Avaya Definity TN2793B 24-Port Analog Circuit Pack (Refurbished)Key Features: Dual coded, 24 port analog line that performs all the functions of the TN746B, 16 port analog line circuit pack Each port supports 1 voice terminal such as 500 and 2500 terminals Supports on premises wiring with either touch tone or rotary dialing and with or without the LED and neon message waiting indicators Supports off premises wiring with either DTMF or rotary dialing, but LED or neon message waiting indicators are not supported off