Oki OKIFAX 5750 Service Manual page 899

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L 16 kHz LPF (L7, L8, C7, C507, C9)

This low-pass filter removes 16 kHz metering pulses.

M Transmitter amplifier (IC501 1/2)

This transmitter buffer amplifier amplifies DTMF signals and FAX send signals.

N Receiver amplifier (IC501 2/2)

This amplifier amplifies MF tones, dial tones, and FAX receive signals.

O 16 kHz LPF (IC502)

This active low-pass filter removes 16 kHz metering pulses.

P PBXE (RL4)

This circuits connects one end of the LINE terminal to the PBXE terminal when requested from the PBX line.

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