Allworx 24X Manual de usuario descargar pdf (Pagina 22)

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Revised: February 8, 2007

Page 19

11.3 Troubleshooting ABLF

Generally speaking, the ABLF protocol and Allworx devices take care of themselves, even when NAT/Firewalls

exist at the remote sites sitting in front of the remote phones. This is because the Allworx server and phones

work together to safely traverse NAT devices within the same restrictions explored previously when talking

about SIP. It is not even normally necessary to open a specific NAT firewall device port at the remote site to

support ABLF – the phone will keep an automatic port open with the server. In the event that one or more

devices or subnets are not correctly receiving ABLF packet updates, something is probably administratively

blocking traffic on the configured ABLF UDP port (2088 by default). Make sure that nothing is specifically

blocking port 2088 to the Allworx WAN port and that no intermediary NAT/Firewalls limit port 2088 traffic from

local LAN to WAN. If port 2088 is limited or blocked, you can change the Allworx server’s receiving UDP port

as specified previously.

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Allworx 24X Manual de usuario Pagina 22