Multi-Tech Systems MT56DSU-S - Manual (Page 30)

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Appendix
DDS Multipoint (Polled) Application
Since your Central Office (CO) equipment must include “Multipoint Junction Units” (MJUs) and other special
arrangements for this type of service, you may need to coordinate efforts with your network service provider.
The MT56DSU-S at the host end is the Master Station (also called the “Control Station”), which typically has
RTS forced on. The attached MT56DSU-Ss are called “Remote stations” and have RTS controlled by the
DTE.
Multipoint DDS provides communication between a control station and two or more remote stations. All data
transmitted by the control station is sent to each remote station. For data transmitted from the remote stations,
the MJUs combine bit streams from the remote stations into a single, serial bit stream sent to the control
station.
The figure below shows a typical Multipoint (Polled) application.
DDS Network
with
Multipoint
Equipment
DTE
DTE
DTE
DTE
DSU
(“Master Station”)
Host with
Database
Application
DSU
(“Remote Station”)
DSU
(“Remote Station”)
DSU
(“Remote Station”)
DSU
(“Remote Station”)
Figure A-3. DDS Multipoint (Polled) Application