| 摘要 |
<p>PURPOSE:To eliminate the need for a cell separation/insertion circuit and a cell multiplex/demultiplex circuit by arranging an ADP processing section to the rear side of an ATM switch and utilizing the ATM switch so as to collect/ distribute cells for a signal channel. CONSTITUTION:A subscriber line signal device 1 comprising an ADP processing section 100 applying adaptation processing and an LAPD.LSI 101 applying layer 2 protocol processing of a signal channel is connected to a relay line side of the ATM switch 30. The device 1 is connected to a processor 40 applying layer 3 protocol processing of the signal channel, header conversion table revision, initial value setting of a switch 30 and control of the LAPD.LSI 101 or the like. A memory 41 is used for a storage area and a work area for a program executed by a processor 40. A subscriber line interface section 10 and a relay line interface section 20 apply addition/delete of an optical/electric signal and a route information part to each cell or the like respectively.</p> |
