Zte A16 User Manual page 30

Making DDD: Enter telephone number by Number keys (add area code when
making a long distance call), press Dial key to send a call. Hang up the phone by
End key if the call is over.
Dialing extension number:
Method 1: Dial the telephone exchange and then the extension number.
Method 2: Enter the telephone exchange number, hold # key to enter pause character
"P", enter the extension number, and then press Dial key. Then your phone will dial the
extension automatically after getting through the exchange. Like this:
Area code Exchange number P Extension number Dial key
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