SNAX/XF LU Network Services Manual

ESS LU Attributes That Override SCF LU Attributes
Using LUNS
097841 Tandem Computers Incorporated 2–27
PROTOCOL Attribute The syntax for the PROTOCOL attribute is as follows:
PROTOCOL { CRT | ITI }
This attribute specifies the application interface protocol that SNAX/XF uses when
communicating with the corresponding LU. If the LU is a terminal attached to a 6600
controller, the protocol selected must be either CRT or ITI. This attribute is required
for the LU object type.
The different protocols that can be specified are as follows:
CRT specifies that this LU uses the standard 3270 full-screen block
protocol. An application that communicates with this LU must
define and expect to receive 3270 data streams that contain screen-
formatting control characters.
ITI specifies that the device expects to converse with Tandem
applications using the standard 3270 conversational (line-at-a-time)
mode.
RECSIZE Attribute The syntax for the RECSIZE attribute is as follows:
RECSIZE integer
This attribute specifies the length, in bytes, of a terminal or printer line, CRT screen, or
RU, depending on the PROTOCOL attribute.
The following PROTOCOL dependencies apply:
If the PROTOCOL attribute specifies CRT, the RECSIZE attribute specifies the CRT
screen or printer buffer size.
If the PROTOCOL attribute specifies PRT, the RECSIZE attribute specifies the
printer line length plus 5 bytes.
If the PROTOCOL attribute specifies ITI, the RECSIZE attribute specifies the
terminal line length plus 16 bytes.
If the PROTOCOL attribute specifies SNALU, the definition of RECSIZE is in addition
to SNALU according to the following guidelines:
For LUs subordinate to a primary line, RECSIZE specifies the SNA RU length.
For LUs subordinate to a secondary line, RECSIZE specifies the SNA RU length if
byte 11 of the SNA BIND request is 0. If byte 11 is not 0, the value of RECSIZE is
ignored.
The valid range for RECSIZE is from 1 to 4096 bytes. The default value for RECSIZE is
1024 bytes.