Sur-Gard SG-System III, Руководство по эксплуатации

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Appendix H - GLOSSARY
125
SG-Sys
tem I Operating Man
ual
H
Ping A standard network command which can be used to verify the presence of a device on a network, using the
device IP address. Ping is implemented as part of the ICMP protocol and consists of the Echo Request and
Echo Reply commands (poll and response respectively).
POTS Plain Old Telephone System . An acronym used to describe a standard analog telephone network, or alterna-
tively a standard analog telephone line.
Printer Message The alarm information delivered by a receiver to a central station printer. This information is generally encap-
sulated in a descriptive English text message.
Profile Generally refers to a group of options. The receiver can select a "profile" based on certain conditions.
Protocol The pre-established order of events and meanings of the various characters in the information transmitted from
a receiver to a monitoring computer.
PSTN Public Switched Telephone Network . Analogous to POTS.
Receiver The equipment used to receive alarms sent from panels. Sur-Gard's receivers are the SLR and the MLR.
'Receiver' is sometimes used interchangeably with 'line card' as it is the line card which actually receives the
alarm in the MLR.
Ring One of the wires used on a phone line. By convention this is red.
Rounds Two or more packets of alarm information used for error checking. If two packets (rounds) are identical the
packet contains valid data.
RRLLL The part of the automation message which stores the receiver number and line card number. The length of this
field is variable and is controlled via an option in both the line card and the SG-CPM3.
RS-232 An asynchronous, point-to-point serial communications protocol. Used to communicate between the
SG-DRL3 and a PC for the SG-DRL3's debug output. Also used to communicate between the SG-CPM3 and
the automation computer, and the SG-CPM3 and a PC for the SG-CPM3's debug output.
Server One side of a 2-sided TCP socket connection. The server is the one responsible for receiving the socket con-
nection with the remote host (the client). In general, a host which acts as a server can receive multiple client
socket connection requests simultaneously. The SG-CPM3 acts as a server to both the console and the web
interface.
SG Sur-Gard, a brand name of DSC. Also used to describe a particular type of automation output.
SG-BP3 A motherboard-style PCB which acts as the backbone for a single shelf of a SG-System III receiver. The SG-
BP3 contains sockets to which up to 12 SG-DRL3s, 1 SG-CPM3, 1 SG-PSC3 and 2 SG-DC/DC3s can be con-
nected. Furthermore, 2 SG-BP3s can be connected together to form a 2-shelf configuration for the SG-System
III receiver. The SG-BP3 also contains connections for a parallel printer and 2 serial automation COM ports,
as well as an Ethernet connection. Also referred to as a backplane.
SG-BP3X Rack mount module that converts 50 pin telco connections to 24 individual RJ11 connections.
SG-CPM3 Central Processing Module. The SG-CPM3 controls the overall operation of the SG-System III receiver, which
includes multiplexing alarm signals from the line cards and sending them to the appropriate outputs.
SG-DC/DC3 The DC power supply of the SG-System III receiver.
SG-DRL3 POTS Receiver Line Card.
SG-DRL3E Updated DRL3 platform based on the DRL3-2L.
SG-DRL3-IP IP based line card.