Avaya one-X 9620 Notice D'utilisation page 19

... Enter the desired number.
Lift the handset.
Calling someone with the touch of a button
Press the destination key for the desired subscriber.
Lift the handset.
Redial
You can redial one of the last 10 numbers called.
Press the "Redial" softkey.
Scroll to the desired number, e.g. 06975051234.
Lift the handset.
Receiving a call during a conversation (call waiting, second call)
You receive a call while you are on the phone. The display shows who the caller is,
e.g. 06975058, and the display key or LED next to it is flashing.
Answer the call.
Consultation and call forwarding
During a call:
Press the "Refback" softkey.
... Enter the number you wish to consult.
... Return to original caller, new caller is put on hold:
Scroll to the menu item with the rapidly flashing display key/LED, e. g.
06975058 and confirm. The other party is now on hold.
... Or end call with new caller and return to waiting party:
Press the "Transfer" softkey.
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