Olivetti d-Color MF4003 Service Manual page 668

d-Color MF4003/MF3303
bit
123 Internet aware fax device operating in T.38 mode
124 T.89 (Application profiles for ITU-T T.88)
125
126
127 sYCC-JPEG coding
• *3: T.89 (Application profile for ITU-T T.88)
124 125 126
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
8.1.2 Modem fallback sequence
• Fallback sequences of TCF and CTC are shown as follows:
(1) V17, V29, and V27 ter
Ability of a remote station
V27 ter/V29
V27 ter/V29/V33 V17
• On the transmission side: If PPR is received four times, a modem is set in the fallback state.
• On the reception side: In case of sending PPR, when the number of error frames exceeds the FP value, a modem is set in the fallback
state.
(2) V34 fallback
• Line quality is always water by modem. Optimum speed is automatically selected on-the-fly.
8.1.3 V8/V34 sequence
(1) V34
(a) Outline
• The 33.6kbps data transmission method and protocol including the V8 protocol. As for each of full-duplex and half-duplex, startup
handshake until data transmission starts is divided into four phases, phase1 to 4, and signals used in each phase are regulated.
(b) Features
• 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 2400 bps
• 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
Service Manual
Function
Not used
Profile 1
Profile 2
Profile 3
Invalid
Reserved
Reserved
Reserved
96/V.29 -> 72/V.29 -> 48/V.27 ter -> 24/V27 ter
144/V.17 -> 120/V.17 -> 96/V.17 -> 72/V.17 -> 48/V.27 ter -> 24/V27 ter
Contents
Refer to *3.
Contents
TCF fallback sequence
P-94
P THEORY OF OPERATION > 8. FK-517
Y119930-3
Default
0
0
0
0
0