Communication switch
US5953330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Mar 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5652
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An enhanced Time Slot Interchange (TSI) facility, in addition to serving synchronous channels of communication, decomposes and composes asynchronous data cells to provide real-time communication among and between both synchronous and asynchronous channels served by a network access switch. An asynchronous cell comprises a 5 byte header and a 48 byte payload. The payload comprises voice samples from a temporarily defined set of DSO facilities and/or data from a variety of data facilities. Time slots of the TSI are temporarily assigned to the payload bytes of each incoming asynchronous cell; the payload bytes are stored in memory locations corresponding to those time slots; and the stored data is read out during time slots assigned to the destination channels of communication. The TSI comprises three data rams to accommodate for frame to frame jitter in the time of arrival of payload samples. Asynchronous cells are composed by transferring stored voice samples and data bytes to an asynchronous link during the times slots which are currently assigned to bytes of the composed cell payload. The header for outgoing asynchronous cells is inserted by a message handler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.