Common channel signalling for international services

Abstract

A B S "This paper dcrcribes work done by AT&K KDD and BTI to define an international common channel signalling specijication based on CCl'IT No. 7 for use in supporting international serv- ices.Thir work began in I986 with the goal of reaching agreement on a signaIlingprrrtocol specification that would be the bas& for supporting new and hpmved international services.As a result of this work, a specification forIntegrated.5ervice.s Digital Network User Pprt (ISUP) has been written to initially provide a fronrovork for operations among the k e companies, rmd, late5 pot&& wrldwide.