2-20 Phaser 3300MFP Service Manual
Theory of Operation
Modem (SFX336) specification.
■ 2-wire half-duplex fax modem modes with send and receive data rates up
to 33.600 bps
■ V.17, V.34, V.29, V.27 ter, and V.21 Channel 2
■ Short train option in V.17 and V.27 ter
■ PSTN session starting
■ V.8 and V.8 bis signaling
■ HDLC support at all speeds
■ Flag generation, 0-bit stuffing, ITU CRC-16 or CRC-32 calculation and
generation
■ Flag detection, 0-bit deletion, ITU CRC-16 or CRC-32 check sum error
detection
■ FSK flag pattern detection during high-speed receiving
■ Tone modes and features
■ Programmable single or dual tone generation
■ DTMF receiver
■ Tone detection with three programmable tone detectors
■ Receive dynamic range:
■ 0 dBm to -43 dBm for V.17, V.29, V.27 ter and V.21 Channel 2
■ 9 dBm to -43 dBm for V.34 half-duplex
■ Digital speaker output to monitor received signal
■ Two 16-byte FIFO data buffers for burst data transfer with extension up to
255 bytes
■ V.21 Channel 1Flag detect
■ V.21 Channel 1Flag detect
■ +3.3 V only operation
■ Typical power consumption
■ Normal mode: 264 mW
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