ATM switching system and method with propagation delay compensation
US6301269A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1998 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | May 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5681
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A switch system (20) switches at least sixty-four asynchronous transfer mode (ATM) input data streams (22) into at least sixty-four ATM output data streams (24). The switch system (20) includes a backplane assembly (38) having integral data transmission lines, integral clock transmission lines, and discrete slots (36). A single stage space switch circuit card (26), a clock circuit card (28), and input circuit cards (30) are connected to separate slots (36) in the backplane assembly (38). The integral data transmission lines are coupled between the input circuit cards (30) and the switch circuit card (26) and the integral clock transmission lines are coupled between the clock circuit card (28) and the input circuit cards (30). Data path lengths for the integral data transmission lines differ in the backplane assembly (38), and clock path lengths for the clock transmission lines differ in the backplane assembly. A timing compensation element (86) on each of the input circuit cards (30) imparts a time delay to one of the ATM input data streams (22) to compensate for data and clock path length differences so the each of the ATM input data streams (22) arrive at the single stage switch …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.