The 3174 Model 12R is a floor-standing remote controller that support the CCITT X.21 interface for SDLC or X.25 attachment. The Model 12R supports up to sixty-four 3270 devices and twenty-four ASCII devices.

Terminal Attachment

The 3174 Establishment Controllers offer a wide variety of terminal attachments. They can be configured to connect terminals directly, via 3299 Terminal Multiplexers, via optional Terminal Multiplexer Adapters (#3103) and via optional Telephone Twisted Pair Terminal Multiplexer Adapters (#3105), or by a combination of these attachments.

The 3174 has an integrated four-port terminal adapter which permits up to four terminals to be directly attached, or by using one of the following, up to a maximum of 32 terminals can be attached:

• One to four 3299 Terminal Multiplexers
• One to four Terminal Multiplexer Adapter optional features (#3103)
• Any combination of up to four 3299 Terminal Multiplexers and Terminal Multiplexer Adapter optional features.
• One Telephone Twisted Pair Terminal Multiplexer Adapter (#3105)

The 3174 can be expanded to support up to sixty-four 3270 Category-A devices with the 3270 Port Expansion Feature hardware and Configuration Support-B Release 4 or later or Configuration Support-C. Sixty-four ports are attached by the following combination of terminal multiplexers for Model 11L, 11R, 12L, 12R, 13R, and 14R.

• Any combination of up to eight 8 port multiplexers (3299 Model 002 and 003) and Terminal Multiplexer Adapter optional features (#3103).
• One 32 port multiplexer (3299-032, 3299-32T, or feature #3105) and any combination of up to four 8 port multiplexer (3299 Model 002 and 003) and Terminal Multiplexer Adapter optional feature (#3103)s.
• Any combination of up to two 32 port multiplexers (3299-032, 3299-32T, or feature #3105).
• Attachment to Ethernet DIX Version 2 and IEEE 802.3 LAN Networks.
• Supports up to 250 Down Stream PUs (DSPUs) T2.0 when configured as a Gateway or supports up to 32 ISDN only connected PU T2.0s when configured as an ISDN Gateway.
• An optional Type 1 and Type 2 Concurrent Communication Adapter allowing additional IBM host connection(s) with Configuration Support-B or Configuration Support-C.
• Single Link Multihost Support in Configuration Support-B or C, allowing a 3174 via its primary communication interface (TRN, X.25, or ESCON (SNA only)) to connect to multiple IBM hosts.
• An Asynchronous Emulation Adapter feature that provides: 3270 terminal emulation for ASCII terminals for communication to IBM hosts, ASCII terminal emulation for communication between select 3270 devices or IBM PCs operating in CUT mode and ASCII hosts.
• Host-to-3174 communication link speeds up to 64K bps.
• Cabling to devices via direct attachment to IBM Cabling System media. (Type 1, 2 and 3) No Balum cable assembly required.
• Accommodation for up to 10 Licensed Internal Code RPQs per control unit.
• A 5.25-inch diskette drive, and capacity for an optional second diskette drive or an optional 20MB Fixed Disk Drive feature.
• Network Management functions such as: Response Time Monitor, Network Asset Management, Central Site 3174 Customization Utility and Library, electronic delivery of 3174 customization parameters/microcode, and Central Site invocation of 3174 Online tests (including 3174 IML and 3174 Error Log viewing).
• Varying levels of Multiple Logical Terminal support (memory dependent) allowing 3270 Control Unit Terminals (CUT) and ASCII devices multiple logical connections to both IBM and ASCII hosts.

NOTE: When ordering this controller a Communication cable must be specified: V.24 or V.35.