Intercom
The intercom feature lets you communicate with another handset or the base without using the phone line.
Making an Intercom Page
From a handset
1) With the phone in standby mode, press hold/transfer/int'com.
2) Use
volume up/down to select the base or the handset you want to talk with, and then
press select/
.
If you select All, all other handsets and the base will be paged. An intercom tone sounds. To cancel intercom, Press end.
From the base
1) With the phone in standby mode, press transfer/int'com/hold on the base.
2) Use 
volume up/down to select the handset you want to talk with, and then press the OK soft key. If you select All, all other handsets will be paged. An intercom tone sounds.
To cancel intercom, press transfer/int'com/hold or the CANCEL soft key.
Answering an Intercom Page
When the intercom page tone sounds, the display will show the ID of the handset or base that is paging.
[72]
If the party is busy or out of range, the phone returns to standby mode.
If you receive an outside/intercom call or page while selecting the other handset (or the base), the operation will be canceled.
If you do not select a handset or the base within thirty seconds, the operation will be canceled.
If the party does not answer within one minute,
the operation is canceled.
If the party is out of range, Unavailable appears in the display, and the operation will be canceled.
If all handsets and the base are paged, only the first party to answer the page will connect.