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US6021183A
Expired / Lapsed
US
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Communication apparatus and method having V. 8 procedure function
Assignee: Canon Inc
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Filing: 1997-10-28
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Granted: 2000-02-01
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Expires: 2017-10-28
Abstract
Abstract According to a this invention, a line is acquired in response to reception from the line. An ANSam signal of a V. 8 procedure is sent out to the line in response to acquisition of the line. When a CM signal is received within a predetermined period of time after the start of sending out of the ANSam signal, the V. 8 procedure sequence is continued. When the CM signal is not received within the predetermined period of time, sending of the ANSam signal is stopped, and the sequence is shifted to a sequence using another communication procedure (T. 30 procedure) different from the V. 8 procedure. The predetermined period of time for monitoring reception of the CM signal while sending out the ANSam signal is changed in accordance with the execution state of the communication sequence. Upon automatic reception, the V. 8 procedure can be appropriately executed, and a shift in sequence from the V. 8 procedure to another communication procedure (e.g., T. 30 procedure) can be performed within a short time period.
Inventors
- 👤 Takehiro Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:49
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/333; H04N1/33346; H04N1/33392; G; G06; G06F; G06F2213/00; G06F2213/0038; H04N2201/00; H04N2201/0077; H04N2201/0093
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
232 words
A communication apparatus with a V. 8 procedure function, comprising: acquisition means for acquiring a communication line in response to a reception from the communication line; sending means for sending out, to the communication line, an ANSam signal of the V. 8 procedure in response to the acquisition of the communication line by said acquisition means; first detection means for detecting a presence/absence of a reception of a CM signal from the communication line during the sending out of the ANSam signal; control means for continuing a V. 8 procedure sequence when the CM signal is received within a predetermined period of time after starting the sending out of the ANSam signal, and for stopping the sending out of the ANSam signal to shift a sequence from the V. 8 procedure to another communication procedure when the CM signal is not received within the predetermined period of time; second detection means for detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing means for changing the predetermined period of time for monitoring reception of the CM signal while sending out the ANSam signal, in accordance with detection of the permission for the partner's apparatus to execute the V. 8 procedure by means of said second detection means after the sequence is shifted from the V.8 procedure to the other communication procedure by means of said control means.
Claim 2
Dependent Claim
232 words
A communication apparatus with a V. 8 procedure function, comprising: acquisition means for acquiring a communication line in response to a reception from the communication line; sending means for sending out, to the communication line, an ANSam signal of the V. 8 procedure in response to the acquisition of the communication line by said acquisition means; first detection means for detecting a presence/absence of a reception of a CM signal from the communication line during the sending out of the ANSam signal; control means for continuing a V. 8 procedure sequence when the CM signal is received within a predetermined period of time after starting the sending out of the ANSam signal, and for stopping the sending out of the ANSam signal to shift a sequence from the V. 8 procedure to another communication procedure when the CM signal is not received within the predetermined period of time; second detection means for detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing means for changing the predetermined period of time for monitoring reception of the CM signal while sending out the ANSam signal, in accordance with detection of the permission for the partner's apparatus to execute the V. 8 procedure by means of said second detection means after the sequence is shifted from the V.8 procedure to the other communication procedure by means of said control means.
Claim 3
Dependent Claim
45 words
An apparatus according to claim 1, wherein said changing means selects one of a first time coinciding with a sending time of the ANSam signal that is defined in a recommendation of the V. 8 procedure and a second time shorter than the first time.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 2, wherein said changing means changes the predetermined period of time from the second time to the first time.
Claim 5
Dependent Claim
33 words
An apparatus according to claim 1, wherein said changing means changes the predetermined period of time when the sequence is changed to the other communication procedure and then to the V. 8 procedure.
Claim 6
Dependent Claim
48 words
An apparatus according to claim 4, wherein said changing means changes the predetermined period of time when communication in which the sequence is shifted to the other communication procedure in response to a reception and then to the V. 8 procedure is performed a predetermined number of times.
Claim 7
Dependent Claim
218 words
A communication apparatus with a V. 8 procedure function, comprising: acquisition means for acquiring a communication line in response to a reception from the communication line; sending means for sending out, to the communication line, an ANSam signal of the V. 8 procedure within a first time period after acquisition of the communication line by said acquisition means; first detection means for detecting a presence/absence of reception of a CM signal from the communication line during the sending out of the ANSam signal; control means for continuing a V. 8 procedure sequence when the CM signal is received within a second time period after starting the sending out of the ANSam signal and for stopping the sending out of the ANSam signal to shift a sequence from the V. 8 procedure to another communication procedure when the CM signal is not received within the second time period; second detection means for detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing means for changing the first time period, in accordance with detection of the permission for the partner's apparatus to execute the V. 8 procedure by means of said second detection means after the sequence is shifted from the V. 8 procedure to the other communication procedure by means of said control means.
Claim 8
Dependent Claim
218 words
A communication apparatus with a V. 8 procedure function, comprising: acquisition means for acquiring a communication line in response to a reception from the communication line; sending means for sending out, to the communication line, an ANSam signal of the V. 8 procedure within a first time period after acquisition of the communication line by said acquisition means; first detection means for detecting a presence/absence of reception of a CM signal from the communication line during the sending out of the ANSam signal; control means for continuing a V. 8 procedure sequence when the CM signal is received within a second time period after starting the sending out of the ANSam signal and for stopping the sending out of the ANSam signal to shift a sequence from the V. 8 procedure to another communication procedure when the CM signal is not received within the second time period; second detection means for detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing means for changing the first time period, in accordance with detection of the permission for the partner's apparatus to execute the V. 8 procedure by means of said second detection means after the sequence is shifted from the V. 8 procedure to the other communication procedure by means of said control means.
Claim 9
Dependent Claim
39 words
An apparatus according to claim 6, wherein the second time period is a time period shorter than a time coinciding with a sending time of the ANSam signal that is defined in a recommendation of the V. 8 procedure.
Claim 10
Dependent Claim
227 words
A communication method for a communication apparatus with a function of a V. 8 procedure and a function of another communication procedure different from the V. 8 procedure, comprising the steps of: acquiring a communication line in response to a reception from the communication line; sending out an ANSam signal of the V. 8 procedure to the communication line in response to the acquisition of the communication line; detecting a presence/absence of a reception of a CM signal from the communication line during sending out of the ANSam signal; continuing a V. 8 procedure sequence when the CM signal is received within a predetermined period of time after starting the sending out of the ANSam signal, and stopping the sending out of the ANSam signal and shifting a sequence from the V. 8 procedure to the other communication procedure when the CM signal is not received within the predetermined period of time; detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing the predetermined period of time for monitoring reception of the CM signal while sending out the ANSam signal, in accordance with the detection of the permission for the partner's apparatus to execute the V. 8 procedure after the sequence is shifted from the V.8 procedure to the other communication procedure by the step of continuing the V. 8 procedure sequence.
Claim 11
Dependent Claim
227 words
A communication method for a communication apparatus with a function of a V. 8 procedure and a function of another communication procedure different from the V. 8 procedure, comprising the steps of: acquiring a communication line in response to a reception from the communication line; sending out an ANSam signal of the V. 8 procedure to the communication line in response to the acquisition of the communication line; detecting a presence/absence of a reception of a CM signal from the communication line during sending out of the ANSam signal; continuing a V. 8 procedure sequence when the CM signal is received within a predetermined period of time after starting the sending out of the ANSam signal, and stopping the sending out of the ANSam signal and shifting a sequence from the V. 8 procedure to the other communication procedure when the CM signal is not received within the predetermined period of time; detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing the predetermined period of time for monitoring reception of the CM signal while sending out the ANSam signal, in accordance with the detection of the permission for the partner's apparatus to execute the V. 8 procedure after the sequence is shifted from the V.8 procedure to the other communication procedure by the step of continuing the V. 8 procedure sequence.
Claim 12
Dependent Claim
47 words
A method according to claim 8, wherein the step of changing comprises selecting one of a first time coinciding with a sending time of the ANSam signal that is defined in a recommendation of the V. 8 procedure and a second time shorter than the first time.
Claim 13
Dependent Claim
26 words
A method according to claim 9, wherein the step of changing comprises changing the predetermined period of time from the second time to the first time.
Claim 14
Dependent Claim
35 words
A method according to claim 8, wherein the step of changing comprises changing the predetermined period of time when a sequence is changed to the other communication procedure and then to the V. 8 procedure.
Claim 15
Dependent Claim
50 words
A method according to claim 11, wherein the step of changing comprises changing the predetermined period of time when communication in which a sequence is shifted to the other communication procedure in response to a reception and then to the V. 8 procedure is performed a predetermined number of times.
Claim 16
Dependent Claim
32 words
An apparatus according to claim 1, wherein said second detection means detects that the partner's apparatus is permitted to execute the V. 8 procedure based on a reception of a CI signal.
Claim 17
Dependent Claim
32 words
An apparatus according to claim 6, wherein said second detection means detects that the partner's apparatus is permitted to execute the V. 8 procedure based on a reception of a CI signal.
Claim 18
Dependent Claim
201 words
A communication method for a communication apparatus with a V. 8 procedure function, comprising the steps of: acquiring a communication line in response to a reception from the communication line; sending out, to the communication line, an ANSam signal of the V. 8 procedure within a first time period after acquisition of the communication line is said acquiring step; detecting a presence/absence of reception of a CM signal from the communication line during the sending out of the ANSam signal; continuing a V. 8 procedure sequence when the CM signal is received within a second time period after starting the sending out of the ANSam signal, and stopping the sending out of the ANSam signal to shift a sequence from the V. 8 procedure to another communication procedure when the CM signal is not received within the second time period; detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing the first time period, in accordance with detection of the permission for the partner's apparatus to execute the V. 8 procedure after the sequence is shifted from the V. 8 procedure to the other communication procedure in said step of continuing the V. 8 procedure sequence.
Claim 19
Dependent Claim
201 words
A communication method for a communication apparatus with a V. 8 procedure function, comprising the steps of: acquiring a communication line in response to a reception from the communication line; sending out, to the communication line, an ANSam signal of the V. 8 procedure within a first time period after acquisition of the communication line is said acquiring step; detecting a presence/absence of reception of a CM signal from the communication line during the sending out of the ANSam signal; continuing a V. 8 procedure sequence when the CM signal is received within a second time period after starting the sending out of the ANSam signal, and stopping the sending out of the ANSam signal to shift a sequence from the V. 8 procedure to another communication procedure when the CM signal is not received within the second time period; detecting that a partner's apparatus is permitted to execute the V. 8 procedure; and changing the first time period, in accordance with detection of the permission for the partner's apparatus to execute the V. 8 procedure after the sequence is shifted from the V. 8 procedure to the other communication procedure in said step of continuing the V. 8 procedure sequence.
Claim 20
Dependent Claim
39 words
A method according to claim 15, wherein the second time period is a time period shorter than a time coinciding with a sending time of the ANSam signal that is defined in a recommendation of the V. 8 procedure.
Claim 21
Dependent Claim
32 words
A method according to claim 15, wherein said step of detecting that the partner's apparatus is permitted to execute the V. 8 procedure is based on a reception of a CI signal.
Claim 22
Dependent Claim
32 words
A method according to claim 8, wherein said step of detecting that the partner's apparatus is permitted to execute the V. 8 procedure is based on a reception of a CI signal.
References Cited (Backward Citations)
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