Series 6000 and
8000 MicroModems


Industrial Modems With Operating Temperature
-55°C to +100°C

Technical Data Sheet

Synchronous/Asynchronous/Isochronous/ Full duplex transmission/ Speeds up to 64 Kbps/ Distances to 15 km/Fully Transparent Operation/Commercial and Secure Applications.

VERSITRON's M6000 and M8000 series MicroModems provide reliable fiber optic data transmission and reception in a compact package. As interface extenders or modem links, MicroModems allow synchronous/asynchronous/isochronous full duplex transmission at speeds from 1 bps to 64 Kbps with fully transparent operation. These modems also support full handshaking signals.

Both the M6000 (RS-530, RS-422, RS-423, MIL-STD-188-114 Balanced) and the M8000 (RS-232 Standard and MIL-STD-188C) Series MicroModems operate in either source-timing or terminal-timing modes. In the source-timing mode, a clock and data resynchronization circuit eliminates loop delay and inverted clock signals.

All units are specified with a 20db link margin at a bit error rate of 10 to the minus 9th. Both series support the full set of control signals associated with RS-232 or RS-530 Standards. DCE and DTE copper interfaces with ST optical interfaces are available. There are two types of packaging:

  • Standard
  • EMI/RFI Suppressed

V.35 and RS-449 Standards may be configured with optional adapters and M6000 Series MicroModems.

GSA Info
More DataCom
MicroModem Application Diagram
Pinout Diagram
Chassis & Accessories
M6000 Model Numbers
M8000 Model Numbers
Download PDF

In addition to functioning as fully transparent fiber-optic data links, VERSITRON's MicroModems may also be used as multiplexers. Up to six asynchronous data streams may be accommodated by one MicroModem:

  • 2 high-speed signals on the clock and data lines
  • 4 low-speed signals on the control lines

Small enough to connect directly to data terminal and communications equipment, VERSITRON's MicroModems offer versatile solutions and complete transparency for data communications.

Benefits of fiber optics in communications systems:

  • Security
  • Greater Bandwidth
  • EMI/RFI Immunity
  • Greater Distances
  • Isolation
  • Low Signal Attenuation

VERSITRON Micro Modems offer a unique combination of advantages:

  • Fully Transparent Operation with independent data, clock, and control lines permits a wide range of application possibilities.
  • Extremely Small Size minimizes space requirements for desktop operation.
  • Electrical Isolation eliminates problems with ground potential differences and provides dielectric isolation.
  • Enhanced Versatility provides:
    * Null Modem
    (asynchronous or synchronous
    terminal-timing mode only):

    DCE to DCE or DTE to DTE.
    * Standards Conversion for:
    V.35, RS-232, RS-422,
    RS-423, RS-449, RS-530, MIL-STD-188C, MIL-STD-188-114 Balanced
  • Host Power for RS-232 and MIL-STD-188C interfaces using pin 9 eliminates the need for external power sources. The MicroModems are also powered by a separate AC "wall-brick" transformer (see Accessories List).
  • 19" Standard Rack Mount Chassis Model MRR-16 can hold up to 16 MicroModems using single or redundant power supplies.
  • Rugged, Extruded Aluminum Housings protect internal components from possible damage.
  • Full Service and Support from VERSITRON. Our technical service team will promptly respond to your inquiries to help keep your systems functioning as smoothly as possible. Technical Support is free and unlimited, and all VERSITRON products carry a lifetime warranty.

Link to view MicroModem Application Diagram

Superior Design For Superior Performance – For All Datacom Configurations

VERSITRON's MicroModems assure reliable data transmission, at distances up to 2 Km over multimode fiber-optic cable, 15 Km over singlemode.

Reliable data transmission is one of the key considerations in selecting a modem link. The ability to operate transparently – with minimal affect on transmitted and/or received data – is a major performance advantage of the VERSITRON MicroModems. To further assure accuracy in source timing applications, the clock and data are realigned in a unique source timing circuit. Even when translating from one serial data standard to another, minimal delay or no signal formatting effects are encountered.

VERSITRON's MicroModems meet current and future Datacom link requirements – minimizing future upgrade cost.

With their wide range of data rates, and ability to pass all control signals for the RS-232 and RS-530 Standards, the M6000 and M8000 MicroModem Series provide ideal Datacom links as system data rates increase, as additional control signals are required, or as low-speed data channels need to be added. Both MicroModem Series will accommodate these requirements without costly upgrades, modifications or replacement. Either Series can be used in a basic three-wire configuration, yet can accommodate a full 11-wire system with control line functions.

Link to view Pinout Diagram


Protocol: Asynchronous/isochronous/synchronous (source timed or terminal timed)
Data Rate: Continuously variable from 1 bps to 76.8 Kbps
Operation: Full duplex or simplex
Fiber Optic Interface:  
Connector: ST
Fiber Cables: 50/125, 62.5/125 or 100/ 140 mm multimode; 9/125 or 10/125 mm singlemode
Fiber Type: Multimode or singlemode
Link Margin: 20 db with 100/140 fiber-optic cable
15.5 db with 62.5/125 fiber-optic cable
10.8 db with 50/125 fiber-optic cable
Error Rate: Better than 10 to the minus 9th
MTBF: M6000 Series (Commercial or Tempest): 123,400 hours (14.08 years)
M8000 Series (Commercial or Tempest): 129,875 hours (14.82 years)
Digital Interface: M6000 – RS-422, RS-423, RS-530, MIL-STD-188-114 Balanced, V.35 or RS-449 with adapters
M8000 – RS-232, MIL-STD-188C
Electrical Interface: DB25F (DCE), DB25M (DTE)
Sample Rate: 300 KHz for clock and data; 18.75 KHz for control lines
Power Requirements: 5-15 VDC @ 300ma; M8000 Series may use host power on pin 9
Operating Temp.: -55° to +100°C (-67° to +212°F)
Relative Humidity: Up to 95% non-condensing
Altitude: UP to 10,000 feet
Dimensions: 1.0" wide (2.54cm) x 2.4" high (6.1cm) x 4.5" deep (11.4cm)
Weight: 6.75 oz. (0.19 kg)
MRR-16 Chassis:  
Dimensions: 19.0" wide (48.3cm) x 3.5" high (8.9cm) x 11.2" deep (28.4 cm)
Weight: 3.1 lb. (1.41 kg)


M8000 Series Model Numbers
M6000 Series Model Numbers


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