QE20 Fibre Networking User Manual Document: LT0732
Page 2-12 24 May 2023 Issue 1.0
SID. It does not wait for any WIPs to be answered. The ATA maps the dialled
number to the IP address and port of the VoIP Proxy or ATA at the calling panel and
makes the call.
2.1.5 Inter-QE20 WIP Call
This works in a similar way to the User Interface-initiated call described above. There
is no on-hold condition with inter-QE20 ECP calls. Note it is not possible to hold
simultaneous calls with the ECP WIP and field WIPS at the same QE20.
Additional Audio Signal Communication
2.1.6 Background Music
Panels that receive background music over the fibre network will make a (usually
permanent) VoIP call to the panel that distributes the music. If the source of the
music can change (e.g., it is controlled by a paging console), then the VoIP calls
made will depend on the current music source.
2.1.7 Paging Console Audio
Panels that receive paging announcements over the fibre network will make a call to
the panel that sources the paging console audio, i.e., the panel which connects to
the paging console(s).
If there is more than one panel with a paging console, then the VoIP calls will be
made to the panel with the active paging console. Otherwise, VoIP calls can be
made always to a fixed panel. In both cases, the QE20 script should be
programmed to make the VoIP calls when required, i.e., when paging is in use.
Network Data Requirements
Please refer to the information in the PIB User Manual (LT0519).
In addition to the Ethernet traffic requirements listed in LT0519, you must allow for
the VoIP traffic. This is approximately 80 kbps for each possible simultaneous
connection. For a standard call this data is transmitted both ways, while for a
streamed connection (e.g., Speech or WIP All-Call), data is one-way from the source
to each destination. For example, if a panel can be sending speech to 6 other nodes
and a (two-way) WIP call could be in progress at the same time, the total traffic
would be 6 x 80 kpbs + 2 x 80 kbps or approximately 640 kbps.
If additional audio signals are transported over the network then the data
requirements of these will need to be added in.
Ports / Protocols Used by the ATA and PIB
2.1.8 ARP
ARP is required to map IP addresses to MAC addresses.
2.1.9 ICMP
ICMP is supported to the extent that replies are sent to PING requests.
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