For the Macintosh Portable, the DataLink/Mac Portable modem has a low power consuming design (to prolong the life of the computer's battery) and AE Send-Fax and MNP-5 as standard features.
Since MNP-5 (available on all DataLink modems) can transmit and receive compressed data at speeds up to 4800 bps, a hardware/ software flow control protocol is in every DataLink modem. The protocol allows communication between the computer and the modem to speed up to 9600 bps.