DCB 202T 4-wire
Private Line Modem
The 202T modem operates at 0 to1200 bps
asynchronous, with FSK modulation. It uses the latest DSP modem circuitry to
insure excellent performance and future availability.
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- Full duplex to 1200 bps
- Asynchronous RS-232
- 4-wire, full duplex line application
- 900 Hz soft carrier turn off
- Anti-streaming
- Standalone or rack mount
- High stability transmit and receive frequency
- Ruggedized for full temperature range
- Quiet multi-layer board
- Fully compatible with other 202T's
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- Full duplex to 1200 bps
- Asynchronous RS-232
- 4-wire, full duplex line application
- 900 Hz soft carrier turn off
- Anti-streaming
- Standalone or rack mount
- High stability transmit and receive frequency
- Ruggedized for full temperature range
- Quiet multi-layer board
- Fully compatible with other 202T's
The 202T modem operates at 0 to1200 bps asynchronous, with FSK modulation. It
uses the latest DSP modem circuitry to insure excellent performance and future
availability. It has 900 hz soft carrier turn off for multidrop and an
anti-streaming option. 7.25" half card size, standalone and custom OEM
board configurations are available. The pc card version uses the internal PC ISA
bus only for power from the pc bus. The PC card fits into a 20 slot rack mount
chassis that is only 7" high. The phone line connector is an RJ-11 for
4-wire leased line operation. Transmit is on positions 2 and 3, receive 1 and 4
of the 4 position RJ-11connector. The modem has a push/push switch for local
digital loop on or off. The loopback switch is located on the rear of the unit,
next to the DB-25 terminal connector.
Modem
- Analog full duplex, 4-wire, 600 ohm balanced, Frequency Shift Keying:
- Mark-1200 hertz, Space-2200 hertz, Speed 0 to 1200 bps
- 900 Hertz Soft Carrier Turn Off for multidrop operation
- Transmit level control 0 dBm or -16 dBm
- Will drive up to 30 Km of cable depending upon wire gauge
- Switched carrier or constant carrier operation (RTS forced on or terminal
controlled)
Digital Interface
- RS-232, DB-25S
- Signals are Tx, Rx, RTS, CTS, DSR, DCD
- RTS/CTS delay is 12 or 20 ms in switched carrier mode or RTS can be forced
on
- Rx data is clamped to mark when no receive carrier detect is present.
- 202T Modem - FSK Analog Modem, Async
- Power, Tx Data, Rx Data, RTS, CTS, DCD, Test
- Digital loop via rear panel switch and front DIP switch
- Controlled carrier (with RTS/CTS delay) or constant carrier with RTS/CTS
on
- Anit-streaming option (8 seconds), Loopback or normal operation
- Transmit level - 0 db or -16db, 900 Hz Soft Carrier turn off On or Off
- -35C to +70C operating temperature range, PC ISA bus format or standalone
version,
- PC bus for power and ground only, standalone unit uses 110V wall mount
supply
- Half size PC card, 7.25"D x 4.25"H
- Stand alone: 5.5" W x 7.375"D x 1.5" high, 110VAC wall
mount supply (9VDC, 500 ma)
- Other DC power supply voltages, 12, 24, -48, 125 VDC, available on special
order
- A 1.5" x 19" fixture available to rackmount up to 3 standalones
in a single 1U height
- 20 slot rack chassis on slide guides is 19"W x 16"D x 7"H,
110VAC 250 W power supply
OPTION SWITCH SETTINGS
Switch DOWN UP
1 - Reset Toggle Up/Down
2 - Anti-streaming Off On
3 - RTS/CTS delay 12 ms 20 ms
4 - RTS control Forced on Controlled by Terminal
5 - Soft Carrier Turnoff Off On
6 - Reserved - -
7 - Transmit Level -16 dB 0 dB
6 - Loopback Off On
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| Standalone rack fixture - 18.95" x 1.5" high |
Single Unit Rack Mounts |
How to Order
Part #
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| 202T-SA
| 202T Modem - Standalone
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| 202T-R
| 202T Modem - Rackmount
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| 20S Rack
| 20 Slot Rack w/ power supply
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| 1U Rack
| Rack mount 1 unit wide
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| 1U Rack-3
| Rack mount 3 units wide |
DCB Products