Aastra Telecom 480I CT manual Configuring the IP Phones

IP Phone Administrator Guide Advanced Network Settings

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Configuring the IP Phones

Aastra Web UI

Step Action

1Click on Advanced Settings->Global SIP->Advanced SIP Settings.

2Enable the "Explicit MWI Subscription" field by checking the check box. (Disable this field by unchecking the check box).

If the IP phone has a message waiting subscription with the Service Provider, a Message Waiting Indicator (MWI) (LED or display icon) tells the user there is a message on the IP Phone.

3If you enable the “Explicit MWI Subscription” field, then in the “Explicit MWI Subscription Period” field, enter the requested duration, in seconds, before the MWI subscription times out. The phone re-subscribes to MWI before the subscription period ends. Default is 86400.

4In the "Session Timer" field, enter the time, in seconds, that the IP phone uses to send periodic re-INVITErequests to keep a session alive. The proxy uses these re-INVITErequests to maintain the status' of the connected sessions. See RFC4028 for details.

4-48 41-001129-00 Rev 09, Release 1.4.1