Aastra Telecom SIP 57I - Manual (Page 348)

Operational Features
5-138 41-001160-00, Release 2.1, Rev 04
IP Phone Administrator Guide
Operational IP Phone Features
5 In the “Value” field, specify the extension you want to intercept when you press this softkey.
For example: 2200
6 Click to save your changes.
Aastra Web UI