4606-D4100 Industrial Control Module/Panel w/ Status LEDs Multi-Pin (CB208)

4606-D4100 Industrial Control Module/Panel w/ Status LEDs Multi-Pin (CB208)

Item specifics

• NSN: 5805-01-214-2779

• Part number: 4606-D4100

• FSCM/CAGE: 10241

• Type: Telephone trunk signaling unit (DF/SF, E&M)

• Contract: F04606-88-D-0010

• Condition code: A (serviceable)

• Quantity: 1

Description

New old stock Dual Frequency Signaling Unit from US Air Force telephone and communications supply.

This is a plug-in rack card for military telephone trunk circuits. It converts E&M (M lead / E lead) supervisory signaling to in-band tone signaling for long-haul voice circuits. The front panel has a full set of status LEDs, test jacks, a receive level adjustment, and a –50V talk-battery connection.

Front panel

• LEDs: M, E, LOS, ROS, FIL, LA, RA, PWR

• REC LEV adjustment

• Test jacks: DF M/E, TID/RID, TIL/RIL, TL/RL, –50V, GRD, SF

• Gold edge-card connector on the rear, in clean condition

Paperwork included

• The original factory test sheet is still rubber-banded to the unit: tested 10-23-89 and QA signed off 10/30/89, with handwritten calibration values and the full LED checkout sequence

• DD Form 1574-1 Serviceable tag, Condition Code A, dated 16 JAN 1990

• The original NSN/contract label on the shipping box

Contract F04606-88-D-0010. Shipped in its original carton with anti-static bubble wrap. The aluminum chassis and front panel are clean, with no visible wear.

A great piece for vintage telecom and Bell System–era collectors, military communications history, or legacy system support. Sold as-is, untested by me. Please see all photos.