RFC 3966 local numbers, such as PBX extensions, are unique only within a context and must carry a phone-context parameter that identifies the scope where they are valid.

Checked 2026-09-23

Vendor
IETF
Product
tel URI
Subsystem
number representation
Deployment
standard
Region
not restricted
Release range
RFC 3966
Checked
2026-09-23

Sources

Cite this note

APA

WarmTransfer. (2026, September 23). Enterprise dial plan design and normalization: source note dial-plan-design-rfc3966-local-context. WarmTransfer. https://warmtransfer.net/knowledge/claims/dial-plan-design-rfc3966-local-context

BibTeX

@misc{warmtransfer-claim-dial-plan-design-rfc3966-local-context,
  title  = {Enterprise dial plan design and normalization: source note dial-plan-design-rfc3966-local-context},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/dial-plan-design-rfc3966-local-context},
  note   = {Source note dial-plan-design-rfc3966-local-context, checked 2026-09-23}
}

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