TN791 has 16 ports. Each port supports 1 telephone, such as 500
(rotary dial) and 2500 terminals (DTMF dial). LED and neon message
waiting indicators are supported (a separate power supply is required
for neon message indicators).
TN791 supports on-premises (in-building) wiring with either touch-tone
or rotary dialing and with or without the LED and neon message
TN791 supports 3 ringer loads, only 1 telephone can have an LED
or neon message waiting indicator.
TN791 allows a maximum of 8 simultaneous ports ringing.
supports A-Law and µ-law companding and administrable timers.
Secondary lightning protection is provided.