Dial Up Modems

V.92/V.34/V.32bis Dial-Line Modems

Industrial Grade 56K/33.6K bps Dial-Up (PSTN) Modems

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The Synxcom SM9256D and SM9234D industrial grade modems are designed and manufactured for rugged communications over dial-up or public switched telephone networks (PSTN). The SM9256D and SM9234D utilize industry’s latest V.92 and V.34 modem technologies to deliver outstanding features, performance, and reliability in one cost-effective solution. The modems support RS-232 or RS-485 serial interfaces. The SM9256DX modem’s build-in optional micro-controller provides users with Synxcom’s proprietary security features to protest against unwanted access by unauthorized callers. DTEs with full RS-232, RS485, or just the 3-wire (TD, RD, GND) interface. The modem is ideal for industrial communication applications including SCADA systems, RTUs, traffic monitoring and control, and industrial automation networks.

Key Features:
  • Asynchronous operation from 300 to 115,200 bps.
  • ITU-T V.92/V.34/V.32bis/V.32/V.22bis/V.22/V.23/V.21 compatible
  • V.17/V.29 fax class 1/1.0 support
  • V.44/V.42bis/MNP5 data compression
  • V.42/MNP2-4 error correction
  • Operate over public switched telephone networks (PSTN) or POTS
  • Supports RS-232, RS-485 and RS-422 interface
  • Embedded and upgradable 63 country profiles with internal NVRAM
  • Build-in micro-controller to support 3-wire RS-232 interface over switched carrier or constant carrier
  • Isolated AC or DC-DC power supply for standard AC, battery, or solar powered systems
  • Build-in 6 LEDs and for local or remote diagnostics
  • Operate over wide range temperature of -40°C to +85°C
  • Small enclosure design for desk-top, DIN rail mounting or wall mount applications
Ordering Information Data Sheets (PDF): SM9256D, SM9256D-RM
SM9256D Standalone, V.92/V.34/V.32bis, up to 56K bps, 100-264VAC, 100-400VDC
SM9256D -DC Standalone, V.92/V.34/V.32bis, up to 56K bps, 10-60VDC (isolated)
SM9234D Standalone, V.34/V.32bis, up to 33.6K bps, 100-264VAC, 100-400VDC
SM9234D -DC Standalone, V.34/V32bis, up to 33.6K bps, 10-60VDC (isolated)
SM9256D -RM Rack mount card for RM16 nest, V.92/V.34/V.32bis
SM9234D -RM Rack mount card for RM16 nest, V.34/V.32bis
EN2-KIT-DIN DIN Rail Mounting Kit for standalone unit
EN2-KIT-WM Wall or panel mounting kit for standalone unit

Security Modem

Industrial Grade Modem for Secured Dial-up Applications

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The Synxcom SM9256DS and SM9234DS industrial grade security modems are designed and manufactured for secured communications over dial-up or public switched telephone networks (PSTN). The SM9256/SEC and SM9234/SEC utilize industry’s latest V.92 and V.34 modem technologies to deliver outstanding features, performance, and reliability in one cost-effective solution. The modems support RS-232 or RS-485 serial interfaces. The SM9256/SEC and SM9234D/SEC modems provide users with Synxcom’s proprietary powerful security features to protest against unwanted access by unauthorized callers. The modem is ideal for industrial and commercial communication applications including secured control systems, SCADA systems, corporate remote access servers, alarm systems, and critical network access.

Key Features:
  • Worldwide modem standard support: V92/V34/V32bis/V32/V22bis/V22/V21 compatible
  • Industry’s latest standard data compressions and error corrections
  • Asynchronous DTE operation from 300 to 115200 bps
  • Operate over POTS lines or PSTN voice-band networks
  • Selectable security features to protect against unwanted callers:
    • User ID and Password screening before access are granted
    • Call-back security after verification of caller’s user ID and password
    • Answer only to callers with registered I.D. within the secure modems
  • Provide network administrator to login locally or remotely to maintain user ID, password and call-back phone numbers, and to perform configuration changes
  • Isolated AC or DC-DC power supply for standard AC, battery, or solar powered systems
  • Build-in LEDs and push-button switch for local or remote diagnostics
  • Operate over wide range temperature of -40°C to +85°C
  • Supports RS-232, RS-485 and RS-422 interface
  • Small enclosure design for desk-top, DIN rail mounting or wall mount applications
  • Plug-in modules for Motorola/UDS modem racks in central site installations
Ordering Information Data Sheets (PDF): SM9256/SEC
SM9256/SEC Standalone, V92/V34/V32bis dial line modem 100-264VAC, 100-400VDC
SM9256/SEC-DC Standalone, V92/V34/V32bis dial line modem, 10-60VDC (isolated)
SM9234/SEC Standalone, V34/V32bis dial line modem 100-264VAC, 100-400VDC
SM9234/SEC-DC Standalone, V34/V32bis dial line modem, 10-60VDC (isolated)
SM9256/SEC-RM Rack mount card for RM16 nest, same as SM9256/SEC
SM9234/SEC-RM Rack mount card for RM16 nest, same as SM9234SEC
EN2-KIT-DIN DIN Rail Mounting Kit for standalone unit
EN2-KIT-WM Wall or panel mounting kit for standalone unit