In addition to the basic serial port settings,
the 3964R protocol also can be configured. Here,
the timeout values (CHAR_TIMEOUT, QUITT_
TIMEOUT, TRANS_TIMEOUT) can be set, as well
as the maximum number of receive and output buffers
(MAX_TX_BUFFER, MAX_RX_BUFFER). In order
to avoid an unnecessarily long cycle time during a test
phase, the timeout values are in the ms range.