QE20 Fibre Networking User Manual Document: LT0732
Page 7-2 24 May 2023 Issue 1.0
When the PIB VoIP proxy is utilised, the PIB status page will also show useful
information. The channel status can be seen – if it is not “streaming” then the call
hasn’t connected properly. The IP addresses of callers to a channel are displayed
here as well. Check to see the calling ATA is listed. If the PIB knows of a problem
that caused a call to fail, then this will be logged. Log entries are shown on the PIB
Internal Log web page.
If the required call is “connecting”, but audio is not being received, it is likely that the
problem is in the PA and WIP audio connections from the QE20 Network Module to
the VIF (at each end), a faulty VIF or ATA, or (less likely) something in the IP
network is blocking RTP traffic. The latter condition could be confirmed by the
number of “RTP packets received” not incrementing on the ATA status page.
If the required call is not “connecting”, this should be confirmed by the LEDs on the
VIF, and by a fault being generated on one or both QE20s. Check the status page of
the ATA that should be making the call and see if (every 1 - 2 seconds) Call 1 state
changes from Idle to Dialling. If not the problem may be with the VIF card or ATA at
that end. If it does change to Dialling but never to Connected, the problem could
be a configuration issue, an issue with the IP network, a faulty VIF, faulty or
misconfigured PIB, or a faulty ATA at the receiving end.
Note: The Problem Reporting Tool button (PRT) on the ATA cannot be used as there
is no server on the QE20 network for the ATA to send the report to.
Fault Finding Using a Phone
A standard “touch tone” phone with an RJ11 cable can be used for some diagnosis.
• Plug it (instead of the VIF) into the ATA Phone port and dial the number that
the VIF should be dialling to reach a particular remote panel. Check that the
call is answered. If applicable check that you can hear audio from the far end,
e.g., when someone at the panel is making a Speech (PA) announcement
that should be getting to the panel you are at.
• Plug the phone (instead of the VIF) into the ATA Phone port and check that it
rings when other panels or the PIB VoIP proxy attempts to make a connection
to it, e.g., by connecting a WIP call.
Be sure that you take account which end initiates the VoIP calls – refer to sections
3.4.1, 3.4.2, 3.4.3.
Fault Finding a Ring Network
Note: if the ring is broken somewhere the master Moxa switch will turn its red fault
LED On and this will be annunciated at that QE20 as PIB Input Fault.
Note: if a QE20 panel is turned off the fibre links on each side of the panel will
appear “down”. However, all other panels will keep working as long as only one
panel is turned off. If you need to power down a panel for an extended time, you
could use a fibre connector to bypass the fibre switch.
To locate where a break is, use a web-browser to browse to each of the Moxa
switches in turn until one that is adjacent to a break is found. If you know the order
the switches are wired in, you could check only every second switch.
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