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Patton Electronics 3012/V24
2-Port, V.24, Modem-Sharing Device

Patton Model 3012/V24
2-Port, V.24, Modem-Sharing Device
Now up to eight sync or async devices can share one modem in a polled or contention environment.
 
 
  Features & Benefits
  • Speed/code transparency up to 64 kbps (properly shielded, low capacitance cables must be used for speeds faster than 38.4 kbps)
  • Automatic anti-streaming
  • Operation is transparent to data
  • Individual sub-channel enable/disable switches
  • Selectable RTS/CTS time delay
  • Fully cascadable
  • Sturdy metal enclosure
  • Internal power supply; switch selectable for 110- or 220-VAC
  • UL, CSA, and FCC Class A approvals
 
Overview  

The Model 3012/V24 Modem Sharing Device (MSD) enables users to expand their polled or contention networks without acquiring additional data lines or modems. DSDs act as combined modem and port sharing devices.

 

With one of these bi-directional units, up to eight sync or async terminal devices can share one modem in a polled or contention environment. Data arriving at the master port is continually broadcast to all sub-channels. The first sub-channel to activate RTS is automatically given control of the master port. When RTS is deactivated, the MSD enables any other sub-channel to take control of the master port. Sub-channels contend for the main channel by activating RTS, DCD, or by detecting data transitions.


 

Clock signals are provided by the modem connected to the master port, at data rates from 75 bps to 64 kbps (properly shielded, low capacitance cables must be used for speeds faster than 38.4 kbps) and faster. MSDs have optional anti-streaming features that prevent network lockups by automatically removing a defective sub-channel from service.

 

Any sub-channel can be temporarily taken off line for servicing by using the front panel enable/disable switches. The 3012/V24 comes with an internal power supply that can be set by a switch for 110-to-120 or 200-to-240 VAC operation.


 
Ordering Information


3012/V24: Powered RS-232 MSD, 2 V.24 DCE ports to 1 V.24 master DTE (100 - 120 VAC)
3012/V24-220: Powered RS-232 MSD, 2 V.24 DCE ports to 1 V.24 master DTE (200 - 220 VAC)
 

 

 
Specifications


Capacity: One to Eight RS-232 sync/async DTE devices; One RS-232 DCE master channel
Data format: Data is transparent at all data rates
Data rates: Up to 64 kbps (properly shielded, low capacitance cables must be used for speeds faster than 38.4 kbps)
Timing: External from master port, sub-channel 1 pin 24 routed to master port
Sub-channel interface: RS-232 (V.24) using female DB-25 connectors
Modem interface: RS-232 (V.24) using a female DB-25 connector
Terminal service modes: Scanning channels are continuously scanned for RTS on a sequential basis; Priority channels are continuously scanned for RTS, channel 1 has highest access priority
Anti-streaming: Automatic selectable time-out intervals
Power source: 100-120/200-240 VAC, 50/60 Hz, 0.16/0.08A, switch selectable
Operating temp.: 32 to 122 _F (0 to 50 _C)
Relative humidity: 5 to 90% non-condensing
Dimensions: 1.75H x 8.90W x 10.0D in.(4.44H x 22.60W x 25.40D cm)
Weight: 3012/V24: 2.25 lbs (1.02 Kg)
 

 

Patton Electronics Products

 

 

     

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