| 摘要 |
<p>A DWDM-based network interface module connects directly to the internal bus (or switch) core of a communications system via a standard integrated bus-bridge to provide low latency transmission (via multiple 'virtual' DWDM channels) and interconnect speeds in excess of 10 Gbps over a range of about two hundred kilometers. Depending on directional transmission capability (transmitter, receiver or transceiver), the network interface may include a data buffer unit, a clock generator, a time division multiplexing unit, a channel ID generator or a channel ID verifier, a data encoder/scrambler or a data decoder/unscrambler, a data sequencer/reshaper, a DWDM transmitter and a DWDM multiplexer, or a DWDM receiver and a DWDM demultiplexer, or both, and a directional optical coupler. The direct bus/switch connection bypasses any MAC (Media Access Control) layer buffering and allows two switch chipsets to connect as a single device across a core bus (such as PCI). Multiple chips distribute switching loads and directly communicate with their counterparts at the speed of the bus, which far exceeds the conventional interconnect speed via I/O ports, eliminating all buffering and interface costs normally associated with high speed aggregation. The network interface module transports physical bus or switch signals via a plurality of DWDM channels creating in effect a virtual device that extends from a few meters to over hundreds of kilometers.</p> |
