49 CFR § 220.37 - Testing radio and wireless communication equipment.

---
identifier: "/us/cfr/t49/s220.37"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 220.37 - Testing radio and wireless communication equipment."
title_number: 49
title_name: "Transportation"
section_number: "220.37"
section_name: "Testing radio and wireless communication equipment."
chapter_name: "FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "220"
part_name: "RAILROAD COMMUNICATIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 20102-20103, 20103 note, 20107, 21301-21302, 20701-20703, 21304, 21311; 28 U.S.C. 2461 note; and 49 CFR 1.89."
regulatory_source: "63 FR 47195, Sept. 4, 1998, unless otherwise noted."
cfr_part: "220"
---


# 220.37 Testing radio and wireless communication equipment.

(a) Each radio, and all primary and redundant wireless communication equipment used under §§ 220.9 and 220.11, shall be tested as soon as practicable to ensure that the equipment functions as intended prior to the commencement of the work assignment.

(b) The test of a radio shall consist of an exchange of voice transmissions with another radio. The employee receiving the transmission shall advise the employee conducting the test of the clarity of the transmission.