Network Requirements And Considerations - Bosch PRAESENSA Installation Manual

PRAESENSA
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Ethernet glass fiber cable
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4.6

Network requirements and considerations

PRAESENSA uses technologies built on top of standard Ethernet networks and the
performance of PRAESENSA is heavily reliant on the network configured underneath it. As a
result, the underlying network needs to be configured correctly. If the network is not
functioning properly, the audio equipment will not function properly either. Because all
PRAESENSA devices have integrated Ethernet switches, a system can be set up without being
dependent on third party network infrastructure. In many situations, however, PRAESENSA
may have to share the network with other services, especially on existing network
infrastructure. Although most Gigabit networking equipment will adequately support
PRAESENSA, certain configurations that may be present in an enterprise network could cause
issues. In any case it is appropriate to consult the IT department when planning and
configuring a PRAESENSA network, taking the following network considerations into account.
Bosch Security Systems B.V.
All PRAESENSA devices are designed to be used with Gigabit transmission (1000BASE‑T),
so be sure to use shielded CAT5e or higher network cables. You can use shielded CAT6
and CAT7 cables as necessary. According to their specifications, CAT5e or higher cables
can transmit data up to 100 m, but the actual potential transmission distance varies
depending on factors such as the cable and termination quality and the environment in
which the cable is used. In case of doubt use a cable checker to see whether the cable
conforms to CAT5e (TIA/EIA‑568‑B). Furthermore, cables can be categorized into solid
core cables and stranded cables according to the structure of the conductors within the
cables. In a solid core cable each of the eight conductors consists of a single copper wire,
while in a stranded cable each conductor consists of stranded multiple copper wires.
Solid core cables have better transmission performance over long distances than
stranded cables. Stranded cables are more flexible and easier to handle than solid core
cables. Therefore, in general, solid core cables are suited for installations, while stranded
cables are suited for short patch links inside racks.
Make only gradual bends in the cable where necessary to maintain the minimum bend
radius of 4 times the cable diameter. Never allow the cable to be sharply bent, twisted, or
kinked at any time. This can cause permanent damage to the geometry of the cable and
cause transmission failures.
Dress the cables neatly with cable ties, using low to moderate pressure.
Use single mode or multi-mode glass fiber that fits the SFP transceiver.
The length of the fiber must not exceed the maximum as specified for the SFP
transceiver, also considering the fiber diameter.
Keep all food and beverages out of the work area. If fiber particles are ingested they can
cause internal hemorrhaging.
Wear disposable aprons to minimize fiber particles on your clothing. Fiber particles on
your clothing can later get into food, drinks, and/or be ingested by other means.
Always wear safety glasses with side shields and protective gloves. Treat fiber optic
splinters the same as you would treat glass splinters.
Never look directly into the end of fiber cables until you are positive that there is no light
source at the other end. An SX fiber 850 nm light source is hardly visible, an LX fiber
1310 nm light source is not visible at all.
Do not touch your eyes while working with fiber optic systems until your hands have been
thoroughly washed.
Put all cut fiber pieces in a properly marked container for disposal.
Thoroughly clean your work area when you are done.
General installation procedures and instructions | en
Installation manual
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2019.11 | V1.00 |