Source note · PRI and TDM gateway interworking
RFC 3398 maps the resource-unavailable ISUP causes 34, 38, 41, 42 and 47 to SIP 503 Service Unavailable.
Checked 2026-09-24
- 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 table, resource unavailable class
Cite this note
APA
WarmTransfer. (2026, September 24). PRI and TDM gateway interworking: source note legacy-pri-tdm-resource-causes-to-503. WarmTransfer. https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-resource-causes-to-503
BibTeX
@misc{warmtransfer-claim-legacy-pri-tdm-resource-causes-to-503,
title = {PRI and TDM gateway interworking: source note legacy-pri-tdm-resource-causes-to-503},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-resource-causes-to-503},
note = {Source note legacy-pri-tdm-resource-causes-to-503, checked 2026-09-24}
}