Aastra Telecom 53I - Manual (Page 114)

Broadsoft Interoperability Features
108 RN-001029-00, Rev 03, Release 2.1
IP Phone Release Notes 2.1
Configuring a Server Blacklist Using the Aastra Web UI
You use the following procedure to configure a server blacklist using the Aastra
Web UI.
Aastra Web UI
1 Click on Advanced Settings->Global SIP->Advanced SIP Settings
2 In the “Blacklist Duration” field, specify the length of time, in seconds, that a failed server remains
on the server blacklist.
The IP phone avoids sending a SIP message to a failed server (if another server is available) for this
amount of time.
For example: 600
3 Click to save your changes.