US5307402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduced time remote access method
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1992-04-16
•
Granted: 1994-04-26
•
Expires: 2012-04-16
Abstract
Abstract Several techniques for reducing the amount of time between initiation of a terminal request through a dial-up telephone line and the actual initiation of transactions between the terminal and a host computer. By using a ring down or hotline circuit configuration dialing and call setup time can be saved. By using cut through techniques to gain direct access to the IXC switch, time can also be saved over conventional techniques. With the ring down use or cut through procedures no login procedure is necessary to ensure secure access to the host computer. The ring generation period is shortened to just an interval sufficient to allow the host modem to recognize the ring, with the ring indication period also begin shortened. The modems can be set to fixed baud rates, but in a more preferred embodiment the terminal modem transmits the originate carrier prior to the host modem picking up the line. The host modem then senses the originate carrier quickly and provides the proper answer carrier. If an originate carrier of an improper baud rate is provided, speed negotiation commences immediately. If no originate carrier is provided within a given time, a fall back to conventional techniques is used. The silent interval prior to operation of the host modem is removed. After the carriers are both provided, normal connection to the host computer is made and the transaction completed.
Inventors
- 👤 Christophe K. Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:59
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
202 words
A method of transmitting confidential data between a particular remote modem of a plurality of remote modems and a host computer having a host modem capable of being connected to any of the plurality of remote modems, comprising the steps of: the particular remote modem seizing a telephone line; determining the seizure of the telephone lien by the particular remote modem and initiating a secure telephone connection sequence to the host modem, said sequence being completed only if the remote modem has been previously authorized to be connected to the host modem, said sequence being concluded by providing a ring signal to the host modem; the host modem seizing the telephone line and providing an answer tone upon receipt of the ring signal; the particular remote and host modems completing a baud rate determination after the answer tone is provided; providing indication from the host modem to the host computer that communication has been established and establishing a link between the host modem and the host computer; transmitting a transaction commence signal to the particular remote modem, said transaction commence signal being transmitted without a login procedure being performed; and transmitting confidential data between the particular remote modem and the host modem.
Claim 2
Independent Claim
202 words
A method of transmitting confidential data between a particular remote modem of a plurality of remote modems and a host computer having a host modem capable of being connected to any of the plurality of remote modems, comprising the steps of: the particular remote modem seizing a telephone line; determining the seizure of the telephone lien by the particular remote modem and initiating a secure telephone connection sequence to the host modem, said sequence being completed only if the remote modem has been previously authorized to be connected to the host modem, said sequence being concluded by providing a ring signal to the host modem; the host modem seizing the telephone line and providing an answer tone upon receipt of the ring signal; the particular remote and host modems completing a baud rate determination after the answer tone is provided; providing indication from the host modem to the host computer that communication has been established and establishing a link between the host modem and the host computer; transmitting a transaction commence signal to the particular remote modem, said transaction commence signal being transmitted without a login procedure being performed; and transmitting confidential data between the particular remote modem and the host modem.
Claim 3
Dependent Claim
26 words
A method of claim 1, wherein the particular remote and host modems are selected to operate at fixed, common baud rates without baud rate determination handshaking.
Claim 4
Independent Claim
164 words
A method of connecting a remote modem to a host computer having a host modem, comprising the steps of: the remote modem seizing a telephone line; determining the seizure of the telephone line by the remote modem and initiating a telephone connection sequence to the host modem, said sequence being completed by providing a ring signal to the host modem; the remote modem providing an originate carrier prior to the completion of providing the ring signal to initiate a modem handshake; the host modem sensing the ring signal and seizing the telephone line in response thereto and monitoring for the originate carrier; the host modem providing an answer carrier after determining the presence of the originate carrier to complete the modem handshake; providing indication from the host modem to the host computer that communication has been established and establishing a link between the host modem and the host computer; and transmitting a transaction commence signal to the remote modem after the link is established.
Claim 5
Independent Claim
164 words
A method of connecting a remote modem to a host computer having a host modem, comprising the steps of: the remote modem seizing a telephone line; determining the seizure of the telephone line by the remote modem and initiating a telephone connection sequence to the host modem, said sequence being completed by providing a ring signal to the host modem; the remote modem providing an originate carrier prior to the completion of providing the ring signal to initiate a modem handshake; the host modem sensing the ring signal and seizing the telephone line in response thereto and monitoring for the originate carrier; the host modem providing an answer carrier after determining the presence of the originate carrier to complete the modem handshake; providing indication from the host modem to the host computer that communication has been established and establishing a link between the host modem and the host computer; and transmitting a transaction commence signal to the remote modem after the link is established.
Claim 6
Dependent Claim
22 words
The method of claim 3, wherein the host modem provides the answer carrier without a silent interval after seizing the telephone line.
Claim 7
Dependent Claim
18 words
The method of claim 3, wherein the transaction commence signal is transmitted without a login procedure being performed.
Claim 8
Dependent Claim
47 words
The method of claim 3, wherein if the host modem fails to determine the presence of the originate carrier within a predetermined time, the host modem provides an answer tone and the remote and host modems complete a carrier handshake, prior to providing the communication established indication.
Claim 9
Dependent Claim
27 words
The method of claim 3, wherein the ring signal is provided to the host modem only for a period sufficient to allow detection by the host modem.
References Cited (Backward Citations)
US3783194A
Cited
US4606044A
Cited
US4669090A
Cited
US4939767A
Cited
US4894847A
Cited
US4796292A
Cited
EP0380160A1
Cited
US5025469A
Cited
US5144651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-25 | 1997-10-25 | 1998-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-25 | 2001-10-25 | 2002-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-25 | 2005-10-25 | 2006-04-26 | $7700.00 | Window Closed / Lapsed |