| 摘要 |
<p>A digital cross-connection apparatus for connecting first and second communication networks (STM-N) which have respectively a plurality of first and second data channels, and have multiplexed information data and communication monitoring data of the channels. The apparatus is provided with add/drop units (TTF, TSAF, LCS) and a digital switch matrix (LPX). The add/drop unit (TTF, TSAF, LCS) is connected to the first network (STM-N), and can extract selectively the data from the first data channel. The output terminals of the digital switch matrix are connected to the second network (STM-N). The input terminals of the digital switch matrix are connected to the add/drop unit (TTF, TSAF, LCS) so as to receive the extracted data including the management data sent from the first network. Therefore, the management data can reach the second network via the digital switch matrix (LPX), and thereby, the monitoring of end-to-end paths between the networks are promoted. The apparatus is used advantageously in connecting two optical ring networks with each other. For example, when the apparatus is used to connect synchronous digital hierarchy networks, maintained are the continuities of the paths extending from the nodes of the first network to the nodes of the second network. <IMAGE></p> |
