Tie Communications 2260A Telephone PBX Power Supply 120V AC 9A Multi-Output

Tie Communications 2260A Telephone PBX Power Supply 120V AC 9A Multi-Output

The Tie Communications 2260A is a multi-output DC power supply designed for large telephone PBX (Private Branch Exchange) systems. This desktop unit converts 120V AC input into multiple regulated DC rails, providing the precise voltages required by PBX telephone switching equipment and associated line cards. The 2260A features front-panel accessibility for testing, monitoring, and maintenance, making it suitable for both active installations and legacy system support.

Specifications & What's Included

• Model: Tie Communications 2260A
• Manufacturer: TUC Industries, Inc., Wallingford, Connecticut, USA
• Input: 120V AC, 60Hz, 9A
• Output DC Voltages: 18V, 24V, 15V (three separate rails), 5V, 7.5V (two separate rails) — 8 distinct DC outputs
• Output Configuration: T18V, R24V, L5V, S15V, A15V, T15V, AB7.5V, SB7.5V
• DC Output Indicators: LED status lights per output rail
• DC Output Test Jacks: Front panel accessible for voltage monitoring
• DC Circuit Protection: 5 circuit breakers on front panel
• AC Line Breaker: Accessible via front access door
• AC Line Control: On/off and reset switch on front panel
• Form Factor: Desktop/tabletop unit
• UL Listing: Yes — UL File #E56621, 408E Listed
• Included: AC power cord (3-prong)

Applications

The 2260A is a specialized power supply designed for Tie Communications large-scale telephone PBX systems, particularly models commonly used in business and enterprise telephone exchanges from the 1970s through 1990s. These PBX systems were central switching equipment that managed internal telephone networks before the widespread adoption of digital VoIP systems. The multi-output design allows a single power supply to feed diverse voltage requirements across multiple line cards, trunk interfaces, and control modules within the PBX chassis. The front-panel test jacks and LED indicators enable technicians to quickly diagnose power-rail integrity during installation, troubleshooting, or maintenance. Today, these supplies remain valuable in legacy telephone system restoration, museum/educational installations, and organizations maintaining older PBX infrastructure for historical or operational continuity reasons. The 2260A represents a typical mid-era PBX power supply design from the era when hardwired telephone switching was transitioning from analog crossbar to stored-program control.