The QMT-R is a rack-mount version of the QMT-1B. It is equivalent to between 1 and 4 QMT-1B's, depending on the version purchased. (QMT-R1 = 1 QMT-1B, QMT-R3 = 3 QMT-1B's, etc.)
What is the difference between the QMT-1B and the QMT-R?
The QMT-R is a rack-mount version of the QMT-1B. It is equivalent to between 1 and 4 QMT-1B's, depending on the version purchased. (QMT-R1 = 1 QMT-1B, QMT-R3 = 3 QMT-1B's, etc.)