IBM 56X4927 3270 Coax Network Card ISA 8-Bit PC Adapter 5250 Terminal Legacy

IBM 56X4927 3270 Coax Network Card ISA 8-Bit PC Adapter 5250 Terminal Legacy

ISA expansion card for connecting IBM PC/XT/AT computers to IBM 3270 coaxial terminal networks. Enables legacy mainframe connectivity via coax protocol.

Specifications & What's Included

• Model: IBM 56X4927 (EC A26949)
• Bus Interface: ISA 8-bit
• Connector: Coaxial (BNC-style)
• Protocol: IBM 3270 Coax
• Compatible with IBM PC/XT/AT and compatibles with 8-bit ISA slot
• Card only; no cables or software adapter card connected IBM personal computers to 3270 coaxial terminal networks and IBM mainframe environments. Used in legacy data center and enterprise computing setups where PC-to-mainframe terminal emulation was required. Supported 5250 terminal protocol environments in addition to 3270 networks. Commonly deployed in financial institutions, government, and large corporate IT infrastructures running mainframe systems.
  Condition: Used
  This IBM 56X4927 3270 Coax ISA Network Adapter Card has been inspected and is in good used condition. It was pulled from a working environment where it was in use and functional. The PCB is clean with no visible damage, cracked traces, or missing components. The BNC-style coax connector on the bracket is intact. Normal light handling wear is present on the card and bracket. Please view our photos and contact us with any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function. Visit Our Store

  Shop industrial, solar, scientific, vintage computing, electronic test, audio-visual, office equipment, and manuals in our store. Start shopping »

  Follow Our store

  Want first pick on new arrivals? Tap Save Seller at the top of any page — alerts you the moment we list something new.

  Fast Shipping

  We ship via most standard carriers. Local pick-up available at our Ventura, CA warehouse.

  About Us

  Questions? Contact us anytime. Learn more about us »

  Best Offers

  Want to make an OFFER but don't see a MAKE OFFER button? Use the Contact Seller button at the top of this listing.

  30-Day Guarantee

  100% satisfaction guaranteed. Any issue, just reach out — we'll make it right.

  Thank you for shopping with us.