Document: LT0732 QE20 Fibre Networking User Manual
Issue 1.0 24 May 2023 Page 1-7
For the QE20 two different Fibre Network Kits are available – depending on the type
of fibre used.
• FP2024 FP, QE20 FIBRE NETWORK KIT, SINGLE MODE
• FP2025 FP, QE20 FIBRE NETWORK KIT, MULTI MODE
Typically, multi-mode fibre will allow up to ~3km between QE20 panels, whereas
single mode fibre will extend to ~40km between panels.
Generally, the whole ring will be run in the same fibre type, but it is possible to use
different types of fibre. This will require additional equipment at those QE20 panels
that need to support both types of fibre – at least an additional fibre switch will be
needed.
The fibre network kits are sufficient for voice communication with up to 31 other
QE20 panels. If the QE20 needs to simultaneously send Speech and/or WIP All-Call
to more than 16 other QE20 panels, then additional PIBs and other equipment will
need to be added. Formulae for determining the quantities required are described in
this manual and implemented in QE20Cost.
If background music and or paging audio must be transferred around the network,
then additional equipment will be required. For each pair of additional audio signals a
VIF and ATA is required, plus an additional PIB will be needed for every 31 remote
nodes receiving the audio.
The QE20 fibre network cannot be used to increase the existing limits of a QE20
network or a Panel-Link network regarding the maximum number of nodes supported
by a QE20. But multiple QE20 networks could be contained on one large fibre
network.
Programming of each QE20 site configuration for fibre networking is mostly the same
as RS485 networking. However, configuration is required for the ATA dialling plans
to enable VoIP calls to be set up around the network. Additionally, the PIB, ATA,
Fibre Switch and VIF will require configuration. This is described in this manual.
A Fibre-Copper Bridge QE20 allows the connection of an RS485 copper network
onto a fibre ring. This could be used to convert the main fibre network into a local
building RS485 copper network for wiring to other QE20 panels within the building.
The bridge QE20 includes a second RS485 Network Module to provide the PA and
WIP Audio signals for the copper network (the first Network Module handles the
main fibre network signals).
The Fibre-Copper Bridge QE20 provides audio bus joining so that it may hold
separate Speech and WIP conversations with the QE20s on its copper segment,
while other conversations are taking place on the fibre network.
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