Installation manual

Windsor Installation Manual - Issue C
-
41
-
SmartDial
Alarm Protocols
SmartDial Protocols
Fast Format Alarm Reporting
In the fast format alarm format alarm data is represented by 8 channels. When any channel
changes state, the communicator is triggered to initiate a call to the programmed central
station. Each channel can assume one of six states;
• No Alarm (Code 5)
• New Alarm (Code 1)
• Continuing Alarm (Code 6)
• Alarm Restore (Code 3)
• New Opening (Code 2)
• New Closing (Code 4)
The manner in which the transitions between these states are reported to the Central Station
is dependent upon how the communicator is programmed to respond. The actual meaning
given to each channel is known only to the panel and the central station.
Alarm and restore events are reported to the programmed central station using the protocol
defined in the draft IEC publication 839 part 8 - “DTMF protocol for use in Digital
Communicator Systems at Interfaces with the PSTN”. The protocol types supported are as
follows;
• 4-8-1/1 4 digit ID, 8 digit channel data , 1 digit status - handshake type 1
• 4-8-1/2 4 digit ID, 8 digit channel data , 1 digit status - handshake type 2
SmartDial Protocols
Superfast Format
This is an enhancement to the standard fast format reporting and is user selectable as a
programmed option. The standard fast format protocol at the central station receiver requires
to see two identical messages before it accepts the message as valid (a basic method of error
detection). The Superfast format sends the message only once, and relies on it’s error
detection, on the appending of a suitable checksum digit to the message. This offers both time
and communication cost savings.
SmartDial Protocols
Restore Codes
When any channel goes into alarm the communicator will always initiate an alarm report call.
Normally, the transition from alarm to restore is ignored by the communicator. However, any
channel(s) programmed for restore reporting will report the restore condition.
SmartDial Protocols
Open/Close Codes
Not all of the 8 channels necessarily represent alarm data. Any of the 8 channels may be
programmed to report a modified code. The alarm receiver will interpret close instead of
alarm and open instead of restore for these channels. Selection of Open/Close will override
selection of Alarm and Restore Reporting.
The eight channels can be programmed in any combination of Alarm Only, Alarm/Restore and
Open/Close code reporting.