The functional features include a non-polar two-wire bus integrating communication and call functions to reduce cabling costs, supporting up to 100 TN3100 fire telephone extensions with 3 simultaneous calls, 9-hour call recording, 999 pieces of information storage with time/type query, a 128×64 B&W LCD displaying 32 Chinese characters and USB offline programming for phone locations, as well as USB device information download/upload.
Rated Voltage DC24V (range: DC20V~28V)
Operating Current ≤600mA
Capacity 128 address points (1~128)
Voice Frequency 300Hz~3400Hz
Crosstalk Level < -60dB
Transmission Loss <5dB
Loop Resistance <300Ω
Communication Distance <1000m
Dimensions 483mm×200mm×89mm
Weight ~3.0kg
Temperature 0°C~+40°C
Relative Humidity ≤95% (non-condensing)