The DL200 T1 SMDS DSU provides T1 SMDS network access to SMDS-compatible internetworking equipment such as bridges and routers as well as channel extension systems.

The DL200E provides E1 SMDS network access for internetworking equipment such as routers and host computer networking equipment.

The DL220E E1 SMDS DSU is an SMDS access device that connects customer premises equipment such as routers to an E1 SMDS network. It is based on the DL200E, the industry’s leading E1 SMDS access product. The DL220E supports SMDS DXI network access.

The DL3200 T3 SMDS DSU is a broadband networking device that provides access to SMDS network services at T3 rates.

The DL3200E E3 SMDS DSU provides a 34 Mbps E3 SMDS data access interface to switched multimegabit data services (SMDS). SMDS is a connectionless, packet switching service, which brings "LAN-like" functionality to wide-area networks.