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Patton Electronics 3018/V24
Powered, V.24, RS-232, Modem-Sharing Device
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Patton Model 3018 /V24
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Powered, V.24, RS-232, Modem-Sharing Device
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Now up to eight sync or async devices can share one modem in a polled or
contention environment.
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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 (MSD-8C is rack mountable)
- Internal power supply; switch selectable for 110- or 220-VAC
- UL, CSA, and FCC Class A approvals
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Overview |
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The Model 3018/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 Model 3018/V24 comes with an internal power supply that can be set by
a switch for 110-to-120 or 200-to-240 VAC operation. |
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3018/V24 |
Powered
RS-232 MSD, 8 V.24 DCE ports to 1 V.24 master DTE (MSD-8C) |
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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
Op. temp.: 32 to 122°F (0 to 50°C)
Rel. humidity: 5 to 90% non-condensing
Dimensions: 1.75H x 17.0W x 11.0D in. (4.44H x 43.18W x 18.93D cm)
Weight: 3018/V24: 4.5 lbs (2.1 Kg)
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Patton Electronics Products
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