Mitel 6867i Administrator's Manual page 560

Mitel 6800 Series SIP Phone Release 4.2.0 Administrator Guide
If the content is missing in the SIP NOTIFY message received by the phone, the phone
automatically uses the value you specify for the following parameter:
• action uri xml sip notify
CONFIGURATION FILES
For the specific parameter you can set in the configuration files, see Appendix A, the section,
"Polling Action URI Settings"
Enabling/Disabling XML SIP NOTIFY Using the Mitel Web UI
Use the following procedure to enable/disable the XML SIP NOTIFY feature in the Mitel Web UI.
MITEL WEB UI
1. Click on Advanced Settings->Global SIP->Advanced SIP Settings.
2. The "XML SIP Notify" field is disabled by default. To enable this field, check the box.
This field enables or disables the phone to accept or reject an aastra-xml SIP NOTIFY
message.
Note: To ensure the SIP NOTIFY is coming from a trusted source, it is recommended
that you enable the Whitelist feature (Whitelist Proxy parameter) on the IP phone.
If enabled, and the phone receives a SIP NOTIFY from a server that is NOT on the
whitelist (i.e. untrusted server), the phone rejects the message.
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