CMC Alarm-Matic System 4000 Rackmount Alarm Control Panel Wire Wrap PCB

CMC Alarm-Matic System 4000 Rackmount Alarm Control Panel Wire Wrap PCB

The CMC Alarm-Matic System 4000 is a rackmount telephone and telecom alarm monitoring and control system housed in an aluminum rack-mount enclosure with rack ears. It integrates a wire wrap circuit board with a front panel providing direct operator control over alarm states, line connections, and system modes. The unit is designed to monitor and annunciate alarm conditions across multiple ports and relay points in a telephone or communications facility environment.

Specifications & What's Included

• Manufacturer: CMC
• Model: Alarm-Matic System 4000
• Form factor: Rackmount aluminum enclosure with rack ears
• Circuit board: Wire wrap construction on blue PCB with hand-wired yellow/green connections
• Front panel – Power: On/Off toggle switch with Power indicator lamp
• Front panel – Line connections: Line 1 and Line 2 Tip/Ring terminal jacks
• Front panel – Audible alarm: Horn/buzzer with Alarm Reset push button
• Front panel – Alarm indicators: Major and Minor indicator lamps (red)
• Front panel – Mode toggles: Attended/Unattended, Alternate/Primary, A/B, and Induce switches
• Monitor panel: 24-point labeled monitor strip including Attended, Port 0, Ports 1–3, Dial Request, 2nd Attempt, A Relay, L Relay, 2125 Hz Receive, RC 1st/2nd/3rd Digit, RC Parity, RC Ring Latch, Reclassified, and Timing
• Rack ears included for standard rack mounting

Applications

The Alarm-Matic System 4000 was designed for use in telephone central office, PBX, and telecommunications equipment rooms where monitoring of alarm conditions across multiple circuit ports and relay states is required. Systems like this were commonly deployed from the 1970s through the 1980s to provide centralized alarm annunciation and operator control over attended/unattended modes and line signaling — allowing a single operator position to supervise multiple communication lines and relay circuits. The 2125 Hz receive monitor point is characteristic of single-frequency (SF) tone signaling used in analog telephony of that era, and the RC (Receive Code) digit monitoring points indicate compatibility with multifrequency (MF) or coded signaling schemes common in long-distance and tandem switching environments. This type of panel is of interest to telephone history collectors, legacy telecom system maintainers, and engineers restoring or studying period central office equipment.