| 摘要 |
A communications system including a node (10) connected a via an ATM connection (11) to a cell Synchronisation and Recovery Unit (12). This allows a number of lower bit rate paths (14, 16) (e.g. n x 64 kbit/s) to be utilised via a switching centre (15). Another synchronisation and recovery unit (17) is connected through an ATM link (18) to a selected recipient interface (24-29). A method is provided in which distinct first header portions in idle cells are use d to determine the cyclic order in which the ATM cell portions are transmitted down paths (14,16) and to determine the delay expe rienced through the paths in order to reconstruct the cells from the portions received from the respective paths (14,16). The unit s (12 and 17) determine the delay experienced through the paths and reconstruct cells from the portions passed through respect ive paths (14). A personal number can be assigned a customer to allow access from one of a number of points and to select a desired service via control point (13).
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