Fax - Xerox WorkCentre 3210 Service Manual

Fax

WorkCentre 3210/3220 Multifunction Printer Service Manual
Fax is implemented by a conexant DAA (Data Access Arrangement) solution
and is roughly composed of two kinds:
CX86710 (SFX336)): A modem chip which adds SSD (System Side
Device) for interfacing between LSD and DIB of FM336Plus Core.
CX20493 (LSD): LIU (Line Interface Unit) chip controlled by SSD and
satisfies each PSTN requirements by modulating internal configuration
with connecting telephone line.
Modem
CX86710(SFX336)
DSP
MC14051BD
Volume/Keyclick
Control
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.8b is 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
Transformer
SSD
System
Side
Device
Transformer
MC34119DR2
Speaker
Driver
Sound Output
Theory of Operation
CX20493
LSD Tel Line
Line
Ext Line
Side
Device
LIU
SDAA
s3210mfp-143
2-29