Sur-Gard System Five, Руководство по эксплуатации

Страница: 147 / 155

Appendix E: Glossary
- 147 -
Checksum
Additional data added to an alarm indicating whether the contents have been received correctly. This is generally done by summing all the digits in the
message (mod 256) and reporting this as the checksum. Different methods of calculating a checksum may be specified in particular formats or protocols.
Client
One side of a 2-sided TCP socket connection. The client is the one responsible for initiating the socket connection with the remote host (the server). The
console represents the client side of the socket connection with the SG-CPM5.
Computer Message
See Automation Message.
Console
A PC application program which can connect to the receiver and provide diagnostic/programming abilities to the user. For the SG-System 5, the console
connects to the SG-CPM5 via TCP/IP. Visit the Tyco website (www.tyco.com) for the latest version.
Dialer
Another name for a control panel.
DNIS
Dialed Number Identification Service.
DTMF
Dual Tone Multiple Frequency. A method of dialing which utilizes 2 sets of 4 tones (frequencies) each. Selecting one tone from each set will produce 16
distinct pairs. These pairs are used to dial digits when dialing a telephone number.
Equivalent Line Number
An option in the receiver. By default printer and computer messages will contain the line card number. Sometimes it is necessary to output the printer and
computer messages with a different line card number; in this case this option can be used to overwrite the line card number in the printer and computer
outputs of the receiver.
Ethernet
A network protocol which encompasses the lowest logical layer of the network stack, immediately above the physical layer. This protocol is governed by
the IEEE and is outlined in the IEEE802.3 specification. Ethernet consists of several variations, including 10Base2, 10Base5, 10BaseT, 100BaseT, and
others. 100BaseT and 1000BaseT are the most prevalent.
Event
The specific type of alarm being reported by the panel.
Event Code
A term used to describe a character or group of characters in an automation output. This character(s) is used to represent the event that was reported by
the panel. Example 1:Sur-Gard automation reports an alarm event using an event code of 'A', Restore as 'R', or Trouble as 'T'. Example 2: Sur-Gard auto-
mation reports using a SIA output for a burglary alarm using an event code of 'BA'.
FES
Format Expert Systems. The name given to a receiver task which performs the basic functions of: 1. sending handshakes; 2. detecting the format from the
panel; 3. processing the alarm from the panel; 4. sending a kiss-off to the panel.
Format
The pre-established order of events and meanings of the various characters in an alarm transmitted from a panel to a receiver.
FSK
Frequency Shift Keying. A modulation technique used with low-speed modems (300 to 1800 bps). The carrier frequency is shifted between two discrete
frequencies in accordance with the binary serial data.
Handshake
A signal sent by the receiver to a panel indicating that a connection has been established. These are either tones or modem data.
Heartbeat
A periodic signal sent from the automation outputter tasks to the automation software to verify the presence of that output. The period of this heartbeat is
controlled via an option in the SG-CPM5. Alternatively, heartbeat refers to the signal sent between SG-CPM5s to verify each other's presence.