Document: LT0732 QE20 Fibre Networking User Manual
Issue 1.0 24 May 2023 Page 3-5
Configuration of the QE20
3.1.1 Speech Call Origination
For Speech, each remote QE20 containing amplifiers for the selected zones will dial
the QE20 making the speech announcement.
If there is more than 1 remote location that can be receiving speech at the same
time, at least one PIB VoIP proxy must be configured at this QE20. A PIB VoIP proxy
will be required for every 31 simultaneous callers.
3.1.2 WIP Call Origination
For WIP calls to/from a field WIP, the VoIP call is made from the QE20 to the
location where the field WIP is terminated.
For inter-ECP WIP calls, the VoIP call is made from the location that connects the
call. VoIP calls are not made until the WIP call is connected.
For WIP All-Call (if it is configured), VoIP calls are made from the location(s) where
field WIPs are terminated to the QE20 that initiates All-Call (usually to a VoIP Proxy
function on the PIB). These VoIP calls are made as soon as All-Call is received (if
accepted), regardless of whether any phones have been picked up.
3.1.3 Paging Console Audio / Background Music Call Origination
Calls for paging console audio and background music are controlled by the QE20
scripting. Calls are made from the panels with amplifiers to the panel which
generates the audio. Note when there are multiple panels that could generate the
paging audio, a call will need to be made to the relevant panel when that source is
active.
Refer to Section 3.6 for an example.
3.1.4 Use of Multiple VIF, ATA, and PIBs
If there are multiple remote nodes requiring Speech from a given panel, or WIP All-
Call is implemented, or the panel connects to a paging console or background music
source, or the panel receives paging console audio or background music from a
remote panel, then multiple VIF modules, ATAs, and PIBs may be required.
To calculate the number of VIF modules, ATAs, and PIBs required, the easiest way
is to use the QE20 pricing program QE20COST. QE20COST will: –
• Calculate the quantities of VIF modules, ATAs and PIBs required.
• Check that there is enough room in the chosen cabinet.
• Calculate the battery and power supply requirements.
• Allow for additional modules that may be required for distributing Paging
Console audio and/or background music.
• Calculate the price of a complete panel with all fibre networking equipment
pre-installed and tested.
Note that QE20COST uses the following rules to determine the number of VIFs,
ATAs, and PIBs, and to design their interconnections: –
• An ATA line can be used for two-way connections between two panels,
receiving audio broadcast by another panel, and to act as an audio source to
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