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Multiple handset use
Intercom
Use the intercom feature for conversations between two handsets. This  
feature is only available if you have at least two system handsets. You can 
buy accessory handsets (AT&T model BL102-0 | BL102-0S) to expand your 
system.
Use a handset to initiate intercom calls.
1.  Press MENU/SELECT on the handset in idle mode to 
enter the main menu. Press qCID or pDIR to scroll to 
Intercom, then press MENU/SELECT.
2.  If you have two system handsets, the handset shows 
Calling HS X (X represents the handset number). The 
destination device rings and shows HS X is calling.
-OR-
If you have more than two system handsets, press qCID 
or pDIR to select a device, or use the dialing keys to 
enter a device number (1-5). The handset shows Calling 
HS X. The destination handset rings and shows HS X is 
calling.
To answer an intercom call:
 f Press   PHONE/FLASH, or  /SPEAKER on the called handset. Both 
handsets now show Intercom. 
To end an intercom call:
3.  Press  OFF/CANCEL or places the handset back in the telephone base or 
charger. 
NOTES:
 f Before the intercom call is answered, you can cancel it by pressing  OFF/CANCEL.
 f If the called party does not answer within 100 seconds or if the handset is in use, on a call or out of range, the 
calling handset shows No answer. Try again.. 
 f Pressing  OFF/CANCEL or MUTE/DELETE temporarily silences the intercom ringer. 
 f You can only use one pair of handsets to make intercom calls at a time.
Answer an incoming call during an intercom call
If you receive an incoming outside call during an intercom call, there is a  
two-beep call waiting tone.
•  To answer the call, press  PHONE/FLASH. The intercom call ends 
automatically. The party on the intercom call hears four beeps. Other system 
handsets can also answer the incoming call by pressing  PHONE/FLASH. 
Calling HS X
 
ECO
HS X is calling
 
ECO
Intercom
 
ECO