Multitech MT56DSU-R Owner's Manual download pdf (Page 47)

Appendix A - Application Examples

DDS Multi-Point (Polled) Application

Since your Central Office (CO) equipment must include Multi-point

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-R at the host end is the Master Station (also called

the Control Station), which typically has RTS forced on. The

attached MT56DSU-Rs are called "Remote stations and have RTS

controlled by the DTE.

Multi-point 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. All

stations on the same multi-point circuit must run at the same bit rate

(any of the DDS customer service rates).

The figure below shows a typical Multi-point (Polled) application.

Figure A-2. DDS Multi-Point Polled Application

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Multitech MT56DSU-R Owner's Manual Page 47