DESC: Multi-Tech Systems is a global manufacturer of award winning remote access, Internet and telephony products that allow people to communicate more efficiently and effectively. Multi-Tech invents, designs and builds complete end-to-end communication solutions for small to mid-size businesses and ISPs.??The MT202TD is a low speed asynchronous modem that employs Frequency Shift Keyed (FSK) modulation and works in full duplex over four-wire or in half-duplex over two-wire leased line networks.