Avaya Communication Manager Administrator's Manual page 686

Telephone Reference
8434D telephone
The basic 8434 (8434D01A) and the enhanced 8434DX (8434D02A) telephones are
multi-appearance digital telephones which offer 34 call appearance/feature buttons, each with a
red light and a green status light, four standard fixed feature buttons (CONFERENCE, DROP,
HOLD, and TRANSFER), a MUTE button, a SPEAKER button which accesses either a 2-way
speakerphone or a 1-way listen-only speaker, a TEST button, a SHIFT button (some 8434DX
telephones will have a RING button instead), a red Message light, personalized ringing, a
built-in speakerphone with a reset option, and a built-in 2-line by 40-character VFD display. The
8434 and 8434DX also have five softkeys and four display control buttons which allow the user
to access 15 features. These softkey features can be used in addition to the features on the call
appearance/feature buttons.
The 8434 and 8434DX telephones can be used in both a 4-wire and a 2-wire environment.
Note:
In order to use the display on the 8434 or 8434DX telephone and to use an 801A
Note:
expansion module connected to the 8434DX, you must connect an auxiliary
power supply to the telephone.
You can connect an 801A Expansion Module to the 8434DX telephone to provide 24 additional
call appearance/feature buttons.
686 Administrator Guide for Avaya Communication Manager