FEATURES/BENEFITS
- * Interface - EIA RS-232, CCITT V.24, DB-25 Female Connectors
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- * Data Rates - Synchronous or Asynchronous up to 128Kbps
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- * Anti-Streaming - Automatic or Manual for unattended
Circuit Restoral
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- * Individual Subchannel Enable / Disable Switches
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- * Visual Indication of Subchannel Activity
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- * Receive Data - Broadcast to all Subchannels
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- * Transparent to Data
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- * Fully Cascadable
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- * External Clocking
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- * Sturdy Metal Enclosure
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- * 110/220VAC Switch Selectable
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- * +/- 15KV ESD Protection
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- * Approvals - UL and CSA
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DESCRIPTION
The Modem Sharing Device (MSD) products consist of 4 and
8 port units. The MSDs provide the network manager with a
cost effective means of expanding existing, leased line polled
networks without adding computer ports or communications links.
With the MSD's, up to eight terminals can share the same port
and communications link using the contention and control protocols
normally resident in the host hardware and software. Once
installed, system and network efficiency are increased through
higher host processor utilization coupled with the significant
decrease in idle time between host / terminal traffic sessions.
Ideal for either synchronous or asynchronous network environments,
the MSDs are protocol transparent at data rates up to 128Kbps.
Data arriving at the Master Port is continually broadcast
to all Subchannels. The attached terminal device that raises
the RTS control signal is automatically given control of the
MSD until data transmission is complete. Clocking is accomplished
from the attached Modem.
The MSDs incorporate optional Anti-Streaming circuitry. If
enabled, Anti-Streaming will automatically remove a defective
terminal from service if the Data / Control criteria is present
for the user predefined selection period.
Housed in a sturdy metal enclosure and equipped with an internal
110/220VAC switch selectable linear power supply, the MSDs
will provide in excess of 100,000 hours of reliable service.
The MSDs have a three year warranty and a 24 hour turnaround
on warranty repairs.
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