3780 protocol is a micro-to-mainframe or PC to PC communications protocol initially developed by IBM that replaced their earlier 2780 file transfer (punch card) protocol.  Both 2780 and 3780 are known as Bisynchronous Remote Job Entry (RJE) Protocols.  The 3780 protocol operates within all electronic data commerce environments.  A few examples include: Automotive (Invoices, Releases, ASNs; and CAD/CAM/CAE/CIM file transfers), Retail (Point-of-Sale applications), Government (IRS Electronic Tax Filing), Transportation (Shipping & Trucking EDI), Banking & Financial (Automatic Teller Machines, Lock Boxes, Credit Card Verifications, Electronic Fund Transfers, Check Clearing), Health Care (Medical and Medicaid Billing), and Federal Reserve Transactions.

Government agencies like the Federal Reserve and the IRS along with countless companies like General Motors, Ford, Sears and Wal-Mart, along with Banks and many other institutions, support the 3780 protocol.

There are many EDI oriented software houses using 3780 communications software.  Such as ADS, Pro_EDI, Prospera, User-Friendly Software, BCG, and others.  Click here for links.  All of these particular E-Commerce software houses use products from CTI Communications.

One of the most popular 2780/3780 packages is the SyncPack2000e for DOS, Windows 95, 98, and NT operating systems.   What's so special about this package?  It eliminates the need for either an internal or external expensive synchronous device to run bi-synchronous software!  This means no more opening the PC, no more configuration of IRQs and I/O addresses.  No more A/B switch boxes.  There's nothing else like it.  Operates on the basis of U.S. Patent 4,700,358 that provides a method by which a modem, using only those components required for asynchronous communications, can perform both synchronous and asynchronous communications and maintain compatibility with existing asynchronous data communication programs.  Connects to any 2780/3780 host in the world.