| 摘要 |
The invention concerns an OXC core in telecommunications, of the kind employing electronic and/or optical switch elements as building blocks and a three state interconnection architecture according to Clos theorem (Clos configuration), to achieve the strictly non-blocking condition. According to the invention, the hardware architecture of the OXC core is carried out with scalable, modular board elements of two kinds, the one active and the other one passive, as well as with a backplane interconnecting said board elements, the number of said board elements determining the size of the OXC core. In this OXC core the elementary switching matrices belonging to each stage of the Clos configuration are all contained in the active ones of said elements. The passive elements are exclusively electric or exclusively optical and in this second case they are comprised of optical fibers or optical waveguides. Moreover, the backplane, is provided for the maximum size of the OXC core and at least one active element and three passive elements are associated, in the smallest size of the OXC core, with the backplane, passive elements being able to be replaced at any time with further active ones. |
