Multi-Tech Systems MT56DSU-S manual DDS Multipoint Polled Application

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.

DSU

(“Master Station”)

Host with

Database

Application

DDS Network

with

Multipoint

Equipment

DTE		DSU	DSU	DTE
	(“Remote Station”)		(“Remote Station”)

DTE	DSU	DSU	DTE
	(“Remote Station”)	(“Remote Station”)

Figure A-3. DDS Multipoint (Polled) Application

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