| 摘要 |
1. An arrangement for the clock pulse supply in a digital communications switching system with central and peripheral function units which are spatially separated from one another and between which an information exchange takes place in both directions in accordance with the time multiplex method, wherein the peripheral function units are individually supplied with a clock pulse signal and a frame mark signal by means of connections which are led to a distribution frame, and wherein is arranged a central clock pulse generator which is connected to each central function unit for the direct supply thereof with the clock pulse signal and the frame mark signal, characterised in that the central clock pulse generator (CCG) is connected to each central function unit (CSN1... CSNk) by means of cables (K1... Kk) of the same length, which cables (K1.. Kk) comprise a pair of lines for the direct supply of the central function units (CSN) with the clock pulse signal (CKA) and the frame mark signal (FMB), and n/k additional line pairs which are led to the distribution frame (AV1... AVk) and serve for the individual supply of n/k peripheral function units (LGT1... LGTn) with the clock pulse signal (CKA) and the frame mark signal (FMB), that the peripheral function units (LTG1... LTGn) are connected to assigned cables (L1... Ln), which, in addition to the four-wire multiplex lines (HWY1... k) which are arranged for the data and speech information exchange between the central and the peripheral function units (CSN and LTG), comprise the lines, which extend from the distribution frame (AV1... AVk) and serve for the supply of the peripheral function units (LTG) with the clock pulse signal (CKA) and the frame mark signal (FMB), and for each multiplex line (HWY) comprise a line (FMBel... k) which serves for the re-transmission of the frame mark signal (FMB) from the peripheral to the central function units, and that in the central function units (CSN), for each connected multiplex line (HWY), there is arranged a control circuit (CC) which maintains the time frame synchronism between the outgoing and incoming direction of transmission in relation to the central function unit (CSN). |
