| 摘要 |
1. A concentrator-deconcentrator device, intended to be associated to a timeswitch telephone exchange central and to establish space-time throughways between PCM junctions, called subscriber junctions, which are connected to a group of subscriber and circuit equipments, and "exchanger central" PCM junctions which are connected to the exchange central, said device comprising as space-time switch elements symmetric time switch matrices (MTS), and being of the two stage type, characterized in that the device comprises a centralized part (102) which is composed of central modules (103 ... 108), common to the concentrator (2) and to the deconcentrator (3), and decentralized parts (101) belonging respectively one to the concentrator of the device and the other to the deconcentrator, these decentralized parts being included in terminal modules (4 ... 9) containing the subscriber and circuit equipments, that the common central modules (103 ... 108) each comprise symmetric time switch matrices (207, 215) which are branched between the PCM exchange central junctions (Se, Es) and the subscriber PCM junctions, and that the terminal modules each comprise symmetric time swtich matrices (206, 217) which are branched between the subscriber PCM junctions and the subscriber and circuit equipments (202). |
