Specifications

Telephones and speakerphones
344 Hardware Description and Reference for Avaya Communication Manager
AT&T TTY 8840 Analog Telephone
The TTY 8840 is an analog single line telephone that is specifically designed for the
communications needs of either the Hearing or Speech Impaired. It can make voice telephone
calls or TTY calls. Features include:
● 2-line by 24 character LCD display,
● Fastdial directory,
● Handset Volume control,
● visual Ring Flash,
● Ringer,
● Auto Answer,
● Auto Greeting,
● Tone or Pulse dialing, and
● TTY On/Off button to switch between TTY and Tone dialing.
Can be installed behind a digital phone with a tip/ring module. This telephone also provides
access to switch features when in the touch-tone mode. Access to switch features is obtained
by the * or # keys, and the appropriate feature access codes.
AT&T 958 Analog Telephone Caller ID and Speakerphone
The 958 Caller ID Telephone is a single-line analog set that is desk/wall convertible and
requires one tip and ring pair for operation. The 958 telephone features:
● Caller ID/Call Waiting Capability,
● 99 Name/ Number Caller ID History,
● Remove button,
● Message Waiting/New Call Light, and
● 3 line by 15 character Display that supports Call display in English/Spanish/French.
This telephone can be used on Avaya PBXs or Central Office lines. The 958 telephones are
equipped with:
● Hands Free Speakerphone,
● 50 Name/Number Directory,
● data port,
● receiver/speaker volume control,
● Hold buttons,
● FLASH button,
● REDIAL button,