The Equalizer,telephone Line, cataloged under National Stock Number 5805-00-167-7664, is classified within Federal Supply Class 5805 (Telephone and Telegraph Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Lau Technologies Div N/a. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5805-00-167-7664 |
| Primary Part Number | 477A |
| Item Name | Equalizer,telephone Line |
| FSC / FSG | 5805 / 58 — Telephone and Telegraph Equipment |
| Manufacturer | Lau Technologies Div N/a |
| Status | ACTIVE |
| AC Voltage Rating | 115.0 VOLTS MINIMUM FIRST ALTERNATE OPERATING POWER RQMT |
| AC Voltage Rating | 230.0 VOLTS MAXIMUM SECOND ALTERNATE OPERATING POWER RQMT |
| Audio Frequency Range in Hertz | +300.0 TO 3400.0 |
| Mounting Configuration | STANDARD 19IN RACK MOUNT IN |
| Functional Description | PROVIDES COMPENSATION FOR ENVELOPE DELAY AND AMPLITUDE DISTORTION EXISTING IN VOICE FREQUENCY LINES AND CHANNELS |
| Frequency Rating | 47.0 HERTZ MINIMUM FIRST ALTERNATE OPERATING POWER RQMT |
| Frequency Rating | 63.0 HERTZ MAXIMUM SECOND ALTERNATE OPERATING POWER RQMT |
| Material | ALUMINUM CASE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 477A PRIMARY | Lau Technologies Div N/a (USA) |
| Reference | Meaning |
|---|---|
| CN-1234A/GCC | 5/2 Secondary reference U.S. Government activity |
NSN 5805-00-167-7664 is a Equalizer,telephone Line, manufactured by Lau Technologies Div N/a, classified under FSC 5805, Telephone and Telegraph Equipment. Status: active.
NSN 5805-00-167-7664 has 1 manufacturer part number on file: 477A (Lau Technologies Div N/a).
1 possible match (shared part number, not a government interchangeability claim): 5935-00-770-2000. Verify interchangeability with system specifications before substitution.
Key specifications for 477A: Overall Height: 5.250 INCHES NOMINAL IN; AC Voltage Rating: 115.0 VOLTS MINIMUM FIRST ALTERNATE OPERATING POWER RQMT; AC Voltage Rating: 230.0 VOLTS MAXIMUM SECOND ALTERNATE OPERATING POWER RQMT; Overall Width: 17.000 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.