Telephone Interface TI-101

The Radio Systems Inc. Telephone Interface TI-101 has the following features:

• Input impedance 16.7K ohms (Electronically balanced)
• Output Impedance >600 ohms (Transformer Balanced)
• Telephone Port Impedance 560 ohms (Transformer Isolated)
• Nominal Input and Output Level Ranges Switchable between -10 dBm and +8 dBm
• CMRR >4 dB at Input @ 1 kHz
• Maximum Input Level +21 dBm
• Maximum Output Level +20 dBm
• Typical THD .1%
• Controls - Send Level, send limit, receive level receive compress/expand 400 Hz and 2.5 Hz. Equalization, conference link, coarse, low frequency and high frequency null adjust
• Visual Indicators - LED’s for indication of send, clip, send limit, receive, clip, receive compress/expand, receive mute, and power on
• Frequency response - 300 Hz to 3k Hz +/-3 dB (measured from telephone port to output port)
• Typical Transhybrid loss - 20 dB over the specified frequency bandwidth
• Connectors - 3 pin XLR type for input and output ports, barrier terminal strip for telephone tip and ring, 1/4" phone jacks for external mute and conference interconnect cables

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