Toshiba GD-1220 Maintains the synchroniza 7E H Tion, Receives an NSF sent from, Transmitter

Page 51

-Control channel

The conventional T.30 procedure is performed. The transmission rate is 1200 bps.

Transmitter

Signal name	Abbreviation	Function	Remarks

Flag	flags	Maintains the synchroniza-	7E (H)
		tion.

Non-standard facilities	NSS	Receives an NSF sent from
setting		the receiver. It selects the
		available mode from the
		received NSF, and specifies
		the mode for the reception.

Transmitting Subscriber	TSI	Informs the telephone number
ID		of the transmitter.

Digital Command Signal	DCS	Specifies the mode that can
		be used for the communica-
		tion.

-	1	Declares to switch to the high-	“1” is sent continuously.
		speed procedure.

Receiver

Signal name	Abbreviation	Function	Remarks

Non-Standard Facilities	NSF	Informs the presence of the
		facilities other than those rec-
		ommended by ITU-T, abbrevi-
		ated user names, and
		manufacturer codes, etc.

Called Subscriber ID	CSI	Informs the telephone number
		of the receiver.

Digital Identification Signal	DIS	Informs the standard facilities
		recommended by ITU-T.

Flag	flags	Maintains the synchroniza-	7E (H)
		tion.

Confirmation for Recep-	CFR	Informs that the training of the
tion		modem is completed, and the
		receiver is ready to receive
		the image signal.

Reference: In the control channel, the frequency of the signals to be sent is different between the transmission and reception. The signal echoed back has never been misidentified as a signal sent from the other side. Therefore, this channel is not influenced by signals echoed back.

3

© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved	GD-1220/1221
	DIALING/COMMUNICATION CONTROL

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Image 51

Contents GD-1220/1221 Page Transportation/Installation Vorsicht Important Service Parts for SafetyContents 2006 2008 Toshiba TEC Corporation All rights reserved System firmware version FAX OptionsGD-1220 GD-1221 Remarks STUDIO165/205 Available STUDIO167/207/237Specifications DBm to 0 dBm Level -55 dBm or lower cannot be detected DBm to -8 dBm The setting can be changed by 1 dBTransmission system EmbeddedDimension width x length Printing area FolioComp Features Specifications and Outline of System 08/08 Accessories and Parts Following accessories and parts come with the FAX unitAccessory Qty Extends the FAX functions when the FAX unit is installed OptionsOption Function Model System List NA/EU/AU/TWADF Radf Units and Components PWA-F-NCU-631 Symbol Name FunctionLayout of PC Boards FAXRecording paper size LSU-RELATED FunctionsSize Horizontal x Vertical Effective recording area Effective recording area297 x 293 x A4-R 210 x 206 x A5-R 148 x 144 x 257 x 253 x For MJD, AUD, ASD, SAD, TWD, and CND models Unit mm inchInch Feed direction Mm 0.16 inch Effective recording area Size Horizontal x Vertical Effective recording rangePrint mode Recording paper selection algorithm and print algorithm Recording paper selection algorithmPrint algorithm Judgment parameter Reception print flowchart Start Receive FAXBit Discard parameter Discard printingVertical reduction print Similar reduction print RTI Scanning width For MJD, AUD, ASD, SAD, TWD, CND modelsScanning ST-R CompFor MJD, AUD, ASD, SAD, TWD, and CND models Recording paper rangeRecording paper range A4-R Folio Folio *1 Recording paper range LT long Comp long LD longComp *2 Comp *1 Recording paper range A4 long B4 long A3 longError processing Order Drawer Limitations on reception printLSU-RELATED Functions Standby state Circuit Connection and Procedure to Change ModeDial call-up transmission to a telephone circuit YESTelephone circuit Selection of the communication modeProcedure to select the transmission mode Communication mode Toshiba original procedureSignal name Signal form Signaling System Diagram and Signal FormsCircuit control signals This signal can be sent manually Signal formReceiver Communication with the binary signalsImage signal Mode change is possible only for the original set manuallyFrames received Error occurred Only error frame retransmitted 1 completed 2 completedCED Nsfcsidis CFRMCF Binary signals PRI-MPS PIPPIN PRI-EOMWhen this frame is the last frame, X = FCF FIF FCSFormat Binary signal Format FCF format of each binary signal9600 bps, 7200 bps 4800 bps, 2400 bpsTCF 3 V.8/V.34 communication sequence Line closed Standard procedure Transmitter ReceiverSignal name Abbreviation Function Remarks Frequency transmission Capability Tone signal betweenHz and 3,750 Hz in units 150 HzALT TRNReceiver Maintains the synchroniza 7E H TionReceives an NSF sent from TransmitterEncoded image data Turn off Scrambled 1 is sent for Image data Image data are sent. TransmitterScrambled data frame to be Is completedInforms to disconnect the line Short training SignalPPS-EOP Transmission of one Is completedLine closed DIS cannot be recognized DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control General functions FAX Automatic SwitchingTEL mode FAX modeDIALING/COMMUNICATION Control GD-1220/1221 ConfigurationDescription of Circuits ConfigurationEU/AU/AS/C models ATT3DB1 Line path switching control circuitSignal Name Type Active Description Destination CML1RLY3, IC3 IC3IC5 Dial pulse generation circuit Line 1 Dial Pulse Generation Signal Q53Line 1 Dial Pulse Generation Signal REVA1 Line Current Detection Signal IC23Line Reverse Current Detection Signal IC23 Line current detection circuitCurrent Reverse Line 1 Current Detection IC23 Signal Line 1 Current Detection Signal IC23CI detection circuit Line 1 CI Detect Signal IC23Line 1 CI Detection Signal IC23 FAX board Line monitor circuitLOW High Monitoring signalRinger/Alarm Line MonitorSound volume PWA-F-FAX-635 GD-1220 PC BoardsPWA-F-FAX-678 GD-1221 PWA-F-NCU-631 NAD, TWD, SAD PWA-F-NCU-631 MJD, AUD, ASD, CND Electrical Circuits Explanation to the Users InstallationInstallation

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