Internetworking Terms: Cisco ISDN User Part (C-ISUP)

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Cisco ISDN User Part (C-ISUP)


Cisco proprietary protocol based on ISDN User Part (ISUP). ISUP is a protocol in the Signaling System 7 (SS7) system.


ISUP defines the protocol and procedures used to set up, manage, and release trunk circuits that carry voice and data over the public switched telephone network (PSTN). ISUP is used for both ISDN and non-ISDN calls.

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