Aastra 9000i Series Administrator's Manual page 150

XML SIP Notify Events and Action URIs
In order for an XML push to bypass the NAT/firewall, the phone supports a proprietary SIP
NOTIFY event (aastra-xml) with or without XML content.
If XML content is provided in the SIP NOTIFY, it is processed directly by the phone as it is done
for an XML PUSH.
Reference
For more information about enabling the XML SIP Notify on the IP Phones, see Chapter 5, the
section, "XML SIP Notify Events" on page 5-316.
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
"Polling Action URIs" on page 5-309.
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