Transmission Buffer Size

The minimum size of a transmission buffer is 300 bytes which allows the transmission buffer to contain a complete 256-byte record, compression bytes, and BSC control bytes. The maximum size of a transmission buffer is 32K. A BSC connection can use a smaller buffer size than a CTC connection because the time to retransmit and the probability of errors on a BSC connection are greater than on a CTC connection. Each job header, data set header, and job trailer must be the first record in its transmission block.

Initial signon record flag NCCIPACK allows you to send multiple NJE headers in a single buffer. In all other cases, you must send the job header, data set header, and job trailer in separate buffers.