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Industrial Telephone Modems

Industrial Connectivity

These industrial telephone modems are specifically designed for industrial environments. They are rugged, reliable and have proven themselves over many years in the toughest applications.

Industrial%20Telephone%20Modems

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Industrial Telephone Modems will eliminate the difficulties encountered with installing office-grade modems in industrial settings. These ruggedized modems connect to any PLC, RTU or other industrial equipment that need to be remotely accessed. 

Industrial Modem Product Highlights
  • Reduce design time
  • Simplify installation
  • Increase reliability
  • Proven in the toughest settings from pipelines in Alberta to remote locations in Sweden
  • Compliant with telephone systems worldwide


To learn more about our VT-MODEM Industrial Telephone Modems, simply contact sales@sixnet.com or call +1 518 877 5173.

Field-Proven Performance

  • Auto dials on simple contact closure
  • Accepts VDC power directly
  • Does not need cumbersome wall mount transformer
  • DIN-rail or flat-panel mounting
  • UL508, UL1604 and DNV rated
  • Compliant with most international systems
  • Rated for industrial environments
  • Operates outdoors without a heater (-30°C)
  • Survives extreme heat (70°C)
  • Includes internal surge protection
  • Class I, Div. 2 (Zone 2) hazardous-location rated
  • Guaranteed long-term support
  • Designed to make jobs easier!

To learn more about our VT-MODEM Industrial Telephone Modems, simply contact sales@sixnet.com or call +1 518 877 5173.

Telephone Lines

  • Max. data rate 33.6 kbps for -1, -2, -3 and -4; 56 kbps for -5
  • Compatibility V.90, V.92 (-5 only); V.34, V.32 bis, V.32, V.22, V.22A/B, V.23, V.21, Bell 212A and 103
  • Data compression V.44; V.42 bis, MNP 5
  • Error correction V.42 MNP 2-4
  • Max. fax rate 14.4 kbps for -1, -2, -3 and -4; 33.6 kbps for -5
  • Fax capabilities V.17,V.29/V.27/V.21, FClass 1,1.0 (-1,-2,-3) V.34,V.17,V.29/V.27/V.21,FClass 1,1.0, 2, 2.0/2.1 (-4 and -5 only)
  • Ringer and jacks 0.3 and RJ11 (line and auxiliary)
RS232 Port
  • Max. RS232 Rate 57.6kbps for -2 and -3; 115.2 kbps for -1 and -4; 230 kbps for -5
  • RS232 (DCE) TD, RD, CTS, RTS, CD, DTR, DSR, RI, GND
  • Command Set standard AT and S register (see help)
  • Status LEDs CD, DTR, RD, TD, Power
PLC Discrete I/O Interface (VT-MODEM-2 Only)
  • “Trigger” Input: Starts auto-dialing when TRUE
  • Voltage range: 9 to 30 VDC (6.5 mA at 24 VDC)
  • Max OFF voltage: 5 VDC
  • “On-line” Output: is ON when connection exists
  • Output type: Sourcing — switches supply power
  • Output current:100 mA maximum
RS422 / RS485 Port (VT-MODEM-3 Only)
  • RS422 mode: Supports 4 wire full duplex
  • RS485 modes: 2 or 4 wire party-line operation
  • Signal rate: Standard rates up to 115.2 kbps
  • RS422/485: Up to 0.5 miles
General Characteristics
  • Input voltage 10-30 VDC for -1, -2, -4 and 5; 10-52 VDC for -3
  • Input current @ 24 VDC (typical)
  • 50 mA (Sleep mode 30 mA): -1,-2,-3 (Rev.3)
  • 75 mA (Sleep mode 50 mA): -4, -5
  • Operating Temp. -30° to 70°C (Storage: -40° to 85°C)
  • Humidity 5% to 95% RH (non-condensing)
  • Flammability UL 94V-0 materials
  • Telecom Ratings FCC part 68, Industry Canada CS03-8, CTR21 (98/482/EC); ACA TS 001; ACA TS 002
  • Electrical Safety UL 508, CSA C22.2/14; EN61010-1 (IEC1010), IEC 950, AS/NZS3260
  • EMI emissions FCC part15, ICES-003, Class A; EN55022; AS/NZS3548
  • EMC immunity EN50082-1 (IEC801-2, 3, 4)
  • Vibration IEC68-2-6
  • Hazardous locations (Zone 2) UL1604, CSA C22.2/213 (Class I, Div 2, Groups A, B, C, D); Cenelec, EN50021 (EEx nA II T4)
  • DIN-rail or panel mounting

To learn more about our VT-MODEM Industrial Telephone Modems, simply contact sales@sixnet.com or call +1 518 877 5173.

Part Number
 Description
VT-MODEM-1WW General Purpose 33.6K (V.34) Telephone Modem
VT-MODEM-2WW PLC Self-dialing Telephone Modem
VT-MODEM-3WW RS422 / RS485 & Extended Power Telephone Modem
VT-MODEM-4WW Leased-Line Telephone Modem
VT-MODEM-5WW Advanced 56K (V.92) Telephone Modem

Extended Warranty: Extend the warranty from 12 to 36 months: VT-CARE-36

Note: All industrial modems include a RS232 modem cable (DB9) and complete Windows software CD, at no extra cost.

Location Codes:
-US For use in U.S., Canada, Mexico, Central and South America
-EC For use in Europe, Asia, Africa, Australia and New Zealand
-WW For worldwide use.

To learn more about our VT-MODEM Industrial Telephone Modems, simply contact sales@sixnet.com or call +1 518 877 5173.

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