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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | 3 | Control Equipment en | 119
7 LBB4404/00 CobraNet
Interface
7.1 Introduction
The LBB4404/00 CobraNet Interface is used to
interface between a CobraNet and Praesideo. The
CobraNet interface can convert up to 4 audio channels
from Praesideo to CobraNet and 4 audio channels from
CobraNet to Praesideo at the same time. See figure 7.1
for a block diagram of the CobraNet interface.
CobraNet is a combination of software, hardware and
network protocol which allows distribution of many
channels of real-time, high quality digital audio over an
Ethernet network. CobraNet is supported for switched
Ethernet variants. CobraNet uses standard Ethernet
packets and network infrastructure (controllers,
switches, cabling, etc.) that operate in compliance with
the IEEE 802.3u specification for Fast Ethernet. Fast
Ethernet distance limitations apply to CobraNet
installations: 100 meters over Cat-5 copper cable, 2
kilometers over multimode fiber. Proprietary Fast
Ethernet via single mode fiber solutions can reach even
further.
CobraNet can sent up to 64 channels of 48 kHz, 20-bit
audio over a single 100 Mbit link in each direction.
These channels are grouped in bundles.
See www.cobranet.info for information on CobraNet,
including network design, network installation, network
redundancy and troubleshooting.
Note
CobraNet
TM
is a registered trademark of Peak
Audio, a division of Cirrus Logic, Inc.
figure 7.1: Block diagram of the CobraNet interface
CobraNet
Interface
Sample rate
conversion
D/A
Network
processor
+
DSP
CAT5
CAT5
Control inputs
POF
POF
Control outputs
Network
redundancy
switching
IO
Display + Control