Transmission of voice over an asynchronous network
US6118763A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M7/0018
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An SCSA RX/TX memory (220) receives voice data and stores voice data samples under established voice channel identifiers. A controller (240) selects voice channels, and their associated voice data, for inclusion in an ATM cell. The memory (220) sends the voice channel identifier and the voice data for the selected channels to a Constant Bit Rate Segmentation And Reassembly (CBR SAR) circuit (225). The CBR SAR aggregates the voice data into an appropriate number of ATM cell slots for each of those voice channels. The CBR SAR 225 sends the aggregated information to a Multiplexer/Duplicator Circuit (MUX/DUP) (230) which assembles the ATM cell, and sends the completed ATM cell to an ATM transceiver (265) for transmission. When there is no voice data to be sent information data from an Available Bit Rate (ABR) SAR (260) is assembled to form an ATM cell to be sent by the ATM transceiver. The MUX/DUP also receives an ATM cell from the ATM transceiver, duplicates the ATM cell, sends one copy of the ATM cell to the CBR SAR, and one copy of the ATM cell to the ABR SAR. The SARs disassemble the ATM cell, verify the channel identifiers, and route any valid channel identifiers and associated da…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.