System for virtual connection to dedicated PSTN lines
US5913176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Apr 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for connecting a telephone subscriber to the public switched telephone network ("PSTN"), where a physical connection is not available while utilizing conventional telephony subscriber terminals. The connection is provided using a wireless telecommunications system adapted with a gateway collection of lines and a switch between the wireless system and the PSTN. When a call is to be made, the wireless system sends a predetermined access number to identify the caller as a gateway caller. Thereafter, a connection is made between the wireless subscriber and a dedicated PSTN line. The method includes providing a gateway access code to the public switch to obtain a trunk line and thereafter, utilizing the normal call progression cues provided by the PSTN, such as a busy signal and dial tone. The destination telephone number dialed as DTMF is then sent over a designated voice channel by the transceiver, and the connection is made by the PSTN. An interface is provided which includes a microprocessor programmed to follow a call origination and a call reception sequence as well as circuitry providing for communication between the mobile station transceiver …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.