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RSD-1 Digital Sharing device from RAD 

The RSD-1 Digital Sharing Device enables up to 4 modems or terminals to share a master modem, a multiplexer or a computer port in a multipoint environment. The RAD RSD-1 is compatible with asynchronous or synchronous equipment at data rates up to 19.2 kbps.
RSD-1 5570020000 RSD-1/48 5570200000 RSD-1/B 5570080000 RSD-1/R 5570060000
Three clock modes are supported with the RAD RSD-1:
External from the main channel
External from subchannel 1.

A built-in buffer in the RSD-1 overcomes possible phase differences between the RSD-1 main channel transmit clock and the clocks of modems connected to the subchannels.

A DCE/DTE switch for main channel and each subchannel allows setting the channelís interface as DCE or DTE. 

The main channel of the RSD-1 broadcasts to all subchannels in parallel. Subchannels contend to transmit to the main channel by activating RTS/DCD or by data transitions (strap-selectable). If the RTS/DCD is active or data transitions occur on a subchannel, its transmit data and control signals are connected to the main channel. When RTS/DCD drops or data transitions stop, the control circuitry is switched to monitor
other subchannels. A subchannel is disconnected immediately after it drops RTS/DCD or transmits 15 idle bits.

On the RSD-1, a subchannel can be disabled by automatic circuitry if it stays active for longer than a preset time, blocking all other subchannels (streaming). The automatic disable resets itself as soon as the subchannel RTS/DCD drops, or 15 idle bits are transmitted (Data Contention). Individual subchannel indicators on the front panel indicate if a subchannel was disabled by automatic circuitry. Manual disabling of a subchannel is also enabled via individual subchannel switches.

RSD-1 is available as a desktop unit or as a rack-mount card for the RSD-MN-12 rack. The rack can carry up to 12 RSD-1 cards and is supplied with 64-pin connectors. One or two power transformers are installed inside the rack providing hot standby backup.

RSD-1 5570020000 RSD-1/48 5570200000 RSD-1/B 5570080000 RSD-1/R 5570060000 Application

RSD-1 product data sheet (pdf)

Immediate price quote - Call 727-398-5252 or e-mail cs@bestdatasource.com

Don't forget to ask about  RADCare support for your RAD products.

Other RAD sections of interest:
RAD Accessories, RAD ATM products, RAD Baseband modems and last mile access, RAD Cables & Misc, RAD Digital Service Access Devices ( FCD ), RAD Fiber Optic modems and Converters, RAD IP and Ethernet Access, RAD Kilomux Data, Voice, Fax and LAN integrating Multiplexers, RAD LRS Modem rackRAD MegaplexRAD Networks Management, RAD Optimux Fiber MultiplexersRAD Sharing Devices, RAD Short Range ModemsRAD T1/E1 Digital Cross Connects ( DACS ), RAD T1/E1 Digital Cross Connect (DACS) for single E1 / T1 applications, RAD TDMoIP, RAD Voice Interface Converters, RAD Voice Trunking Gateway

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Last modified: January 17, 2015
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