Digital switching systems employing multi-channel frame association apparatus
US4608684A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1984 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Mar 26, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2214/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is disclosed an apparatus for enabling one to increase the bandwidth of a multi-channel digital switching system. Essentially, the system allows one to set up multi-channel link paths to obtain a total band width of N times the bandwidth of a typical switching path in a digital switching network. To do this, a common frame counter is located in the unused bit positions of the sample in each of the paths, forming a wideband channel. At the receive end, the apparatus de-skews the received samples to properly reassembly the output. This operation is provided by utilizing one content addressable memory and an associated random access memory (CAM/RAM) (C/R) for each channel to be joined. The width of each C/R is twelve bits, eight for data, the read-out section and four for frame counter, which is the associative section. The length of each C/R is a function of the maximum skew to be counted. A four bit output frame counter provides the associative addresses for the C/R which, when given an associative address corresponding to a frame number, will respond with an eight bit data word for that frame or with an Empty signal, meaning that no word exists for that frame number. At initi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.