公开(公告)号：CA2147120C

公开(公告)日：1999-04-20

申请号：CA2147120

申请日：1993-11-08

Applicant: COMPAQ COMPUTER CORP

Inventor： DYKES DON A ,  CLARK ANDREW C ,  NAGEL PAUL E ,  TRAN HUYEN B ,  JONES RANDALL L ,  BALDRIDGE RONALD L ,  CASTELL ROBIN T

IPC: H04B7/26 ,  H04M11/00 ,  H04M11/06 ,  H04W88/02 ,  H04Q7/32

Abstract: A modem which includes connections for both land lines and a cellular phone. The modem contains high and low level routines that allow it to perform standard AT commands rationally when connected to a cellular phone, and further perform additional AT commands that access cellular specific features. An applications software program in a computer connected to the modem can provide a number of options for determining whether to use the land line or the cellular phone when both are connected. First, it can default to the land line and only use the cellular phone if the land line is not available. Alternatively, it can first use the cellular phone and only use the land line if the cellular phone signal strength is not sufficient. Further, cellular file transfer operations can be aborted if the remaining battery life in the cellular phone is insufficient to reliably complete the transfer.

公开(公告)号：AT189094T

公开(公告)日：2000-02-15

申请号：AT94902240

申请日：1993-11-08

Applicant: COMPAQ COMPUTER CORP

Inventor： DYKES DON A ,  CASTELL ROBIN T ,  CLARK ANDREW C ,  NAGEL PAUL E ,  TRAN HUYEN B ,  JONES RANDALL L ,  BALDRIDGE RONALD L

IPC: H04B7/26 ,  H04M11/00 ,  H04M11/06 ,  H04W88/02 ,  H04Q7/32

Abstract: A modem which includes connections for both land lines and a cellular phone. The modem contains high and low level routines that allow it to perform standard AT commands rationally when connected to a cellular phone, and further perform additional AT commands that access cellular specific features. An applications software program in a computer connected to the modem can provide a number of options for determining whether to use the land line or the cellular phone when both are connected. First, it can default to the land line and only use the cellular phone if the land line is not available. Alternatively, it can first use the cellular phone and only use the land line if the cellular phone signal strength is not sufficient. Further, cellular file transfer operations can be aborted if the remaining battery life in the cellular phone is insufficient to reliably complete the transfer.

公开(公告)号：AU5667994A

公开(公告)日：1994-06-08

申请号：AU5667994

申请日：1993-11-08

Applicant: COMPAQ COMPUTER CORP

Inventor： DYKES DON A ,  CASTELL ROBIN T ,  CLARK ANDREW C ,  NAGEL PAUL E ,  TRAN HUYEN B ,  JONES RANDALL L ,  BALDRIDGE RONALD L

IPC: H04B7/26 ,  H04M11/00 ,  H04M11/06 ,  H04W88/02 ,  H04Q7/04

Abstract: A modem which includes connections for both land lines and a cellular phone. The modem contains high and low level routines that allow it to perform standard AT commands rationally when connected to a cellular phone, and further perform additional AT commands that access cellular specific features. An applications software program in a computer connected to the modem can provide a number of options for determining whether to use the land line or the cellular phone when both are connected. First, it can default to the land line and only use the cellular phone if the land line is not available. Alternatively, it can first use the cellular phone and only use the land line if the cellular phone signal strength is not sufficient. Further, cellular file transfer operations can be aborted if the remaining battery life in the cellular phone is insufficient to reliably complete the transfer.

公开(公告)号：DE69721352D1

公开(公告)日：2003-06-05

申请号：DE69721352

申请日：1997-01-29

Applicant: COMPAQ COMPUTER CORP

Inventor： SANDS BYRON G ,  BROWN PETER J ,  DYKES DON A ,  LOVE ANDREW L ,  EYRES KEVIN W

IPC: G06F13/10 ,  G06F13/38

Abstract: A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer system itself. The code usually implemented in the microcontroller is instead implemented as a virtual modem controller to be called by the operating system of the computer itself. Further, this virtual modem controller includes a virtualized UART, that appears to the operating system software as a hardware UART, with entry points for calls to replace input/output instructions. In this way, standard device driver code written to execute input/output operations is easily converted to operate with the "virtualized" UART.

公开(公告)号：DE69721352T2

公开(公告)日：2003-12-24

申请号：DE69721352

申请日：1997-01-29

Applicant: COMPAQ COMPUTER CORP

Inventor： SANDS BYRON G ,  BROWN PETER J ,  DYKES DON A ,  LOVE ANDREW L ,  EYRES KEVIN W

IPC: G06F13/10 ,  G06F13/38

Abstract: A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer system itself. The code usually implemented in the microcontroller is instead implemented as a virtual modem controller to be called by the operating system of the computer itself. Further, this virtual modem controller includes a virtualized UART, that appears to the operating system software as a hardware UART, with entry points for calls to replace input/output instructions. In this way, standard device driver code written to execute input/output operations is easily converted to operate with the "virtualized" UART.

公开(公告)号：CA2147120A1

公开(公告)日：1994-05-26

申请号：CA2147120

申请日：1993-11-08

Applicant: COMPAQ COMPUTER CORP

Inventor： DYKES DON A ,  CASTELL ROBIN T ,  CLARK ANDREW C ,  NAGEL PAUL E ,  TRAN HUYEN B ,  JONES RANDALL L ,  BALDRIDGE RONALD L

IPC: H04B7/26 ,  H04M11/00 ,  H04M11/06 ,  H04W88/02

Abstract: A modem which includes connections for both land lines and a cellular phone. The modem contains high and low level routines that allow it to perform standard AT commands rationally when connected to a cellular phone, and further perform additional AT commands that access cellular specific features. An applications software program in a computer connected to the modem can provide a number of options for determining whether to use the land line or the cellular phone when both are connected. First, it can default to the land line and only use the cellular phone if the land line is not available. Alternatively, it can first use the cellular phone and only use the land line if the cellular phone signal strength is not sufficient. Further, cellular file transfer operations can be aborted if the remaining battery life in the cellular phone is insufficient to reliably complete the transfer.

公开(公告)号：JPH1083365A

公开(公告)日：1998-03-31

申请号：JP1917897

申请日：1997-01-31

Applicant: COMPAQ COMPUTER CORP

Inventor： SANDS BYRON G ,  BROWN PETER J ,  DYKES DON A ,  LOVE ANDREW L ,  EYRES KEVIN W

IPC: G06F13/10 ,  H04L29/02 ,  H04M11/00

Abstract: PROBLEM TO BE SOLVED: To reduce size and cost and to efficiently update functions by realizing the hardware part of a modem by a software module. SOLUTION: A modem card 30 is connected to a computer through a slot connector 28 but not provided with a microcontroller, UART(universal asynchronizing receiver-transmitter) 46, etc., before being necessitated. The functions of these are realized by a virtual modem controller called by the operating system of the computer itself. The virtual modem controller includes virtual UART, which looks a hardware from an operating software, and is provided with an entry point for a call to replace with an input/output instruction. Therefore, a standard device driver code written for executing input/output operation is converted to operate virtual UART.