We will be performing system updates on Sunday, July 21st, from 9-noon ET. You may experience brief service interruptions during that time.
Browse Prior Art Database

ISDN User Part (ISUP) Cause Location Parameter for the SIP Reason Header Field (RFC8606)

IP.com Disclosure Number: IPCOM000258814D
Original Publication Date: 2019-Jun-01
Included in the Prior Art Database: 2019-Jun-18
Document File: 7 page(s) / 19K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Jesske

Related Documents

Other References:


The SIP Reason header field is defined to carry ISUP (ISDN User Part) cause values as well as SIP response codes. Some services in SIP networks may need to know the ISUP location where the call was released in the PSTN (Public Switched Telephone Network) to correctly interpret the reason of release. This document updates RFC 3326 by adding a location parameter for this purpose.