Toshiba Model: GD-1150, GD-1260, GD-1160, GD-1201, GD-1151 3 V.8/V.34 communication sequence

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3.2.3V.8/V.34 communication sequence

1)Outline

-V.8 is performed as a startup procedure to switch to V.34. V.8 can connect an existing facsimile machine to the equipment using a data modem or other V-series modems. The V.34 modem has a modem circuit previously recommended, allowing it to be also connected to the existing modems while they are upper compatible.

-New technologies such as the pre-emphasis technology *1 and the probing technology *2 are fully used. The pre-emphasis technology *1 not only speeds up the modulation, but also gains the S/N ratio. The probing technology examines the line characteristics and optimizes the modem for the line condition. Therefore, not only do these technologies speed up the transmis- sion momentarily, but also the average speed of the process during the data transmission is increased.

-For V.8 and the pre/post-FAX transmission for V.34, the procedure is speeded up by the full duplex communication.

-Following 14 types of the image transmission speed are available: *3

33.6kbps/31.2 kbps/28.8 kbps/26.4 kbps/24.0 kbps/21.6 kbps/19.2 kbps/16.8 kbps/14.4 kbps/

12.0kbps/9.6 kbps/7.2 kbps/4.8 kbps/2.4 kbps

-The modulating speed (baud rate) *4 can be selected from 2,400, 3,000, 3,200 symbol/sec (man- datory), or 2,743, 2,800, 3,429 symbol/sec (option). The data rate can be set more accurately than the conventional modem.

*1 A signal is sent while raising the output level in the high-frequency band in which the noise

:is relatively loud.

*2 Tone signal called “Probing Tone” is sent for the receiver to examine the line characteris-

:tics of the line.

*3 In the ITU-T Recommendation, it is described as “data rate”. “Image transmission speed”

:is the same as “data rate”.

*4 In the ITU-T Recommendation, it is described as “symbol speed”. The “Symbol rate”,

:“Modulating speed”, and “Baud rate” are the same thing. This machine cannot realize the speed of 2,743 symbol/sec.

Notes:

1.ECM is used in the V.34 procedure. If the setting for the ECM transmission/reception of the user data is set to “Not performed”, the V.8 procedure is not performed and the procedure is not switched to V.34. V.17 or lower is selected in this case.

2.When the transmission/reception speed is set to 14.4 kbps or slower, the V.8 procedure is not performed, and V.17 or lower is selected.

3.See “Late start (P3-20)” to move to the V. 8/V.34 procedure after starting with the V.21 proce- dure.

4.After the V.34 procedure is started, the fallback for the V.34 procedure is performed. However, the fallback for the V.17 mode or lower mode is not performed.

3

© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved

GD-1150/1151/1200/1201/1160/1260

 

DIALING/COMMUNICATION CONTROL

3 - 13

04/06

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Contents GD-1150/1151/1200/1201/1160/1260 Trademarks STUDIO3511/4511 Model Weight Number of peopleSTUDIO281c/351c/451c Service of Machines Precautions against Static Electricity Page Contents 2003 2008 Toshiba TEC Corporation All rights reserved FAX unit 2nd line for FAX board FAX OptionsOriginal size SpecificationsFolio Transmission system DBm to -8 dBm The setting can be changed by 1 dBEmbedded DBm to 0 dBm Level -55 dBm or lower cannot be detectedComp Dimension width x length Printing areaFeatures Specifications and Outline of System Following accessories and parts come with the FAX unit Accessories and PartsQty STUDIO230/280 OptionsSTUDIO281c/351c/451c Option Function ModelSTUDIO202L/203L/232/233/282/283 series STUDIO352/353/452/453GD-1260NA/TW/EU/C GD-1150NA/TW/EU AU/AS/C System ListGD-1150NA/TW/EU Bridge Kit KN-3511 FAX Board GD-1200 Finisher Hanging type e-STUDIO352/353 only MJ-1022 GD-1150NA/TW/EU AU/AS/C/KR Units and Components Layout of PC Boards Symbol Name Function RemarksFAX MDM NCU FAXSTUDIO281c/351c/451c, e-STUDIO352/353/452/453 FAX power board Supplies the power -12V, +24VMDM FAX FAX PWR NCU FAX control board Controls the FAX functionSpecifications and Outline of System LSU-RELATED Functions Recording ModeRecording paper selection algorithm Recording Paper Selection Algorithm and Printing AlgorithmPrinting algorithm ST against A3/B4/A4/LD/LT size originals respectively Discard function Length of B Discard parameter Set value Effective printing lengthOFF A5 , Comp LT, Comp COMP, LD LG/LT, LD ST, Folio B5, Folio B4, A3 A4, B4 B5, B4 A5, A4Setting for the split recording Recording Paper and Function Others Table of the recording paper selection modesPriority User Functions Energy Saver ModeReceiving FAX document, or by Energy SaverMemory Reception Dial call-up transmission to a telephone circuit Circuit Connection and Procedure to Change ModeYES Standby stateProcedure to select the transmission mode Selection of the communication modeCommunication mode Toshiba original procedure Telephone circuitCircuit control signals Signaling System Diagram and Signal FormsThis signal can be sent manually Signal form Signal name Signal formCommunication with the binary signals Mode change is possible only for the original set manually Image signalMode change possible Informing that there is the next ReceiverFrames received Error occurred Only error frame retransmitted 1 completed 2 completedCED Nsfcsidis JOB Status button Cancel buttonCFR MCFBinary signals PIN PIPPRI-EOM PRI-MPS FCF FIF FCS When this frame is the last frame, X = Format Binary signal Format FCF format of each binary signal4800 bps, 2400 bps 9600 bps, 7200 bpsTCF 3 V.8/V.34 communication sequence Line closed Standard procedure Transmitter ReceiverSignal name Abbreviation Function Remarks Hz and 3,750 Hz in units Tone signal between150 Hz Data transmissionALT TRNMaintains the synchroniza 7E H Tion FlagReceives an NSF sent from TransmitterScrambled data frame to be Image data Image data are sent. TransmitterIs completed Encoded image data Turn off Scrambled 1 is sent forPPS-EOP Short training SignalTransmission of one Is completed Flag Informs to disconnect the lineLine closed DIS cannot be recognized DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control TEL mode FAX Automatic SwitchingFAX mode General functionsElectrical Circuits ConfigurationFAX PWR STUDIO202L/203L/232/233/282/283 GD-1151 GD-1260 95C265 4Mbit x MN86064 Description of Circuits ConfigurationEU/AU/AS/C models Signal Name Type Active Description Destination Line path switching control circuitCML1 ATT3DB1IC3 RLY3, IC3IC5 Dial pulse generation circuit Line 1 Dial Pulse Generation Signal Q53Line 1 Dial Pulse Generation Signal Line Reverse Current Detection Signal IC29 IC26 Line Current Detection Signal IC29 IC26Line current detection circuit REVA1Current Reverse Line 1 Current Detection IC29 IC26 Signal Line 1 Current Detection Signal IC29 IC26CI detection circuit Line 1 CI Detect Signal IC29 IC26Line 1 CI Detection Signal IC29 IC26 NCU board Line1 Line monitor circuitRinger/Alarm Monitoring signalLine Monitor LOW HighSound volume Relation between the signals and sound volume is as followsPWA-F-FAX-562 / PWA-F-FAX-610 PC BoardsPWA-F-FAX-670 PWA-F-NCU-US-562/PWA-F-NCU-631-US PWA-F-MDM-563 PWA-F-NCU-EU-562/PWA-F-NCU-631-EUPWA-F-MDM-631 PWA-F-FAX-POWER-610PWA-F-FAX-POWER-631 Electrical Circuits Explanation to the Users InstallationInstallation
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