Line interface unit for caller-controlled receipt and delivery of voice messages
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United States of America Patent
Stats
-
Apr 25, 1989
Grant Date -
N/A
app pub date -
Jun 22, 1988
filing date -
Jun 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A line interface unit for controlling receipt and delivery of voice messages over a telephone system having a voice message facility connectable to at least one calling station and a called station via a central office. The interface unit comprises a first switch connected to the calling station in the tip and ring lines and a second switch connected to the central office in the tip and ring lines, the switches having first and second positions and wherein said signals on the tip and ring lines are connected directly between the calling station and the central office when each of the switches is in the first position. In operation, a control circuit of the line interface unit responds to detection of a busy/no answer condition at the called station for switching the first switch from its first to second position to connect a speech circuit to the calling station for issuing a prompt. After the prompt is issued, the control circuit responds to receipt of a DTMF signal or additional coinage from the calling station for switching the second switch from first to second position to connect a speed-dial circuit to the central office for dialing the voice message facility. The control unit then responds to receipt of a DTMF signal from the voice message facility for switching the first and second switches from their second positions back to their first positions to connect the calling station to the voice message facility.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- MESSAGER PARTNERS;MESSAGEPHONE, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Carter, Howard E | Denton, TX | 7 | 230 |
Pierce, Byron C | Garland, TX | 7 | 230 |
Pugh, Joel A | Dallas, TX | 17 | 1807 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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