EP0374949A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Communication device connected to telephone line
Assignee: Sanyo Electric Co Ltd
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Filing: 1989-12-22
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Granted: —
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Expires: 2009-12-22
Abstract
Abstract A communication device such as a video telephone (7,12) is connected to a telephone line (4,5) together with a telephone set (6,11) at both parties. In response to an operation for removing a handset from a hook of the telephone set (6) at this party, the video telephone (7) at this party is initiated. Each of the video telephones includes a mode selecting switch (22) and DTMF receiver (26) which receives a DTMF signal from one of the telephone sets and decodes a received DTMF signal to output data representative of the mode of the video telephone. When a flag "1" is set, a mode of the video telephone (7) at this party can be controlled in response to the DTMF signal which is received by the DTMF receiver (26) from the telephone set (6) at this party and, when a flag "2" is set a mode of the video telephone (7) at this party can be controlled in response to the DTMF signal which is received by the DTMF receiver (26) from the telephone set (11) at the other party.
Inventors
- 👤 Tsutomu Fujita
- 👤 Yoshinobu Ido
- 👤 Tsuneyoshi Yamada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:21
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/14; H04N7/141; H04N7/147; H04M; H04M11/00; H04M11/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A communication device (7) connected to a telephone line (4,5) together with a telephone set (6), comprising: switch means (22) for selectively switching an operation mode; identifying means (26) for distinguishably identifying a request for communication which is outputted from a first telephone set (6) arranged integrally with or adjacent to the communication device (7) or a request for communication which is outputted from a second telephone set (11) arranged at a remote point and relayed through said telephone line to be connected to said communication device; and control means (21) for controlling said switch means to switch the operation mode in accordance with a result of the identification by said identifying means.
Claim 2
Dependent Claim
113 words
A communication device (7) connected to a telephone line (4,5) together with a telephone set (6), comprising: switch means (22) for selectively switching an operation mode; identifying means (26) for distinguishably identifying a request for communication which is outputted from a first telephone set (6) arranged integrally with or adjacent to the communication device (7) or a request for communication which is outputted from a second telephone set (11) arranged at a remote point and relayed through said telephone line to be connected to said communication device; and control means (21) for controlling said switch means to switch the operation mode in accordance with a result of the identification by said identifying means.
Claim 3
Dependent Claim
44 words
A communication device in accordance with claim 1, wherein said control means (21) includes allowing means for allowing the first telephone set to control the switch means (22) in response to the identification of a request for communication from the first telephone set (6).
Claim 4
Dependent Claim
34 words
A communication device in accordance with claim 2, further comprising a further switch (19) which is so constructed as to be set in an active state in response to an operation for starting communication.
Claim 5
Dependent Claim
45 words
A communication device in accordance with claim 1, wherein said control means (21) includes further allowing means for allowing the second telephone set to control the switch means (22) in response to the identification of a request for communication from the second telephone set (11).
Claim 6
Dependent Claim
57 words
A communication device in accordance with claim 4, wherein said first telephone set (6) is initiated in response to a calling operation of said second telephone set (11), and further comprising a further switch (19) which is so constructed as to be set in an active state in response to an initiation of said first telephone set.
Claim 7
Dependent Claim
105 words
A communication device (7) connected to a telephone line (4,5) together with a telephone set (6), comprising: switch means (22) for selectively switching an operation mode; first receiving means (26) for receiving a specified signal from a first telephone set arranged integrally with or adjacent to the communication device; second receiving means (26) for receiving an operation mode designating signal which is outputted from said first telephone set in succession to said specified signal; and control means (21) for controlling said switch means (22) to switch the operation mode in response to the reception of said operation mode designating signal by said second receiving means.
Claim 8
Dependent Claim
105 words
A communication device (7) connected to a telephone line (4,5) together with a telephone set (6), comprising: switch means (22) for selectively switching an operation mode; first receiving means (26) for receiving a specified signal from a first telephone set arranged integrally with or adjacent to the communication device; second receiving means (26) for receiving an operation mode designating signal which is outputted from said first telephone set in succession to said specified signal; and control means (21) for controlling said switch means (22) to switch the operation mode in response to the reception of said operation mode designating signal by said second receiving means.
Claim 9
Dependent Claim
37 words
A communication device in accordance with claim 5, said specified signal is a signal to a head of which a DTMF signal representative of a sign not assigned to a telephone number for a subscriber's telephone set.
Claim 10
Dependent Claim
29 words
A communication device in accordance with claim 7, wherein said operation mode designating signal is a DTMF signal representative of a numerals or a sign other than said sign.
Claim 11
Dependent Claim
34 words
A communication device in accordance with claim 8, further comprising further switch means (19) which is so constructed as to be set in an active state in response to an operation for starting communication.
References Cited (Backward Citations)
No citation records indexed.
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