3270s
Planning Considerations for3270s attachments can be considered either local or remote. Local
attachments are all devices that do not require telecommunication lines.
However, many devices that are supported for local attachment are also
supported for remote attachment. Remote attachments are devices that
are attached to binary synchronous lines.Such configurations usually
include:• a designated channel • a designated communication controller or transmission control unit • the device or control unit (for terminal attachment and/or RJE
systems) .
Remote Attachments
Both remote cluster and standalone configurations are supported. This
support includes:• Nonswitched point-to-point binary synchronous transmission. • Switched binary synchronous transmission for 3275 terminals equipped
with the Dial feature only.• Cluster configurations of up to 32 display stations and/or printers. • The local 3270 copy function. • EBCDIC (Extended Binary Coded Decimal Interchange Code) transmission
code only.• 3270s supported as virtual machine operator consoles. • CP commands allowing the operator to activate and deactivate the
teleprocessing lines, display stations and printers.• CMS Editor support. • The recording of MDR (Miscellaneous Data Recorder) records and OBR (Outboard Recording) records on the VM/370 error recording cylinder.
TheMDR records are for the station and the OBR records are for the
line. TheCPEREP program edits and prints these records.
The3270 copy support allows the user to assign a screen copy
function to a3270 program function key. pressing that key transfers
the current display image, in its entirety, to an available printer
attached to the same control unit. If the printer is busy or otherwise
not available when the copy function is invoked, the virtual machine
user receives aNOT ACCEPTED message in the screen's status area.
The following restrictions apply toV"/370's support of remote 3270s: • 3270 terminals cannot be used as primary or alternate V"/370 system
consoles.
Part 1. Planning forSystem Generation 51
Planning Considerations for
attachments are all devices that do not require telecommunication lines.
However, many devices that are supported for local attachment are also
supported for remote attachment. Remote attachments are devices that
are attached to binary synchronous lines.
include:
systems) .
Remote Attachments
Both remote cluster and standalone configurations are supported. This
support includes:
with the Dial feature only.
code only.
teleprocessing lines, display stations and printers.
The
line. The
The
function to a
the current display image, in its entirety, to an available printer
attached to the same control unit. If the printer is busy or otherwise
not available when the copy function is invoked, the virtual machine
user receives a
The following restrictions apply to
consoles.
Part 1. Planning for