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-premises.

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