47 CFR § 15.603 - Definitions.
---
identifier: "/us/cfr/t47/s15.603"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 15.603 - Definitions."
title_number: 47
title_name: "Telecommunication"
section_number: "15.603"
section_name: "Definitions."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "15"
part_name: "RADIO FREQUENCY DEVICES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 154, 302a, 303, 304, 307, 336, 544a, and 549."
regulatory_source: "54 FR 17714, Apr. 25, 1989, unless otherwise noted."
cfr_part: "15"
---
# 15.603 Definitions.
(a) *Excluded Band:* A band of frequencies within which Access BPL operations are not permitted.
(b) *Exclusion Zone:* A geographical area within which Access BPL operations are not permitted in certain frequency bands.
(c) *Consultation.* The process of communication between an entity operating Access BPL and a licensed public safety or other designated point of contact for the purpose of avoiding potential harmful interference.
(d) *Consultation area:* A designated geographical area within which consultation with public safety users or other designated point of contact is required before an Access BPL may be operated at designated frequencies.
(e) *Low Voltage power line.* A power line carrying low voltage, e.g., 240/120 volts from a distribution transformer to a customer's premises.
(f) *Medium Voltage power line.* A power line carrying between 1,000 to 40,000 volts from a power substation to neighborhoods. Medium voltage lines may be overhead or underground, depending on the power grid network topology.
(g) *Access BPL Database.* A database operated by an industry-sponsored entity, recognized by the Federal Communications Commission and the National Telecommunications and Information Administration (NTIA), containing information regarding existing and planned Access BPL systems, as required in § 15.615(a) of this chapter.