Dynatech RA-1 Mounting Frame Dyna-Patch Mark II EPM-1 EP-2 Cards Telecom Rack

Dynatech RA-1 Mounting Frame Dyna-Patch Mark II EPM-1 EP-2 Cards Telecom Rack

This listing is for a Dynatech Communications RA-1 Rackmount Mounting Frame loaded with Dyna-Patch Mark II cards — specifically 2 EPM-1 cards and 13 EP-2 cards. The RA-1 is a multi-slot rackmount chassis designed to house Dyna-Patch Mark II patch and interface cards in a standard equipment rack. The frame provides backplane connectivity for the cards via card-edge connectors, enabling organized signal patching and routing in a compact rackmount form factor.

Specifications & What's Included

• Manufacturer: Dynatech Communications Inc., Woodbridge, VA 22191
• Mounting Frame Model: RA-1
• Card System: Dyna-Patch Mark II
• Form Factor: Rackmount (approximately 3U)
• Included Cards:
• Dyna-Patch Mark II Model EPM-1 — Qty: 2 (Assembly No. ASSY 200320)
• Dyna-Patch Mark II Model EP-2 — Qty: 13 (PCB No. 200210 REV.)
• EPM-1 card features: DB25 female connector on front faceplate, flat ribbon cable connector on top edge, multi-pin card-edge connector for backplane interface
• EP-2 card features: Three RJ-style connectors on front faceplate, dual DB-style connectors on rear PCB edge, green PCB construction
• Frame connector: Large multi-pin connector (appears to be 50+ pin) on right end panel for external cabling
• Frame construction: Metal chassis with gold-anodized card guide rails

Applications

The Dynatech Dyna-Patch Mark II system was a modular signal patching and distribution platform produced by Dynatech Communications in the 1980s and early 1990s. The RA-1 frame served as the rackmount host chassis, accepting interchangeable Dyna-Patch Mark II cards to build custom patch panel configurations in telecom, data communications, and government/military communications installations. The EPM-1 card functioned as a patch/extension module providing DB25 interface connections, while the EP-2 card provided multi-port RJ-style patching. These systems were commonly found in central office environments, government communications facilities, and enterprise data centers requiring organized, modular signal routing and cross-connect capability. Dynatech Communications, headquartered in Woodbridge, Virginia, was a significant supplier of communications and data patching equipment to both commercial and U.S. government/defense customers during this era.