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Operating Mode
Choices are Protocol Enveloping, Protocol Conversion, and Dynamic.
Valid choices for protocol conversion operations are Protocol Conversion and
Dynamic.
For a keyboard display, or part of a keyboard display with printer, protocol
conversion operations begin after a LU type 2 BIND is received from the host. If
defined for Dynamic operations, the 3708 also allows a LU type 1 BIND and begin
operating in protocol enveloping mode. See the following table:
Device
Protocol
Protocol
Class
Enveloping Only
Conversion Only
Dynamic
Keyboard
Only LU type 1
Only LU type 2
Either LU type 1
Display
BINDs accepted;
BINDs accepted;
(NTO) or LU
operate as LU
operate using
type 2 (3270
type 1 NTO.
3270 data
Data Stream)
stream.
BIND accepted.
Keyboard
Only LU type 1
NjA
NjA
Printer
BIND accepted,
NTO.
Printer
NjA
Either LU type 3
Either LU type 3
(DSC) or LU
(DSC) or LU
type 1 (SCS)
type 1 (SCS)
BINDs accepted.
BINDs accepted.
Keyboard
Display same as
Display same as
Display same as
Display with
"Keyboard
"Keyboard
"K~yboard
Printer
Display";
Display";
Display";
Printer same as
Printer same as
Printer same as
··Printer."
"Printer. "
"Printer."
3270 Model Emulation
Choices are 2,3,4, and 5.
This option determines the maximum terminal screen size supported by this port.
Screen sizes are:
Model
Emulation
Model 2
Model 3
Model 4
Model 5
Rows x Columns
24 x 80
32 x 80
43 x 80
27 x 132
The default value is 2.
Screen sizes greater than Model 2 are selected at the expense of 3708 system buffers.
To improve performance and throughput, 3708 ports should not be configured for
screen sizes larger than are going to be used on the port.
Chapter 4. Protocol Conversion Mode
4-25
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