Document: LT0732 QE20 Fibre Networking User Manual
Issue 1.0 24 May 2023 Page 2-13
2.1.10 TCP
TCP Port 80 provides a web server that is used for configuration and diagnostic
monitoring of the ATA, PIB and fibre switch. Access to these web servers is highly
recommended for service personnel, as many diagnostic details are provided by only
these web servers.
2.1.11 SIP
SIP over UDP is used by the ATA and PIB VoIP proxy to set up and take down calls.
By default, the ATA uses UDP ports 5060 and 5061. The PIB VoIP proxy uses UDP
ports 5060 to 5063 by default.
An ATA that wants to initiate a call to another ATA or PIB VoIP proxy will send a SIP
INVITE message. The remote VoIP device may then send a TRYING / RINGING
response, and if the call is answered by the remote VIF, will then send an “OK”
response. The two VoIP devices will then send audio data each way using RTP. At
the end of the call, one of the VoIP devices will send a BYE message.
2.1.12 RTP
RTP over UDP is used by the VoIP devices to transfer digitised voice data between
QE20s. The ATA uses UDP ports 16384 to 16482 by default. The PIB VoIP proxy
uses UDP ports in the range 16000 to 19998 inclusive.
Router / Firewall / VLAN Configuration
Dedicated fibre networking should be used for the QE20 network.
If this is not the case, then the evacuation network must be configured into a
separate VLAN so its traffic is isolated from that of other users of the network. Refer
to PIB User Manual (LT0519) for further information on this.
Routers/Firewalls within the IP network must be configured not to block any
addressed (i.e. non-broadcast) TCP, UDP, SIP, and RTP packets to / from the PIBs
and ATAs on the network. Refer to section 2.7 for the protocols / ports used by the
ATA and PIB for VoIP communication, and to the PIB User Manual (LT0519) for the
protocols / ports used by the PIB for Panel-Link networking.
Note, SIP sometimes does not work well with systems employing Network Address
Translation (NAT) because the ATA embeds its IP address in the message it sends
to the other connecting ATA. If NAT is employed, special programming of the SIP
ATAs, PIB, and the router providing NAT will most likely be needed.
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