Other Names:



Supporting Services + Networks and Communication






z/OS  z/VM  z/VSE  

Short Description:

Operating system for communication controllers


Advanced Communications Function/Network Control Program (ACF/NCP). Operating system for mainframe communications controllers (or front end processor, or FEP) such as the 3705, 3725, 3745, 3746 and Communication Controller for Linux. Initially developed in the 1970s.

Installed onto mainframe operating systems, and loaded into the communication controllers using mainframe commands. Requires ACF/SSP product to generate definitions for networking (ie an NCP Generation), and to load the NCP program itself into the communication controller. 

Protocols supported include:

  • Airlines Line Control (ALC)
  • BSC 3270 terminal connection to SNA applications (with Network Terminal Option)
  • Frame relay
  • Integrated Services Digital Network (ISDN)
  • LAN 802.2, 802.3, and 802.5
  • Start/Stop (S/S) terminal connection to TCAM applications
  • Synchronous Data Link Control (SDLC)
  • X.25 (with X.25 Network Packet Switching Interface)

Other supporting products include Network Routing Facility and Non-SNA Interconnect.

IBM Product IDs:

  • ACF/NCP Version 7.x Product ID: 5648-063
  • ACF/NCP Version 6.x Product ID:  5688-231
  • ACF/NCP Version 5.x Product ID:  5668-738
  • ACF/NCP Version 4.x Product ID:  5668-854

Entry last updated: 04-Jan-2013