The 2720 MainStreet Internet Termination Unit and the 2721 MainStreet Router Termination Unit are integrated routers and Data Termination Units (DTUs).

Both units provide an integrated router DTU with end-to-end path management provided by the MainStreetXpress 46020 Network Manager.

The 2720 MainStreet Internet Termination Unit provides fixed link Internet access to 128 kbit/s, while the 2721 MainStreet Router Termination Unit provides frame relay access to Ethernet-connected Local Area Networks (LANs).

The 2720 MainStreet and 2721 MainStreet units were designed to address the growing demand for affordable alternatives in the expanding corporate intranetwork and Internet access markets. Both units provide integrated network management and scalability.

By offering ISDN-like access without the cost and limitations associated with ISDN -- switched network congestion, long hold times caused by limited dedicated and semi-dedicated lines, and high capital costs associated with implementing and upgrading ISDN access -- the units are an attractive alternative for corporate telecommuting and Internet access.