TAINET DSD-08A Data Sharing Device enables up to 8 modems or terminals to share a master modem or an access port in a multiple end-device environment. It operates with async or sync equipment at data rates up to 38.4 Kbps.

The TAINET DSD-08A supports three sources of transmit clock:
Internal clock
External clock from the main channel
External clock from sub-channel 1

The DSD-08A's main channel broadcasts information to all sub-channels in parallel. However Sub-channels wait for their turn to transmit to the main channel by data transition or by combining with the RTS/DCD Activate, which is selectable on each channel. If a sub-channel is active, the sub-channel's transmit data and control signals will be connected to the main channel.