S E C T I O N 6
System Communication and Operation
Panel Communication with Central Station
This system accommodates several formats for reporting alarms and other system conditions to the Central Station. The process of a successful transmission consists of both the method of communication between the control panel and the Central Station receiver; and the actual way the information is sent and displayed at the Central Station.
When the panel calls the Central Station receiver, it waits to hear a “handshake” frequency from the receiver to confirm that the receiver is
If the handshake frequency is not given or is not understood by the panel, the panel will not send its message. Once the handshake frequency is received and understood by the panel, the panel sends its message. If there is an error in the transmission (the receiver does not receive a “valid” message), the kissoff frequency is not given by the Central Station receiver.
The panel makes a total of eight attempts to the primary telephone number and eight attempts to the secondary telephone number (if programmed) to get a valid message through. If the panel is not successful after its numerous attempts, the keypad displays COMM. FAILURE (on alpha keypads) or FC (on fixed- word keypads).
Report Code Formats
The following chart indicates the types of (handshake/kissoff) frequencies that the panel supports and the different formats that can be sent with each.
FORMAT | HANDSHAKE | TRANSMITS DATA | KISSOFF | TRANSMIT TIME |
Low Speed | 1400 Hz | 1900Hz (10PPS) | 1400 Hz | Under 15 secs |
3+1, 4+1, 4+2 |
|
|
| (Standard report) |
Sescoa/Rad | 2300 Hz | 1800Hz (20PPS) | 2300 Hz | Under 10 secs |
3+1, 4+1, 4+2 |
|
|
| (Standard report) |
Express | DTMF (10 cps) | 1400 Hz | Under 3 secs | |
4+2 |
|
|
|
|
|
|
|
|
|
Contact ID | DTMF (10 cps) | 1400 Hz | Under 3 secs |
The following table describes each format in greater detail.
FORMAT TYPE | DESCRIPTION |
3+1 and 4+1 | Comprises a 3- (or |
Standard Formats | code (e.g., Alarm, Trouble, Restore, Open, Close, etc). |
3+1 and 4+1 | Comprises a 3- (or |
Expanded Formats | The first digit is displayed on the first line. On the second line, it is repeated |
| 3 (or 4) times and is followed by the second digit. This is the “expanded” |
| digit. |
4+2 Format | Comprises a |
ADEMCO Contact ID | Comprises a 4- or |
Reporting Format | selected), |
| |
| following page). |