BSC connection

A binary synchronous (BSC) connection for an NCP-attached peripheral node is defined by the following definition statements in the NCP major node:

GROUP (defines BSC characteristics)
LINE (defines the BSC link)
CLUSTER (defines the BSC cluster controller)
TERMINAL (defines each BSC terminal)

Note: Code PU=YES on the GROUP or LINE definition statement to inform VTAM® that the cluster controller and the terminals attached to it are 3270 BSC devices that are to be treated as a physical unit and logical units, respectively.

The FEATUR2 operand describes machine features of the non-SNA device. In the following sample, FEATUR2=MODEL2 indicates that the default screen size for the BSC 3270 is 1920 characters.

GA03BSC2 GROUP PU=YES,
               CLOCKNG=DIRECT,
               CRITSIT=YES,
               DIAL=NO,
               DUPLEX=FULL,
               NEGPOLP=.2,
               REPLYTO=23,
               RETRIES=(2,1,2),
⋮
               TYPE=NCP,
               PAUSE=0,
               POLIMIT=(10,WAIT),
               POLLED=YES,
               LNCTL=BSC
*
LA03288  LINE  ADDRESS=(288,40-09)
CA032881 CLUSTER CUTYPE=3271,
               GPOLL=40407F7F
TA03288A TERMINAL ADDR=60604040,
               POLL=40404040,
               TERM=3277
TA03288B TERMINAL ADDR=6060C1C1,
               POLL=4040C1C1,
               TERM=3277
TA03288C TERMINAL ADDR=6060C2C2,
               POLL=4040C2C2,
               TERM=3277
TA03288D TERMINAL ADDR=6060C3C3,
               POLL=4040C3C3,
               TERM=3277

You can change the values of the PAUSE and POLIMIT operands, shown in the preceding sample code, using the MODIFY POLL and MODIFY NEGPOLL commands respectively. These values can be set as often as you want while the NCP is active. When the NCP is deactivated and later reactivated, the parameter values of the NCP definition are in effect.

If you define a configuration restart file for the NCP, the parameters for the PAUSE and POLIMIT operands are restored to their checkpointed values, regardless of whether you are using a WARM start for NCP reactivation.