Bosch LTC-1311-20 Operator's Manual page 78

78 en | Glossary
Payload
Describes the portion of a packet of transmitted information that carries user traffic. It is
effectively what remains in a packet if all headers or trailers are discarded.
Playback Mode
Used to playback and search through archived videos.
Port 1) On computer and telecommunication devices, a port (noun) is generally a specific place for
being physically connected to some other device, usually with a socket and plug of some kind.
Typically, a personal computer is provided with one or more serial ports and usually one
parallel port. 2) In programming, a port (noun) is a "logical connection place" and specifically,
using the Internet protocol, TCP/IP, the way a client program specifies a particular server
program on a computer in a network. Higher-level applications that use TCP/IP such as the
Web protocol, Hypertext Transfer Protocol, have ports with preassigned numbers. These are
known as "well-known ports" that have been assigned by the Internet Assigned Numbers
Authority (IANA). Other application processes are given port numbers dynamically for each
connection. When a service (server program) initially is started, it is said to bind to its
designated port number. As any client program wants to use that server, it also must request
to bind to the designated port number. Port numbers are from 0 to 65535. Ports 1 to 1023 are
reserved for use by certain privileged services. For the HTTP service, port 80 is defined as a
default and it does not have to be specified in the Uniform Resource Locator (URL).
POS Point of sale.
Post-alarm time
See Post-event time.
Post-event time
Time period after an event has happened. The system stores the recorded video for this
period.
Pre-alarm time
Time period before an alarm happens. The system stores the recorded video for this period.
Pre-event time
Time period before an event. The system can store the recorded video for this period.
Primary NVR
Computer in the Bosch Video Management System environment. A Primary NVR stores audio
and video data.
PTZ camera Camera with pan, tilt, and zoom function.
QCIF Quarter CIF. See Video resolution.
RADIUS server Remote Authentication Dial-In User Service: a client/server protocol for the authentication,
authorization and accounting of users with dial-up connections on a computer network.
RADIUS is the de-facto standard for central authentication of dial-up connections via Modem,
ISDN, VPN, Wireless LAN (see 802.1x) and DSL.
Operator Client | V3 | 2010.07
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Operator's Manual
Bosch Video Management System
Bosch Sicherheitssysteme GmbH