Avaya Phone System Manuals > 7400 Series Telephones > FAQs
  

 

 

The display on my 7444 model phone has quit working but the phone is still taking calls. What's wrong?

The display has it's own power unit. If the power unit is unplugged or defective, the display will not work.

Recommended local power supplies are the 1151A1 or 1151A2 with Battery Holdover or the MSP-1 Power Supply.


 

 

 

 

 

 

 

 

 

 

   
 

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