The 3174 Model 21R is a table-top remote controller that supports the EIA 232D/CCITT V.24/V.28 or CCITT V.35 interfaces for SDLC, BSC, or X.25 remote link attachment. The Model 61R supports up to sixteen 3270 devices and eight 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)

Communications Facilities

3174 Models 11R, 12R, 21R, 61R, 62R, 90R, 91R, and 92R operate in data half-duplex point-to-point or multipoint modes on duplex or half-duplex nonswitched facilities, and in half-duplex point-to-point mode on switched facilities as listed below.

COMMUNICATION FACILITIES
3174 MODEL 11R/21R/61R/90R/91R:

@ = Not available on Model 90R.

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