| 摘要 |
<p>The multiplexer has a first receiver (400) which receives the payload of an SDH frame while a second receiver (700) receives the payload of a PDH frame. A concentrator reduces the number of ATM cells by eliminating empty ATM cells to reduce the excessive bit rate required to maintain the PDH frame. A generator (600) concatenates low payload SDH cells while retaining which appropriate parts of the PDH payload. A multiplexer (100) multiplexes all the SDH cells and produces large capacity payloads on the output link (200).</p> |
