Aastra 9143i Series Administrator's Manual page 166

IP Phone Administrator Guide
Administrator Level Options
Polling Action URIs
Another way to reach a phone behind a NAT/firewall is to have the phone make an
XML call at periodic intervals. An Administrator can use the action uri poll to
command the phone to perform an XML call at configurable intervals.
An Administrator can specify the URI to be called and specify the interval
between polls. Configuration of this feature is dynamic (no reboot required).
Reference
For more information about configuring the polling and polling interval of Action
URIs, see
3-74
"Polling Action URIs" on page 5-339.
41-001160-03 Rev 00, Release 2.5