{"draft":"draft-ietf-sipping-overlap-04","doc_id":"RFC3578","title":" Mapping of Integrated Services Digital Network (ISDN) User Part (ISUP) Overlap Signalling to the Session Initiation Protocol (SIP) ","authors":["G. Camarillo","A. B. Roach","J. Peterson","L. Ong"],"format":["ASCII","HTML"],"page_count":"13","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Proposal Investigation","abstract":" This document describes a way to map Integrated Services Digital Network User Part (ISUP) overlap signalling to Session Initiation Protocol (SIP).  This mechanism might be implemented when using SIP in an environment where part of the call involves interworking with the Public Switched Telephone Network (PSTN).  [STANDARDS-TRACK]","pub_date":"July 2003","keywords":["pstn","public switched telephone network","ISDN","Integrated Services Digital Network","ISUP","User Part","SIP","Session Initiation Protocol"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC3578","errata_url":null}