Isoetec EZ-1/96 12100 PBX Phone System 115VAC 480W +24V -24V +10V Cards

Isoetec EZ-1/96 12100 PBX Phone System 115VAC 480W +24V -24V +10V Cards

The Isoetec EZ-1/96 is a card-based PBX (Private Branch Exchange) telephone system manufactured by Isoetec Communications, Inc. This unit is built around a black steel card cage chassis that houses the integrated power supply and a full complement of line and station interface cards. Catalog number 12100 designates the power supply module that drives the system, providing the regulated DC voltages required by all installed cards.

Specifications & What's Included

• Manufacturer: Isoetec Communications, Inc.
• Model: EZ-1/96
• Catalog No.: 12100 (Power Supply)
• Input: 115VAC, 60Hz, 480W
• Input Fuse: 4 Amp S-B
• Output 1: +24VDC, 168W — Fuse 7 Amp S-B
• Output 2: -24VDC, 168W — Fuse 7 Amp S-B
• Output 3: +10VDC, 30W — Fuse 3 Amp S-B
• IRS Level: L
• Manufacture Date: April 1987
• Country of Manufacture: South Korea
• Form Factor: Desktop card cage chassis
• Installed Cards (9 total):
  • Card 12690 (x1)
  • Card 12574 (x1)
  • Card 12500 (x2)
  • Card 12524 (x1)
  • Card 12734 (x1)
  • Card 230319 (x1)
  • Card 12410 (x2)
  • Card 12400 (x1)
• Power cord included (attached)

Applications

The Isoetec EZ-1/96 is a small-to-medium business PBX platform from the mid-to-late 1980s, designed to manage internal telephone extensions and route calls across analog trunk lines. Systems like this one provided features such as call transfer, hold, intercom, and direct inward dialing at a time when PBX hardware was expensive proprietary equipment found primarily in office buildings, hotels, and small enterprises. The card cage architecture allowed the system to be configured for different combinations of trunk and station lines by populating the appropriate interface cards — a common design approach among PBX vendors of that era including Isoetec, Mitel, Nortel, and Comdial. Today, units like this are primarily sought by legacy system maintainers supporting existing Isoetec installations, technicians looking for spare cards (particularly the 12500, 12410, and 12400 series boards), and collectors of vintage business telephone equipment. The installed card set makes this a useful source of multiple board types in a single purchase.