Industrial 56K modem

 RS-232 and RS-485 / Heavy-duty surge protection /
Supports DC power / Wide temperature range

Dial-Up Security on multiple levels of security with password verification
and security call back keeps your valuable data secure from intruders

now with improved data transmission and reception over
marginal and poor-quality telephone lines.

Industrial Rated 56Kbps dial up modem


    Worldwide Operation Support:
    - ITU-TV.92/V.34/V.32bis/V.32
    - V.22bis/V.22/V.23/V.23/V.21
    - Bell 212A/Bell 103
    - V29 FastPOS
    - V.22bis fast connect

    Data Compression:
    - V.44/V.42bis/MNP 2

    Error Correction:
    - V.42/MNP 2/MNP 4

    DTE/ Host Interface
    EIA RS-232 and RS-485

    Embedded AT command set Sixty-three embedded and upgradeable country profiles for
    worldwide homologation

    NVRAM for configuration and country profile storage

    Built-in remote diagnostics and configuration management

Optional mounting kits for DIN Rail
mounting or wall mount


Datasheet IG56.pdf
Datasheet IG56S.pdf

Heavy-duty surge protection
provided at power supply and
phone line interface


Supports wide range of AC & DC
power supply options - see ordering
part numbers

Supports DC power supplied from
DTE or DB-9 connector

Wide range of operating


The ARC DCE/IG56 high-speed V.92 dial-line modems are designed and manufactured for rugged industrial applications over the Public Switched Telephone Network (PSTN). The DCE/IG56 utillizes the industries latest V.92 modem technology to deliver outstanding features, performance, and reliability in one cost-effective solution.

The DCE/IG56 modem are ideally suited for industrial communication applications including SCADA systems,RTs, traffic monitor and control, and industrial automation networks. The DCE/IG56 supports RTUs equipped with an EIA RS-232 or RS-485 serial port. Data communications speeds up to 56 kbps in reception and up to 48 kbps in transmission are supported.
The modems incorporate the latest data-compression and error-correction standards for improved data transmission and reception over marginal and poor-quality telephone lines. Multiple levels of security with password verification and security call back keep your valuable data secure from intruders.

The DCE/IG56 modems are powered by a wide range of AC and DC power supply voltages. Its low power consumption and low stand-by current technology design makes the DCE/IG56 ideal for a battery-powered system as well as regular AC powered operations.



Data modem:
ITU-T V.92: Up to 56kbps receive & 48kbps transmit
V.34: Up to 33600 bps
V.32bis/V.32: Up to 14400 bps
V.22bis: Up to 2400 bps
V.21: 0-300 bps
Bell 212A: 1200 bps
Bell 103: 0-300 bps
Fax modem:
Send and receive fax up to 14.4 kbps
V17, V29, V27ter, and V21 channel 2
EIA/TIA 578 Class 1, T.31 Class 1.0, and Class 2

Data Format: Asynchronous, 7, 8 or 9 data bits, parity, 10- or 11-bit character with 1 or 2 stop bits

Fully compatible with ITU-T V.92/V.34/V.32bis/V.22bis/V.21 Bell 212A and Bell 103 compatible modes. Transmission Line Interface 2-wire full-duplex over PSTN
Connector: RJ-11C

DTE/RTU Interface
The modem provides serial ports to support RS-232 or RS-485 (selectable) interface standards: RS-232 Interface Connector: DB9-F Signals: RTS, CTS, CD, TD, RD, DTR, DSR, RI


RS-485 Interface
Connector: RJ-11C
Signals: 4-wire full-duplex or 2-wire half-duplex
TX+, TX-, RX+, RX-
Front Panel Indicators
LED. Indicators:

Power Supply Specifications
Three models support various power options:
Stand-alone: 90 264 VAC
Stand-alone: 100 400VDC
Stand-alone: 10 48 VDC
Power Consumption:
Idle mode: 65 mA@12V, 0.78 watts
Normal mode: 75 mA@12V, 0.9 watts, typical

Mechanical Specifications
Enclosure dimensions:
4.1(W) x 5.0(L) x 1.3 (H) 104mm(W) x 127mm(L) x 33mm(H) Weight: 0.5 pound, without AC power module

Environment Specifications
Operation: -40C to + 85C
Storage: -40C to + 85C
Up to 95 % non-condensing
Dry Contact Detection (optional) Two optical isolated dry contact detections are provided  for external devices (consult us for additional



modem comes with 9 pin DB9 to 25pin DB25 adaptor

  • IG56        Standalone, dial-up modem, with a 100-264VAC with external power module
  • IG56-LV Standalone, dial-up modem, for 10-60VDC power input
  • IG56-HV Standalone, dial-up with a 100-264VAC / 85-400VDC external power module power input
  • IG56-RM Rack mount card for the RM16M rack
    • IG56S        Standalone, dial-up security modem, with a 100-264VAC
                               external power module
    • IG56S-LV Standalone, dial-up security  modem, for 10-60VDC power input
    • IG56S-HV Standalone, dial-up security modem, with a 100-264VAC / 85-400VDC
                               external power module
      power input
    • IG56S-RM Rack mount card for the RM16M rack
  • EN2-KIT-WMB Wall-mount kit view Wall Mount Kit
  • EN2-KIT-DIN DIN-mount kit for view DIN Rail Mount Kit

     RM16M racks VAC and VDC power see spec pages


301-924-7400 EXT 25

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