USRE38127E1 - Portable hybrid communication system and methods - Google Patents
Portable hybrid communication system and methods Download PDFInfo
- Publication number
- USRE38127E1 USRE38127E1 US07/831,671 US83167192A USRE38127E US RE38127 E1 USRE38127 E1 US RE38127E1 US 83167192 A US83167192 A US 83167192A US RE38127 E USRE38127 E US RE38127E
- Authority
- US
- United States
- Prior art keywords
- cellular
- signals
- tru
- computer
- interface means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
- G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
IMPEDANCE | |||
ITEM | DIRECTION | LEVEL (DBV) | (KILO OHMS) |
DTMF | OUTPUT | −6 | 1-10 |
MODEM | OUTPUT | −9 | >10 |
MODEM | INPUT | −10 TO −40 | >10 |
DAA | OUTPUT | −10 TO −40 | 1-10 |
DAA | INPUT | −9 MAXIMUM | <1 |
TRU | OUTPUT | −20 | 1-10 |
TRU | INPUT | −20 | >10 |
CU | OUTPUT | −20 | 1-10 |
CU | INPUT | −20 | >10 |
SPEAKER- | OUTPUT | −40 | >1 |
PHONE | |||
SPEAKER- | |
0 | <10 |
PHONE | |||
MICRO- | OUTPUT | −40 | >100 |
PHONE | |||
SPEAKER | INPUT | −0 | <0.01 |
Claims (55)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/831,671 USRE38127E1 (en) | 1989-01-19 | 1992-02-05 | Portable hybrid communication system and methods |
US10/141,880 USRE38645E1 (en) | 1989-01-19 | 2002-05-10 | Portable hybrid communication system and methods |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/301,521 US4972457A (en) | 1989-01-19 | 1989-01-19 | Portable hybrid communication system and methods |
US07/831,671 USRE38127E1 (en) | 1989-01-19 | 1992-02-05 | Portable hybrid communication system and methods |
US10/141,880 USRE38645E1 (en) | 1989-01-19 | 2002-05-10 | Portable hybrid communication system and methods |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/301,521 Reissue US4972457A (en) | 1989-01-19 | 1989-01-19 | Portable hybrid communication system and methods |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/301,521 Division US4972457A (en) | 1989-01-19 | 1989-01-19 | Portable hybrid communication system and methods |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE38127E1 true USRE38127E1 (en) | 2003-05-27 |
Family
ID=23163744
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/301,521 Ceased US4972457A (en) | 1989-01-19 | 1989-01-19 | Portable hybrid communication system and methods |
US07/831,671 Expired - Lifetime USRE38127E1 (en) | 1989-01-19 | 1992-02-05 | Portable hybrid communication system and methods |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/301,521 Ceased US4972457A (en) | 1989-01-19 | 1989-01-19 | Portable hybrid communication system and methods |
Country Status (1)
Country | Link |
---|---|
US (2) | US4972457A (en) |
Cited By (20)
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US20030122882A1 (en) * | 2001-12-28 | 2003-07-03 | Samuel Kho | Menu navigation and operation feature for a handheld computer |
US20050179654A1 (en) * | 2001-06-11 | 2005-08-18 | Hawkins Jeffrey C. | Interface for processing of an alternate symbol in a computer device |
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US20090034514A1 (en) * | 1999-08-12 | 2009-02-05 | Palm, Inc. | Integrated Mobile Computing and Telephony Device and Services |
US20100015965A1 (en) * | 1999-08-12 | 2010-01-21 | Palm, Inc. | Integrated handheld computing and telephony device |
US7725127B2 (en) | 2001-06-11 | 2010-05-25 | Palm, Inc. | Hand-held device |
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US8677286B2 (en) | 2003-05-01 | 2014-03-18 | Hewlett-Packard Development Company, L.P. | Dynamic sizing user interface method and system for data display |
US8774375B2 (en) * | 2007-04-27 | 2014-07-08 | Padmanabhan Mahalingam | System and methods for establishing a telephony session from a remote dialing unit |
US20140370881A1 (en) * | 2000-12-19 | 2014-12-18 | At&T Intellectual Property I, L.P. | System and Method for Remote Control of Appliances Utilizing Mobile Location-Based Applications |
US9466076B2 (en) | 2000-12-19 | 2016-10-11 | At&T Intellectual Property I, L.P. | Location blocking service from a web advertiser |
US9501780B2 (en) | 2000-12-19 | 2016-11-22 | At&T Intellectual Property I, L.P. | Surveying wireless device users by location |
US9571958B2 (en) | 2000-06-30 | 2017-02-14 | At&T Intellectual Propery I, L.P. | Anonymous location service for wireless networks |
US9763091B2 (en) | 2000-12-19 | 2017-09-12 | At&T Intellectual Property I, L.P. | Location blocking service from a wireless service provider |
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