Konica Minolta FK-502 Service Manual page 140

PROTOCOL
• Full-duplex (echo canceler method) / Half-duplex method are regulated (for data / FAX respectively)
• 2400, 3000 and 3200 symbols / sec (mandatory) and 2743, 2800 and 3429 symbols / sec (option) QAM
synchronous transmission at each symbol rate
• Communication at each signal rate of 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800,
14400, 12000, 9600, 7200, 4800 and 2400bps
• Four-dimensional-symbol trellis coding
• A 200bps sub channel which can be used as an asynchronous second channel (option)
• Negotiation in which characteristics of a line is measured before transmission starts and the maximum
communication speed is achieved by finely adjusting the transmission parameter, based on the result of
measurement (carrier / frequency / equalizer / symbol rate / level, etc.)
• Data transmission in the super frame with the hierarchical structure
(2) sample of a signal procedure at sending two pages
(2-1) Beginning of communications to beginning of 1st page transmission
Change and determination
of the V 8 communication
ability and directions
Call
Terminal
CNG CM CJ
Answer
Terminal
ANSam JM
Network Interaction
Note - The string of consecutive 1s shall be followed by the 4T of scrambled ones defined in 12.6.3/V34.
(2-2) Signals between pages
Source Terminal
Recipient Terminal
7-14
Phase 2
Determination of the Modulation
Mode for measuring line Control channel startup
(establishment) procedure
characteristics, and then Phase 3
(main channel speed determination, etc.)
measurement Training of equalizer
75 5ms 70 5ms 70 5ms
PPh ALT MPh MPh E
B B L1 L2 B S S PP TRN
PPh ALT MPh MPh E NSF CSI DIS
A A A
75 5ms
Primary
Channel
Modern Parameter
Equalizer
Line Probing Training
Control channel re-synchronization procedure
Image
Sh
Sh
Data
Sh
FK-502/Network Fax Service Manual Ver.3.0
Main channel re-synchronization procedure
(establishment of main channel)
"1"
Flags TSI DCS Flags
(Note)
CFR
Flags
Exchange T.30 Fax Handshaking
ALT Flags
E
ALT Flags
Flags MCF
Sh E
70 5ms
Image
S S PP B1
Data
Primary
Channel
Resync.
Main channel re-synchronization procedure
Image
"1" S S PP B1
Data