Federal regulations · Through 2026-08-25 · Newer source version available

47 CFR 90.557: Secondary fixed signaling operations.

Trunked and conventional 700 MHz narrowband systems may conduct fixed ancillary signaling and data transmissions subject to the following requirements:
(a) Operations are permitted only on:
(1) Narrowband State License channels specified in § 90.531(b)(5), subject to the discretion of the relevant State licensee; and
(2) Narrowband General Use channels specified in § 90.531(b)(6), subject to the discretion of the regional planning committee.
(b) All operations must be on a secondary, non-interference basis to the primary mobile operation of any other licensee.
(c) The output power at the remote site must not exceed 30 watts.
(d) Automatic means must be provided to deactivate the remote transmitter in the event the carrier remains on for a period in excess of three minutes.
(e) Operational fixed stations authorized pursuant to this section are exempt from the requirements of §§ 90.425, 90.429, and 90.559.
(f) Any operations undertaken in a shared use environment must be conducted pursuant to an agreement between the licensee and each participant, as set forth in § 90.179.

Where this section sits in the code

Title 47—Telecommunication
CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION
SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES
PART 90—PRIVATE LAND MOBILE RADIO SERVICES
Subpart R—Regulations Governing the Licensing and Use of Frequencies in the 763-775 and 793-805 MHz Bands

Trunked and conventional 700 MHz narrowband systems may conduct fixed ancillary signaling and data transmissions subject to the following requirements:

(a) Operations are permitted only on:

(1) Narrowband State License channels specified in § 90.531(b)(5), subject to the discretion of the relevant State licensee; and

(2) Narrowband General Use channels specified in § 90.531(b)(6), subject to the discretion of the regional planning committee.

(b) All operations must be on a secondary, non-interference basis to the primary mobile operation of any other licensee.

(d) Automatic means must be provided to deactivate the remote transmitter in the event the carrier remains on for a period in excess of three minutes.

(e) Operational fixed stations authorized pursuant to this section are exempt from the requirements of §§ 90.425, 90.429, and 90.559.

(f) Any operations undertaken in a shared use environment must be conducted pursuant to an agreement between the licensee and each participant, as set forth in § 90.179.

Collected 2026-08-27T02:26:28Z. Source file · JSON

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