Description: This variable returns the transmit status of the internal detection scheme for this bus. It returns internal-bus-OK(1) if internal transmits are succeeding and no other bus errors are evident. If internal transmits are not succeeding or there is another bus error, it returns a value that tells you what the problem is, i.e., lost-crs(2), excess-collisions(3), or other-tx-error(4). If internal detection is not enabled, this variable returns not-in-use(200).