence is produced by
the RECEIVER. The purpose is to signal the
Control Panel that the communication channel
is ready.
5.4.2. Placement
The Handshake Tone sequence is emitted by
the receiver after going off-hook and delaying
an interval of at least 0.5 seconds but typically
no greater than 2.0 seconds. This time allows
the phone network connection to settle before
the communication process begins.
5.4.3. Composition
The handshake tone sequence shall consist of:
A burst of 1400 Hz. ± 3% tone with a duration
of 100 msec. ± 5%
A pause of 100 msec. ± 5%
A burst of 2300 Hz. ± 3% tone with a duration
of 100 msec. ± 5%
5.4.4. Message Blocks
A Message Block is sent by the Control Panel.
Each message block contains sufficient
information to report an event in the system.
5.4.5. Placement
The first message block is sent beginning 250
msec. (250 min., 300 max.) after the end of
either the Handshake Tone sequence or after a
Kiss off (Acknowledgement) tone. The delay is
timed from the end of the tone.