The Converter,telegraph-Telephone Si, cataloged under National Stock Number 5805-01-418-1623, 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 Viking Electronics, Inc.. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5805-01-418-1623 |
| Primary Part Number | SP-155 |
| Item Name | Converter,telegraph-Telephone Si |
| FSC / FSG | 5805 / 58 — Telephone and Telegraph Equipment |
| Manufacturer | Viking Electronics, Inc. |
| Status | ACTIVE |
| Received Line Signal Frequency Rating | 2500.00 HERTZ MINIMUM AND 2700.0 HERTZ MAXIMUM |
| Switchboard Side Current Type | DC |
| Signal Type | RING DOWN |
| Transmitted Line Signal Frequency Rating | 2590.0 HERTZ MINIMUM AND 2610.0 HERTZ MAXIMUM |
| Communication Circuit Quantity | 4 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SP-155 PRIMARY | Viking Electronics, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 218-1055-010 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5805-01-418-1623 is a Converter,telegraph-Telephone Si, manufactured by Viking Electronics, Inc., classified under FSC 5805, Telephone and Telegraph Equipment. Status: active.
NSN 5805-01-418-1623 has 1 manufacturer part number on file: SP-155 (Viking Electronics, Inc.).
Key specifications for SP-155: Overall Height: 1.750 INCHES NOMINAL IN; Received Line Signal Frequency Rating: 2500.00 HERTZ MINIMUM AND 2700.0 HERTZ MAXIMUM; Switchboard Side Current Type: DC; Signal Type: RING DOWN. 5 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.
NSN 5805-01-418-1623 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.