gtps2m0m | ACF/SNA Data Communications Reference |
When developing your own applications, you must use the CSNB segment to access NCB records. This segment returns the address of the appropriate 381-byte fixed file NCB record or 381-byte long-term pool file NCB record for an LU, or it can return the NCB record itself.
See Retrieving NCB and SPA Data Records (CSNB) for more information about the CSNB segment.