Telrad Digital Key BX PBX 76-110-0000/1 Telephone System 115VAC S-128 KSU

Telrad Digital Key BX PBX 76-110-0000/1 Telephone System 115VAC S-128 KSU

The Telrad Digital Key BX is a digital key telephone system KSU (Key Service Unit) designed for small-to-medium business telephone environments. Manufactured by Telrad Telecommunication and Electronic Industries Ltd. of Israel, the Digital Key BX serves as the central control unit for a multi-line digital key phone system, managing internal extensions and external telephone lines. This unit carries catalog number 76-110-0000/1 and is rated 115V AC, 50/60Hz, 8A.

Specifications & What's Included

• Manufacturer: Telrad Telecommunication and Electronic Industries Ltd.
• System: Digital Key BX Telephone System
• Catalog Number: 76-110-0000/1
• Power Input: 115V AC, 50/60Hz, 8A
• Power Supply Module: M-2 — Input: 115VAC / 2A, 50Hz; Output: +5VDC / 6.3A, -5VDC / 1.8A
• Memory Cartridge: S-128 Generic installed (Cat. No. 76-111-6350/3, Release SB6.03F, Date 1.12.98)
• Processor Board: MPD386, Cat. No. 76-210-1300, Style D4
• FCC Registration Numbers: ARAISR-18430-KF-E / ARAISR-18427-MF-E
• Ringing Equivalence: 3.9B
• Certifications: UL Listed (3E77), CSA (LR97159-3), FCC Parts 15 and 68
• Country of Manufacture: Israel
• QC Date: 10/97
• Form Factor: Freestanding / wall-mount cabinet (KSU)
• Multiple card slots visible in chassis — line and station cards installed
• Note: Plastic face plate is missing (see photos)

Applications

The Telrad Digital Key BX is a late-1990s digital key telephone system designed for small to medium-sized businesses requiring multi-line telephone capability. Key systems of this type differ from a full PBX in that each phone set has direct line access via dedicated buttons, giving users clear visibility of which lines are in use. The Digital Key BX KSU houses all the switching, power, and line-interface electronics in one chassis, with expansion cards in the card cage providing CO line and digital station connections. Telrad was an Israeli telecommunications manufacturer active through the 1990s and 2000s, supplying key and hybrid telephone systems to business markets in North America, Israel, and elsewhere. Systems like the Digital Key BX are typically still found in legacy small-office environments or acquired for parts and repairs to maintain existing Telrad installations.