Your 8403 Voice Terminal
The 8403 voice terminal has an innovative design to make it easy to use the many features of the DEFINITY® Communications System Generic 1 and Generic 3, the DEFINITY® Enterprise Communications Server (ECS) Release 5, and System 75. Familiarize yourself with your 8403 voice terminal, shown in Figures 1 and 2 and explained on the following pages.
Handset
Volume control button
Transfer button 
Feature button 
Conference button 
Test button
Drop button
Handset jack
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| Mute | Drop |
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Mute |
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Feature Directory
3 Call appearance buttons Message light
Line jack (on back of LINE voice terminal)
Speakerphone/ headset adapter jack (on back of voice terminal)
Figure 1. One Version of the 8403 Voice Terminal
1