Bosch LTC-1311-20 Operator's Manual page 76

76 en | Glossary
A block is divided into two parts, one for pre-alarm and alarm recording, the other one for
continuous recording.
The alarm recording part is organized in 1 to 128 tracks. If the system switches from
continuous to alarm recording, the data is stored in one of the tracks. Per alarm a single track
is used. A track has a fixed size on the disk.
The size of the alarm track is determined by the bit-rate and the pre- and alarm-duration that
you configure. These settings are used to calculate the size of an alarm track.
Logbook Container for logging all events in Bosch Video Management System.
Logical number
Logical numbers are unique IDs assigned to each device in the system for ease of reference.
Logical numbers are only unique within a particular device type. Typical use of logical
numbers are Command Scripts.
Logical Tree
Tree with a customized structure of all the devices. The Logical Tree is used in the Operator
Client to select cameras and other devices. In the Configuration Client, the "Full Logical Tree"
is configured (on the Maps and Structure page) and tailored for each user group (on the User
Groups page).
LUN Logical Unit Number. Used in the iSCSI environment to address an individual disk drive or a
virtual partition (volume). The partition is part of a RAID disk array (the iSCSI target).
Map window Used for displaying either maps or documents, it cannot display video content and is not
limited to a 4:3 ratio.
Master Control Software
Software used as interface between Bosch Video Management System and an Allegiant
device. Version 2.8 or greater is used.
Metadata Data of a POS or ATM like date and time or bank account number stored with the
corresponding video data to provide additional information for evaluation.
MHT Also called 'Web Archive'. File format that can save all HTML and image files of an Internet site
in one file. To avoid problems we recommend to create MHT files with Internet Explorer 7.0 or
higher only.
MIB Management Information Base. Term in the SNMP environment for a table containing state
and control data for a network device. Every entry in a MIB is identified by its OID. The MIB is
stored in the device. A MIB file is used for importing the MIB data into a MIB.
Motion detection
Software component that watches for changes in the video image. The threshold for the
amount of change required to identify motion can be configured.
MPEG-4 Motion Picture Expert Group. Standard for encoding (compressing) digital audio and video for
multimedia applications.
MSS Maximum Segment Size. The largest amount of data, specified in bytes, that a computer or
communications device can handle in a single, unfragmented piece.
MTU Maximum Transmission Unit. Describes the maximum amount of data (in bytes) that can be
transferred without being fragmented.
Operator Client | V3 | 2010.07
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Operator's Manual
Bosch Video Management System
Bosch Sicherheitssysteme GmbH