Tag: ISDN

ISDN Basic Access Reference Model

ISDN Basic Access – A Brief Overview

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ISDN Basic Access – A Brief Overview This document is a brief overview of ISDN Basic Access and written from viewpoint of Network Termination (NT1). The Integrated Services Digital Network (ISDN) is a set of digital transmission standards which are used for end-to-end digital connectivity. ‘‘Integrated Services’’ referring to its ability to sustain numerous applications. ‘‘Digital Network’’ […]

ISUP message format

ISUP: ISDN User Part

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ISUP: ISDN User Part   Protocol Description The ISUP – ISDN User Part, a key protocol in the SS7 / C7 signaling system, defines the protocol and procedures used to set-up, manage, and release trunk circuits that carry voice and data calls over the public switched telephone network (PSTN) between different switches. ISUP is used for […]