Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Reexamination Certificate
2002-12-23
2004-08-24
Grant, II, Jerome (Department: 2626)
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
C358S426090, C358S426160, C379S100010, C370S449000, C370S467000
Reexamination Certificate
active
06781723
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a communication apparatus, particularly to a facsimile machine which enables a V.34 communication, and to its control method.
2. Related Background Art
Conventionally, in a facsimile machine which enables V.8 and V.34 communications, an ECM communication is requisite to the V.34 communication, and therefore a V.17 or lower transmission is executed if an ECM transmit inhibition is selected and a V.17 or lower reception is executed if an ECM receive inhibition is selected. (If the ECM transmission and the ECM reception are inhibited, a V.34 transmission is not executed.)
However, the above-described conventional apparatus has a disadvantage that, if an execution of a polling communication is received in a state that an ECM transmit inhibition is selected while an ECM receive inhibition is not selected, after transmitting an ANSam signal, receiving a CM signal, transmitting a JM signal, and receiving a CI signal (after an execution of a V.8 protocol) and further after transmitting a line probing signal, transmitting a long training, and exchanging parameters (after an execution of a V.34 protocol), a communication is disconnected, thus causing a disabled polling transmission since a V.34 data transmission is an ECM transmission and the ECM transmission is inhibited.
SUMMARY OF THE INVENTION
Therefore it is an object of the present invention to provide a communication apparatus and its control method which assure an execution of a polling communication in a state that an ECM transmit inhibition is selected while an ECM receive inhibition is not selected for communications in the International Telecommunication Union-Telecommunication (ITU-T) Recommendation V.8, V.21, V.27ter, V.29, V.17, or V.34.
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ITU-T G.511 Series G: Transmission Systems and Media, Digital Systems A ND Networks Testing equipment Test methodology fo Group 3 facsimile procesig equipment in the Public Switched Telephone Network pp. i-vii and 1-35.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Grant II Jerome
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