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MD Evolution – Dialog 4223 Professional
Operations for Outgoing Calls
Automatic Call-Back on No-Answer 
Condition
When placing a call to an internal party whose extension is “FREE”, 
but your call remains unanswered, you may activate the automatic 
call-back on no-answer condition for the called extension.
To do so:
CALL_BACK Press the dynamic function key shown on the left.
d  or  í Replace the handset or press the “C” key to end the call in 
handsfree mode.
You will be automatically called back when your called party has 
demonstrated his/her renewed presence, typically by placing a new 
call from his/her extension.
Then, once you have answered this call-back, your internal called 
party will be automatically re-rung.
Notes: 
An automatic call-back is typically valid for 15 minutes. 
When this timeframe expires, if your called party has not 
affirmed his/her presence, the service will be automatically 
cancelled. When you are called back, you typically have 
30 seconds to answer the automatic call-back service. If 
you do not answer within that timeframe, the automatic call-
back is automatically cancelled.
With both services, you receive visible and audible confir-
mation that you have successfully registered the automatic 
call-back on busy or no answer condition.
Your extension may also be subject to the automatic call-
back on busy or on no-answer service from third party sets.
L1 SMITH Peter-405
FREE
DTMF VPAGING CALL_BACK FLASH >
Automatic callback
REDIAL CALLERS PICKUP NAME >