In order to support both signalling processing on a per channel basis and multiple adaptation protocols, an interface (10) is modularised principally by function. Incident channels (60-62, Ch.sub.o --Ch.sub.n) are applied to a routing device (16) that consults a connection map (64) to determine an appropriate...http://www.google.de/patents/US6266342?utm_source=gb-gplus-sharePatent US6266342 - Adaption resource module and operating method therefor