Source note · US emergency calling regulatory requirements
The phase designations Phase 1 Phase 2 Phase I and Phase II occur 62 times across 47 CFR part 9 in total, as 23 occurrences of Phase 1, 17 of Phase 2, 4 of Phase I and 18 of Phase II, and 0 times within subpart F, the multi-line telephone system subpart, where phase language describes the wireless enhanced 911 location obligations of commercial mobile radio service providers instead.
field report · Checked 2026-09-16
- Vendor
- Federal Communications Commission
- Product
- multi-line telephone systems
- Subsystem
- regulation
- Deployment
- not restricted
- Region
- united states
- Release range
- not restricted
- Status
- field report
- Checked
- 2026-09-16
Sources
- 47 CFR part 9 — 911 Requirements — Office of the Federal Register / eCFR · tier 1 standards and regulators · 47 CFR part 9 subpart F compared against the rest of part 9
Cite this note
APA
WarmTransfer. (2026, September 16). US emergency calling regulatory requirements: source note e911-phase-language-is-not-in-the-mlts-rules. WarmTransfer. https://warmtransfer.net/knowledge/claims/e911-phase-language-is-not-in-the-mlts-rules
BibTeX
@misc{warmtransfer-claim-e911-phase-language-is-not-in-the-mlts-rules,
title = {US emergency calling regulatory requirements: source note e911-phase-language-is-not-in-the-mlts-rules},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/e911-phase-language-is-not-in-the-mlts-rules},
note = {Source note e911-phase-language-is-not-in-the-mlts-rules, checked 2026-09-16}
}