Cortelco 3719 Telephone User Manual


 
If a local call, and its 7-digit number is displayed:
Pressing 7-10-11 once will change it to a 10 digit format.
Pressing 7-10-11 twice will change it to an 11 digit number.
Pressing 7-10-11 three times will go back to the original 7 digit telephone number.
The LCD can only display 10 digit telephone numbers, when you change the format to 11 digits, only the first 10
digits can be seen, but it will dial 11 digits after you press DIAL.
If a long distance call, and its 10 digit number is displayed:
Pressing 7-10-11 once will change it to an 11 digit number.
Pressing 7-10-11 twice will remove the 3 digit area code and change to display only the 7 digit number.
Pressing 7-10-11 three times will go back to the original 10 digit telephone number.
When the desired format of the telephone number is reached, press DIAL to dial the displayed number.
In idle mode, the 7-10-11 button can be used to adjust the LCD contrast. There are 4 different contrast levels.
MESSAGE ERROR
The display indicates [-MESSAGE ERROR-]” if your unit receives a call that has an error in the transmission or
reception.
NO DATA SENT
[-NO DATA SENT-] will be displayed if there is no caller ID (CID) number sent from the telephone company
while ringing.
22