Fax machine and method of performing handshaking process based on T.30 protocol
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-sang Seo, Chang-min Han
Life of this patent
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Abstract
A method of performing handshaking between fax machines on the basis of T.30 protocol includes transmitting information on a first data rate selected to transmit a fax document to a receiving-side fax machine, transmitting a plurality of frames including bit strings predefined to test data transmission/reception at the first data rate prior to transmitting the fax document to the receiving-side fax machine, and receiving a message informing success or failure of the test. The transmitting of the frames includes determining a time duration of the transmitting the frames based on at least one of a TCF flag value and the first data rate.
Claims20
A method of performing handshaking between fax machines on the basis of T.30 protocol, wherein a sending-side fax machine:
- transmits information on a first data rate selected to transmit a fax document, to a receiving-side fax machine;
- transmits a plurality of frames including one or more bit strings to the receiving-side fax machine, which are predefined to test data transmission/reception at the first data rate prior to transmitting the fax document;
- and
- receives a message informing success or failure of the test, and
- wherein the transmitting of the frames comprises determining a time duration of the transmitting the frames based on at least one of a TCF flag value set to the sending-side fax machine and the first data rate.
A sending-side fax machine to perform handshaking with a receiving-side fax machine on the basis of T.30 protocol, the fax machine comprising:
- a scanning module to scan a fax document to be transmitted;
- a storage unit to store the scanned fax document;
- a network interface to transmit the fax document through a public switched telephone network (PSTN) or a voice over internet protocol (VoiP) network;
- and
- a control unit to control the network interface to transmit information on a first data rate selected to transmit the fax document to the receiving-side fax machine, to transmit a plurality of frames including one or more bit strings predefined to test data transmission/reception at the first data rate prior to transmitting the fax document to the receiving-side fax machine, and to
- receive a message informing success or failure of the test,
- wherein the control unit determines a time duration of the transmitting the frames based on at least one of a TCF flag value set to the sending-side fax machine and the first data rate.
Dependencies are inferred from the claim text.