Aastra Telecom SIP 57I - Manual (Page 263)

Operational Features
41-001160-00, Release 2.1, Rev 04 5-53
Configuring Operational Features
Operational IP Phone Features
Aastra Web UI
1 Click on Basic Settings->Preferences->General.
2 Incoming Call Interrupts Dialing is disabled by default.
If required, enable the "Incoming Call Interrupts Dialing" field by checking the check box.
3 Click to save your changes.