Bosch LTC-1311-20 Configuration Manual page 172

172 en | Glossary
Example: User A is member of a user group called Group A. User B is member of Group B.
Additionally a dual authorization group is configured with Group A and Group B as members.
For the users of Group A, dual authorization is optional, for users of Group B it is mandatory.
When user A logs on, a second dialog box for confirming the logon is displayed. In this dialog
box, a second user can log on if he is available. If not, user A can continue and start the
Operator Client. He then has only the access rights of Group A.
When user B logs on, again a second dialog box for logging on is displayed. In this dialog box,
a second user must log on. If not, user B cannot start the Operator Client.
Dual streaming
Dual streaming allows an incoming data stream to be encoded simultaneously according to
two different, individually configured settings. This creates two data streams: one for live and
pre-event recording, the other for continuous, motion, and alarm recording.
Duplex Term used to define the direction of data transmission between two parties.
Half-duplex allows data transmission in both directions but not simultaneously.
Full-duplex allows simultaneous data transmission.
Dwell time Preset amount of time a camera is displayed in an Image window until the next camera is
displayed during a camera sequence.
DWF Design Web Format. Used to display technical drawings on a computer monitor.
DynDNS Dynamic Domain Name System. A DNS host service that holds IP addresses ready in a
database. Dynamic DNS allows you to connect to the device via the Internet using the host
name of the device. See DNS.
Encoder Changes an analog stream to a digital stream, e.g., to integrate analog cameras in a digital
system like Bosch Video Management System. Some encoders can have a local storage like a
flash card, a USB hard disk, or they can store their video data on iSCSI devices. IP cameras
have an encoder built in.
Event A circumstance or state that is linked to an alarm and/or an action. Events can arise from
many sources such as cameras, archivers, directories, digital inputs, etc. They can include
start-recording states, loss of signal states, disk full messages, user logons, digital input
triggers, etc.
Failover NVR
Computer in the Bosch Video Management System environment. Takes over the tasks of a
Primary NVR in case this server fails. This takeover can happen even when the Central Server
is not working. Now the Failover NVR records all the cameras of the Primary NVR. When the
Primary NVR is fixed and online again, the recordings are again stored on this NVR, the
cameras are switched back automatically. The Failover NVR stops recording. The recordings of
the down time of the Primary NVR stay on the Failover NVR.
FIFO First in first out. Mode in the alarm handling of Bosch Video Management System that defines
the order of active alarms with the same priority.
Frame A single video image.
Frame rate See IPS.
Configuration Client | V3 | 2010.07
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Configuration Manual
Bosch Video Management System
Bosch Sicherheitssysteme GmbH