US5065427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fax/data call receiving system and method
Assignee: VISHWAS R GODBOLE D/B/A NAVIN SYSTEMS
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Filing: 1989-10-31
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Granted: 1991-11-12
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Expires: 2009-10-31
Abstract
Abstract System and method for receiving facsimile calls and data modem calls with a single telephone line. An incoming call is monitored for a first period of time following receipt of the call to identify the call as either a facsimile call or a data modem call, and a handshaking procedure is initiated if the call is identified. In the event that the call is not identified, a data modem handshaking procedure is initiated, and if that procedure is not successful, the call is assumed to be a facsimile transmission, and a facsimile handshaking procedure is initiated. When the type of call has been identified, appropriate FAX or data communications software is automatically selected for processing the particular type of call.
Inventors
- 👤 Vishwas R. Godbole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:51
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/327; H04N1/32704; H04N1/32706; H04N1/32713; H04M; H04M11/00; H04M11/06; H04N1/32715; H04N1/32719; H04N1/32726; H04N1/32732
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
In a system for receiving calls from a facsimile machine and from a data modem: a facsimile call detector, a data call detector, means active upon receipt of a call for monitoring the outputs of the facsimile call detector and the data call detector for a first period of time to identify the type of call received, means for initiating a handshaking procedure corresponding to the type of call received if either a facsimile call or a data call is identified during the first period of time, means for initiating a data modem handshaking procedure for a second period of time in the event that the call is not identified as either a facsimile call or a data call during the first period of time, and means active after the second period of time for initiating a facsimile call handshaking procedure in the event that the data modem handshaking procedure is not successful.
Claim 2
Dependent Claim
153 words
In a system for receiving calls from a facsimile machine and from a data modem: a facsimile call detector, a data call detector, means active upon receipt of a call for monitoring the outputs of the facsimile call detector and the data call detector for a first period of time to identify the type of call received, means for initiating a handshaking procedure corresponding to the type of call received if either a facsimile call or a data call is identified during the first period of time, means for initiating a data modem handshaking procedure for a second period of time in the event that the call is not identified as either a facsimile call or a data call during the first period of time, and means active after the second period of time for initiating a facsimile call handshaking procedure in the event that the data modem handshaking procedure is not successful.
Claim 3
Dependent Claim
34 words
The system of claim 1 include means for providing a signal which indicates the type of call received, and means responsive to the message/signal for implementing communications software for the type of call received.
Claim 4
Dependent Claim
19 words
The system of claim 1 Wherein the first time period has a duration on the order of 5-6 seconds.
Claim 5
Dependent Claim
19 words
The system of claim 1 wherein the second time period has a duration on the order of 8 seconds.
Claim 6
Dependent Claim
36 words
The system of claim 1 including a tone receiver, and means responsive to the tone receiver during the first time period for initiating the data modem handshaking procedure in response to a tone of predetermined frequency.
Claim 7
Dependent Claim
36 words
The system of claim 1 including a tone receiver, and means responsive to the tone receiver during the first time period for initiating the facsimile call handshaking procedure in response to a tone of predetermined frequency.
Claim 8
Dependent Claim
63 words
The system of claim 1 including a DTMF tone receiver, and means responsive to the tone receiver for initiating a facsimile handshaking procedure upon receipt of a tone corresponding to a first predetermined digit, initiating a data modem handshaking procedure upon receipt of a tone corresponding to a second predetermined digit, and initiating another procedure upon receipt of tone corresponding to another digit.
Claim 9
Dependent Claim
122 words
In a method of receiving calls from a facsimile machine and from a data modem, the steps of: monitoring a call for a first period of time following receipt of the call to identify the type of call, initiating a handshaking procedure corresponding to the type of call received if either a facsimile call or a data call is identified during the first period of time, initiating a data modem handshaking procedure for a second period of time in the event that the call is not identified as either a facsimile call or a data call during the first period of time, and thereafter initiating a facsimile call handshaking procedure in the event that the data modem handshaking procedure is not successful.
Claim 10
Dependent Claim
122 words
In a method of receiving calls from a facsimile machine and from a data modem, the steps of: monitoring a call for a first period of time following receipt of the call to identify the type of call, initiating a handshaking procedure corresponding to the type of call received if either a facsimile call or a data call is identified during the first period of time, initiating a data modem handshaking procedure for a second period of time in the event that the call is not identified as either a facsimile call or a data call during the first period of time, and thereafter initiating a facsimile call handshaking procedure in the event that the data modem handshaking procedure is not successful.
Claim 11
Dependent Claim
34 words
The method of claim 8 including the steps of providing a signal which indicates the type of call received, and implementing communications software for the type of call received in accordance with the message/signal.
Claim 12
Dependent Claim
19 words
The method of claim 8 wherein the first time period has a duration on the order of 5-6 seconds.
Claim 13
Dependent Claim
19 words
The method of claim 8 wherein the second time period has a duration on the order of 8 seconds.
Claim 14
Dependent Claim
40 words
The method of claim 8 including the steps of monitoring the call for a tone signal during the first period of time, and initiating the data modem handshaking procedure in the event that a tone of predetermined frequency is detected.
Claim 15
Dependent Claim
39 words
The method of claim 8 including the steps of monitoring the call for a tone signal during the first period of time, and initiating the facsimile call handshaking procedure in the event that tone of predetermined frequency is detected.
Claim 16
Dependent Claim
64 words
The method of claim 8 including the steps of monitoring the call for a DTMF tone signal during the first period of time, and initiating either the facsimile handshaking procedure or the data modem handshaking procedure in the event that a DTMF digit of predetermined value is detected, or initiating another procedure in the event that a DTMF digit of another value is detected.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |