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Mitel 4000 Series Digital Handsets 

Mitel Superset 4015 
Mitel Superset 4015
20 character digital display screen 
On-hook dial 
SuperKey programming for easy access to PBX telephone system features 
7 programmable keys with LED 
Limited Automatic Call Distribution (ACD) functionality 
Speed calling 
Placing calls on hold 
Transferring calls 
Setting up conference calls 
Mitel Superset 4025 
Mitel Superset 4025
Speaker phone 
Handsfree operation (half duplex) 
20-character backlit display 
Context-sensitive softkeys for feature-set customization 
Off-hook call announce 
14 programmable keys with LED indicators 
Supports Automatic Call Distribution (ACD) agent and supervisor functionality 
Supports firmware download 
SuperKey programming for easy access to PBX telephone system features function keys 
Mitel Superset 4150 
Mitel Superset 4150
Speaker phone 
Handsfree operation (full duplex) 
Large backlit display 
Context-sensitive softkeys for feature-set customization 
Off-hook call announce 
14 programmable keys with LED indicators 
Supports Automatic Call Distribution (ACD) agent and supervisor functionality 
PC connectivity to support TAPI-compliant applications 
Supports firmware download 
SuperKey programming for easy access to PBX telephone system features function keys 
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