Avaya Definity TN775B Maintenance Pack (Refurbished) Aastra

Avaya Definity TN775B Maintenance Pack (Refurbished) AastraKey Features: Provides maintenance and monitors power failure signals in an EPN cabinet in R7si r or later. Also monitors clock, monitors and controls power supplies and battery charger, as well as air flow and high temperature sensors Provides two serial links to communicate with expansion interface circuit packs and provides an RS 232 interface for connection to an administration terminal 3 position switch to control emergency power transfer

Mitel 9109-017-001 SX-200 Digital Bay Control Card

16-port digital line card

112 port CPU for Inter-tel Axxess Telephone System

1 or higher

8 Programmable Feature Keys

Comdial DxRng Ring Generator

Eight programmable feature keys provide quick access to lines and features

Avaya Definity TN792 Duplication Interface

Preferred Name Match

handset volume control

optiGuide navigation keys

408 and 816 phone systems