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UDS Motorola 202T FSK Modem
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UDS Motorola 202T
Frequency Shift Keyed (FSK) modem
  • The Motorola UDS 202T modem features built-in diagnostic and anti-streaming capabilities. The anti-streaming capability prevents a modem from remaining in the transmit mode when the modem is not actively transmitting data. The diagnostic features allow the user to verify transmitted and received data. The specific features are:

  • 2-wire half duplex or 4-wire full duplex private lineoperation

  • 0 to1200 bps data rate over unconditioned lines and 1,800 over high quality lines

  • Anti Streaming

  • Phase coherent, frequency shift keyed (FSK) modulation

  • LED indicators

  • Front panel rotary switch function selector

  • Integral test features

    The Universal Data Systems 202T is a Frequency Shift Keyed (FSK) modem which is designed for asynchronous operation at 0 to 1800 bps with C2 line conditioning, or 0 to 1200 bps asynchronous operation on unconditioned lines. The modem provides half duplex communications on 2 wire private lines or full duplex communications on 4 wire private lines, and is ideal for use in multipoint networks.

    The 202T is a single printed circuit card enclosed in a new compact size housing. The unit features an integral anti-streaming protection option which prevents network Tie-ups by incorporating a delay timer that will disconnect a modem, if it remains in transmit mode longer than a selectable period of time. The 202T also features strap options for Request to-Send/Clear to Send Delay timing, Transmit Carrier, local Copy Squelch, Turnaround squelch, Soft Carrier Turn Off, Carrier Detect Level, Carrier Detect Delay, and Test Generator Baud Rate Select. These strap options allow the user greater control of the modem, for his individual application.

    The 202T standalone modem is designed to be interchangeable between the Universal Data Shelf multiple modem enclosure and the stand alone modem enclosure. By removing the modem card and attaching the optional front panel, the modem can be directly inserted into the Universal Data Shelf. With this feature, a data-communications facility can be easily upgrade front multiple standalone enclosures to a centralized rack without the expense and trouble of purchasing new modems.

    Additionally a single 202T may be mounted in a standard 19" equipment rack via the UDS models RM16M Model 1 through model 29.

    Attention: Our representatives speak only English or Spanish if you can't speak English please send us an email with your requests and we can translate and respond in your language.

    We are located in Gilbert (Phoenix Area) Arizona, 85233 USA and ship Worldwide!


Technical Specifications

Data Rate: 0 to 1200bps asynchronous over unconditioned  lines

Operation: Full duplex over 4 wire private lines or half  duplex over 2-wire private lines

Modulation: Phase coherent, frequency shift keyed (FSK)

Carrier Frequencies: Mark: 1200 Hz Space: 2200 Hz

Line Impedance: 600 ohms 10% transformer coupled and transient protected

Transmitter Output Level: Selectable from 0, to -12
dbm in 2 dbm steps

Clear to Send Delay: 8.3 ms, 33.2 ms, 59.9 ms, or 219.6 ms (selectable)

Carrier Detect Delay: 6 ms or 23 ms

Digital Interface: EIA RS-232 (DB-25 female) and CCI1l V.24

Teleco Interface: RJ45 female

Turnaround Squelch: 0 ms, 8.3 ms, or 159.6 ms

Anti Streaming: 4, 7.6, 14, 28, 56, none (selectable)

Soft Carrier Turnoff: 0 ms, 8.3 ms, or 26.6 ms

Environmental: 0 to 50° C; 95% humidity, noncondensing          

Mechanical: Width: 7"; Height 2.25"; Depth: 9.60"; Weight  3.0 Lbs.

AC Power Requirement:115 VAC single phase,  47 to 63 Hz @ 10 watts maximum

DC Power Requirements: 12 to 60 VDC

Certification: FCC Rules, Part 15 certified, CSA certified, DOC certified

CS (Clear to Send): ON when the CS line is high (ON)

CD (Carrier Detect): ON when a carrier is detected by the modem receiver.

RD (Receive Data): On when data is received, decoded, and furnished to the terminal equipment. RD is also ON when the receive cats line goes into a space condition, OFF in a mark condition.

TD (Transmit Data): Responds in the same manner as the RD LED, but only when data to be "transmitted" is furnished to the modem. However, the LED may be on when the DTE is disconnected.

TM (Test mode): Active when Test switch is in any test mode. The indicate' will blink OFF/ON when errors occur in Self Test mode

POWER: ON when power is applied


Ordering Information

UDS Motorola 202T
   Model #  Description
62025197 Stand Alone MOT202T   
62025209 Rack Card MOT202T     
62025266 DC Powered MOT202T   


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National Data Mux Inc
506 E Juanita Avenue, Suite # 8
Mesa Arizona 85204USA

480-588-9240 Local & International
480-926-0007 Fax Local & International
800-663-1141 Toll Free (USA ONLY)

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