Source note · PRI and TDM gateway interworking
Under RFC 3398, an ISUP cause value not listed in the mapping table SHOULD be answered with SIP 500 Server Internal Error.
Checked 2026-09-24
If a cause value other than those listed below is received, the default response '500 Server internal error' SHOULD be used.
- Vendor
- IETF
- Product
- RFC 3398
- Subsystem
- cause-to-status mapping
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3398
- Checked
- 2026-09-24
Sources
- RFC 3398: Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping — IETF / RFC Editor · tier 1 standards and regulators · Section 7.2.4.1, paragraph preceding the table
Cite this note
APA
WarmTransfer. (2026, September 24). PRI and TDM gateway interworking: source note legacy-pri-tdm-unlisted-cause-500. WarmTransfer. https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-unlisted-cause-500
BibTeX
@misc{warmtransfer-claim-legacy-pri-tdm-unlisted-cause-500,
title = {PRI and TDM gateway interworking: source note legacy-pri-tdm-unlisted-cause-500},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-unlisted-cause-500},
note = {Source note legacy-pri-tdm-unlisted-cause-500, checked 2026-09-24}
}