Configurations (Terminals) • IBM 3272 Control Unit Model 2 for attachment of up to thirty-two 3277
Display stations Model 2, 3284 Printers Model 2, 3286 Printers Kodel
2, 3287 Printer Models 1 and 2, and 3288 Line Printers Model 2. To
support this configuration, the following are required:
--Device Adapter feature (13250) is required if more than 4 devices
are attached to the 3272. Up to 4 additional devices can be
attached with each device adapter.
--A 3271/3272 Attachment (18330) is required to attach each 3287 Printer. • IBM 3274 Control Unit Kodel lB (supported as a 3272) for attachment
of up to 32 display stations and printers. All of the 32 devices can
be 3278 Display Stations Models 2, 3, and 41 (supported as 3277s),
3287 Printers Models 1 and 2, (supported as 3284s or 3286s), and 3289
Line Printers Models 1 and 2. (supported as 3288s). A maximum of 16
of the 32 devices can be 3211 Display Stations Model 2, 3284 Printers Model 2, 3286 Printers Model 2, 3281 Printers Models 1 and 2, and
3288 Line Printers Kodel 2. To support this configuration, the
following are required:
--The basic 3214 Control Unit permits attachment of up to 8 devices
(3278, 3287, and 3289). At least one 3278 is required.
--Each of the Terminal Adapter Types Al, A2, and A3 ('6901, 16902, and 16903) permits the attachment of up to 8 additional devices per
adapter (types 3218, 3281, and 3289). Only one of each type
terminal adapter is permitted. Terminal Adapter Type Al is a
prerequisite to Type A2, and A2 is a prerequisite to Type A3.
--Terminal Adapter Type Bl (#1802) permits the attachment of up to 4 additional devices (types 3277, 3284, 3286, 3287, and 3288). Only one adapter is permitted.
--Each of Terminal Adapter Types B2, B3, and B4 (t1803, #7804 and
#7805) permits the attachment of 4 additional devices per adapter
(types 3211, 3284, 3286, 3287 and 3288). Only one of each type
terminal adapter is permitted. Terminal Adapter Type Bl is a
prerequisite to Type B2, Type B2 is a prerequisite to Type B3, and
Tvpe B3 is a prerequisite to Tvpe B4. Terminal Adapter Tvpes Al and B3 are mutually-exclusive. ----- --A 327q/3276 Attachment (18331) is required for each 3287 Printer Models 1 or 2 that attaches to the basic 3214 Control Unit, or that
attaches to Terminal Adapter Types Al, A2, or A3. A 3271/3272
Attachment (#8330) is required for each 3287 Printer Model 1 or 2
that attaches to Terminal Adapter Types Bl, B2, B3, or B4. And only needed if a Type B adapter is used:
--Control storage Expansion feature (11801) provides the ability to
access control unit storage addresses above 64K.
--Extended Function Storage feature ('3622) provides additional
storage required to support particular attachments or
configurations. Control Storage Expansion feature (11801) is a
prerequisite.
lModels 3 and 4 are supported as Model 2 via hardware default. Part 1. Planning for System Generation 115

Configurations (Terminals)
The following control units can be remotely attached to leased lines via
a 2701 Data Adapter Unit, a 2703 Transmission Control Unit, a 3704/3705 Communications Controller in emulation mode, or an Integrated Communications Adapter (ICA) to support 3270 devices: • IBM 3271 Control Unit Model 2 for attachment of up to thirty-two 3277
Display Stations Model 2, 3284 Printers Model 2, 3286 Printers Model 2, 3287 Printers Models 1 and 2, and 3288 Line Printers Model 2. To
support this configuration, the following may be required:
--Device Adapter feature (13250) is required if more than 4 devices
are attached to the 3271. Up to 4 additional devices can be
attached with each device adapter.
--A 3271/3272 Attachment (18330) is required to attach each 3287
Printer Model 1 or 2. --Copy feature (11550) is required to use the VM/370 full-screen copy
function.
--Transmission Speed feature (17820 or 17821) is required. • TBM Control nnit Model 1C (snpported a l271) fnr of up to 32 display stations and printers. All of the 32 devices
can be 3278 Display Stations Models 2, 3, and 41 (supported as
327 7s), 3287 Printers Models 1 and 2, (supported as 3284s or 3286s),
and 3289 Line Printers Models 1 and 2. (supported as 3288s). A
maximum of 16 of the 32 devices can be 3277 Display Stations Model 2, 3284 Printers Model 2, 3286 Printers Model 2, 3287 Printers, Models 1
and 2, and 3288 Line Printers Model 2. To support this
configuration, the following are required:
--The basic 3274 Control Unit permits attachment of up to 8 devices
(3278, 3287, and 3289). At least one 3278 is required.
--Each of Terminal Adapter Types Al, A2, and A3 (16901, 16902, and 16903) permits the attachment of up to 8 additional devices per
adapter (types 3278, 3287, and 3289). Only one of each type
terminal adapter is permitted. Terminal Adapter Type A1 is a
prerequisite to Type A2, and Type A2 is a prerequisite to Type A3.
--Terminal Adapter Type Bl (17802) permits the attachment of up to 4 additional devices (types 3277,3284, 3286, 3287, and 3288). Only one adapter is permitted.
--Each of Terminal Adapter Types B2, B3, and B4 (17803, 17804, and 17805) permits' the attachment of 4 additional devices per adapter
(types 3277, 3284, 3286, 3287, and 3288). Only 1 of each type of
terminal adapter is permitted. Terminal Adapter Type B1 is a
prerequisite to Type B2, Type B2 is a prerequisite to Type B3, and
Type B3 is a prerequisite to Type B4. Terminal Adapter Types A and B are mutually exclusive.
--A 3274/3276 Attachment (18331) is required on the printer for each
3287 Printer Kodel 1 or 2 that attaches to the basic 3274 Control Unit, or that attaches to Terminal Adapter Types Al, A2, or A3. A 3271/3272 Attachment (18330) is required on the printer for each
3287 Printer Model 1 or 2 that attaches to Terminal Adapter Types
Bl, B2, B3, or B4. --Copy feature (11550) is required if you are planning to use the VM/370 full-screen copy function. IModels 3 and 4 are supported as Model 2 via hardware default.
116 IBM VK/370 Planning and System Generation Guide