Switching network for a PCM TDM system
US4123624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1977 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | May 10, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A two-stage switching network is provided wherein the two stages are interconnected by a pseudo space switch. The input and output ports of the network, each comprising a plurality of channels, are partitioned into groups each one of which is common to a time division switch. Each switch comprises a serial-to-parallel or a parallel-to-serial converter circuit, a data memory and a connection memory. The space switch comprises a commutator circuit for sequentially and periodically connecting each of the input switches to each of the output switches once for each channel. The commutator comprises a plurality of layers corresponding in number to the number of bits in each PCM word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.