| 摘要 |
<p num="1"><br/><br/> A circulating switch comprises switch modules of moderate capacities <br/>interconnected by a passive rotator. Data is sent from a one switch module to <br/>another switch module either directly, traversing the rotator once, or <br/>indirectly <br/>through at least one intermediate switch module where the rotator is traversed <br/><br/>twice. A higher capacity extended circulating switch is, constructed from <br/>higher--capacity switch modules, implemented as common memory switches and <br/>having <br/>multiple ports, interconnected through a multiplicity of rotators preferably <br/>arranged <br/>in complementary groups of rotators of opposite rotation directions. A <br/>polyphase <br/>circulating switch having a low switching delay is derived from a multi-<br/>rotator <br/>circulating switch by providing programmable rotators having adjustable <br/>relative <br/>rotator-cycle phases. A low delay high-capacity switch may also be, <br/>constructed <br/>from prior-art medium-capacity rotator space switches with mutually phase-<br/>shifted <br/>rotation cycles.<br/> |
