| 摘要 |
Disclosed is a transmission apparatus for accommodating a plurality of asynchronous networks and a plurality of synchronous networks. The apparatus includes a plurality of asynchronous network interface units each having an asynchronous network termination unit for inputting and outputting a packet from and to one of the asynchronous networks and a mapping unit for carrying out a process to convert the packet into a first synchronous frame and vice versa, a plurality of synchronous network interface units each used for inputting and outputting a second synchronous frame from and to one of the synchronous networks, a buffer provided on at least a first asynchronous network interface unit selected among the asynchronous network interface units, and a control unit for storing a packet output by the asynchronous network termination unit for accommodating a specific one of the asynchronous networks and a packet output by the asynchronous network termination unit of the first asynchronous network interface unit into the buffer by adding identifiers for identifying the asynchronous network termination units in the event of a line failure occurring in one of the synchronous networks on a route related to the specific asynchronous network.
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