Ericsson 4220 User Manual

65

Other Useful Features

Hot line

Ask your system administrator if you require this function. 

When the handset of the delayed Hot line phone is lifted or when 

the Line key is pressed, a timer is started. If no digit is pressed 

before time out, a call is automatically generated to a specific 

extension or external line. If a digit is pressed before time out the 

phone works as an ordinary phone.

Note: This function is only available in newer versions of the 

The same function as described above, but without a delay. Only 

Hot line calls can be placed from this line. To be used e.g. as alarm 

phone, door phone etc.

Alarm extension

An extension can be programmed by your system administrator as 

an Alarm extension. A call to an Alarm extension obtains automatic 

Intrusion if the extension is busy. Up to seven calling parties may be 

connected at the same time.

Emergency mode

In the event of an emergency, the operator can set the exchange 

into Emergency mode, during which only preprogrammed 

extensions are permitted to make calls. If your extension is not 

assigned with this category and you try to make a call, you will not 

receive a dial tone.