Source note · SS7 and carrier interworking concepts
RFC 4694 requires npdi on the routing tel URI when the Ported Number Translation Indicator bit in the ISUP Forward Call Indicators is set to 1.
Checked 2026-09-24
- Vendor
- IETF
- Product
- tel URI
- Subsystem
- number portability interworking
- Deployment
- carrier
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- RFC 4694: Number Portability Parameters for the "tel" URI — IETF / RFC Editor · tier 1 standards and regulators · Section 5.2.4
Cite this note
APA
WarmTransfer. (2026, September 24). SS7 and carrier interworking concepts: source note ss7-carrier-interworking-pnti-to-npdi. WarmTransfer. https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-pnti-to-npdi
BibTeX
@misc{warmtransfer-claim-ss7-carrier-interworking-pnti-to-npdi,
title = {SS7 and carrier interworking concepts: source note ss7-carrier-interworking-pnti-to-npdi},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-pnti-to-npdi},
note = {Source note ss7-carrier-interworking-pnti-to-npdi, checked 2026-09-24}
}