The Data Connect MD202T

The Data MD202T is rackmount version of the Data Connect MIU202T. The same functionality that can be found in the MIU202T can be in the MD202T.

The Data Connect MD202T is a Bell 202T modem designed for asynchronous operation at 0 to 1200bps over voice grade lines and private lines and provides half-duplex communication on 2-wire lines, or full duplex on 4-wire lines.

The MD202T is comprised of MDMC carrier card and PE202T module. Up to 18 MD202T can be front loaded into an industrial grade 19” x 3U rack mountable chassis. The MDR Modem Bank is powered from wide range of AC or DC voltages. Two power supply cards can be installed to provide automatic back up in the event the primary power supply fails. The MDR will operate in temperatures from -20°C to +85°C and surge protected on both power and analog lines.

Two power supply slots are provided. Power supply cards available for any voltage in the range 9-150VDC and 9-275VAC. A single power supply card will power all 18 MD202T.

In addition to the MD202T the MDR Modem Bank also houses the MD28.8, MD14.4L, and MD9.6FPD.


  • 0-1200bps, Leased Line AC/DC Powered Bell 202T
  • 0-1200bps, over Voice Grade Leased Lines
  • Point-to-Point or Multipoint
  • IEC901-4 Surge Protection
  • -20°C to +85°C
  • For Meters, RTUs, SCADA, etc.


Data Rate:
Asynchronous 9-1200bps over voice grade leased lines or pilot wires

Bell 202T
Phase Coherent, Frequency Shift Keyed (FSK)

Full Duplex over 4-Wire Leased or Privates, Half Duplex over 2-Wire Leased or Private Lines, (Constant or Switched Carrier, DIP Switch Selectable)

Digital Port:
RS232 with DB9 Connector

Analog Port:

Surge Protection:
(Power Line): 8kV [Exceeds IEC801-4)

Surge Protection:
(Analog Line): 3.75kVAC

Operating Equipment:
-20°C to +85°C, 0 to 95% humidity (condensing)

Carrier Frequencies:
Bell 202T…

1200Hz ± 0.1%

2200Hz ± 0.1%

Line Independence:
600 ohms

Anti streaming:
45 seconds or more

Transmitter Output Level:
0 or 10dBm

Receive Sensitivity:
-33 or -43dBm

RTS/CTS Delay:
1, 12, 35, or 50 msec

Carrier Detect Delay:

Soft Carrier Turnoff:

Test Features:
Analog Loopback

Ordering Information

DCE/MD202T                            Bell 202T0-1200bps Rackmount 2/4Wire Leased Line & Multi-polling