671 E. Brokaw Road

San Jose CA 95112



New Product

*NEW* Modem Module w/ Ethernet option

*NEW* 5G / 2.4GHz USB Wi-Fi Module

*NEW* TinyLAN Serial/USB to Ethernet module

*NEW* Wi-Fi/Ethernet to 8 port Modem Server

*NEW* Wireless AI camera Sensor EVK

*NEW* AI MIPI Camera Module

*NEW* Wi-Fi Wireless Cables

*NEW* Wi-Fi Universal AP Modules

*NEW* Wi-Fi/Ethernet/BLE Gateway

*NEW* BLE Sensor Gateway

*NEW* Ethernet/Wi-Fi/BLE to Modem Adapter

Embedded Wi-Fi to Serial module
    temperature range -40 to +105C

Embedded Wi-Fi AP/router adapter


Ethernet Products

All in One Wi-Fi/Ethernet Station

Medical MOPP Ethernet Switch

USB to Ethernet Adapters -

- IEC 60601-1 Certified MOOP/MOPP

- 3.0 to 2.5G bps

- 3.0 to Gigabit Ethernet

- 2.0 to 100M bps

Ethernet/Wi-Fi/USB/Serial Converter

Ethernet to Serial / Modem Adapter

Ethernet to Analog Modem Adapter


Wireless Modems

Wi-Fi Cables -

- RJ-45/DB9

Wi-Fi Modems -




- PCIe Wi-Fi

- PCIe (M2) Wi-Fi

Bluetooth Modems -

- BT4.2

- BT5.1 *NEW*

- BT5.3 *NEW*

3G Cellular Modems

2.4GHz Transceiver

GPS Module


PSTN, Dial-Up Modems

By Interfaces -

- Ethernet

- Serial TTL, Internal

- RS232, Internal, 12/24/48V

- RS232, Standalone

- USB, Internal

- USB, Standalone

- PC/104

- ISA Bus


By Applications -

- Medical Modems

- Smart Phone FAX Modem

- Contact ID Modems

- Leased-Line Modems

- Bell 202 Compatible

- Speakerphone Modems


PC/104 Products

PC/104 Modem

PC/104 3G Cellular

PC/104 Wi-Fi

PC/104 Ethernet


Custom Specifications

Build-to-Suit, Wired or Wireless


Embedded Dial Up Modems for Alarm Systems and Medical Applications


Size: 1.0" x 1.0" x 0.25" (H)

SIA Protocol & Ademco Contact ID Support

IEC60601-1 (Medical) Complaint

56K bps Data, Fax, Voice

3KV Isolation

-40C to +85C Operating Temperature


These small and versatile modems are specifically designed to meet the stringent requirements for industries including Medical Services, Business & Home Security, Remote Monitoring & Data Collection and more.

These controller based modem modules support Ademco's DTMF Contact ID protocol published by SIA (Security Industry Association).  Utilizing standard DTMF tones and selected AT Commands, the HM4-RC family may be provisioned to transmit event and emergency signals to almost any monitoring station.  The HM4-RC can detect "Kiss-off" tones and then restore the telephone line for standard voice communications.

The HM4-RC family also complies with IEC60601-1 with 3KV breakdowns.  The telco and medical certifications are transferable to the integrator to allow easy integration to almost any platform.

Measuring only 1.0" x 1.0" x 0.25", the modem has a built-in data pump, controller and on-board International DAA.  Ready to operate with simple AT commands, the family will function on any OS (operating system).  Its cost-saving line-in-use feature eliminates the need for maintaining a dedicated phone line in many applications.

The modem provides 300 bps to 56k bps data rates and up to 14.4k bps fax operation.  The flexible family may be provisioned for Telephone Answering Machine capabilities with on line voice playback, recording, and DTMF tone detection and generation.  Other features include Caller ID, Modem-on-Hold, Caller waiting detection, Data/Fax/Voice call discrimination, Quick connect, and Extension pickup detection.  Modem customization is available through patch code that can be stored in modems on board memory.


  • Controller-based, no external memory required

  • Independent of all operating systems

  • Ademco DTMF alarm protocol support

  • SIA FSK alarm protocol support

  • 3.3V VCC with Serial TTL Interface (I/O signals are 5V tolerant)

  • 3KV Isolation

  • Telephony / TAM Voice Modes (V.253)

  • DTMF tone detection and generation

  • V.92 data rates from 300 bps to 56K bps

  • V.92 Quick Connect, Modem-on-Hold, PCM Upstream

  • V.29 Fast POS and V.22bis Fast Connect

  • Bell 212A, and Bell 103 Standards

  • Error Correction: V.42/MNP2-4

  • Data Compression: V.44/V.42bis/MNP5

  • Flow Control: Software and Hardware

  • Fax: V.17, V.29 Class 1/1.0 and Class 2

  • Call waiting detection

  • Type I and Type II Caller ID detection

  • Automatic Auto Answer

  • Storable AT commands

  • Low power consumption mode

  • 63 embedded and upgradeable country profiles

  • Line in use and extension pick-up detection

  • Remote hang-up detection

  • Built in NVRAM for adding customized firmware code

  • RoHS compliance

  •  Agency approvals: (All transferable to integrator where applicable)

    • FCC68 (US), CS03 (Canada) and CTR21 (EU) certifications

    • IEC60950-1

    • IEC60601-1 (Medical) compliant

    • CE Marking

Default Countries Support: Supports 63 different Country Codes and many other Country Code groups.  Contact Radicom Research, Inc. for more information.


  • Business & Home Security Alarm Systems

  • Medical Devices

  • Industrial Monitoring Systems

  • POS Terminals

  • Gaming, Vending Machines

  • Remote Monitoring & Data Collection

  • Back-Up Communication Systems

Ratings @ 25o C






Tip / Ring Current Continuous 10 20 120 mA
Dielectric Withstanding Voltage     3000 VRMS
Operating Temperature -40   +85 C
Relative Humidity (non-condensing) 10   95 %
Voltage Requirement 3.15 3.3 3.45 VDC
       - Power Consumption 208 245 270 mW
       - Current Consumption
66 74 78 mA
Sleep Mode Current Consumption 11 11.4 12 mA
Transmit & Receive Level -10 -20 -43 dBm

Ordering Information

Model Number

Data Rate Fax Voice

Dimensions & Configuration

Serial TTL
56k bps 14.4k bps Efax support Yes 1" x 1" x 0.3" (H) module only
Serial TTL
3.3 - 5VDC
56k bps 14.4k bps Efax support Yes 1" x 2.5" x 0.42" pin compatible to Socketmodem
RS232 Serial
7 - 48VDC
56k bps 14.4k bps Efax support Yes 2.2" x 2.5" x 0.66" with DB9 and RJ-11 connectors installed
RS232 Serial
56k bps 14.4k bps Efax support Yes 2.2" x 2.5" x 0.66" with DB9 and RJ-11 connectors installed
RS232 Serial
56k bps 14.4k bps Efax support No 4" x 6" x 0.88", accessories including one RS232 cable with DB25 connectors, DB25-to-DB9 converter, RJ-11 cable, and one 120V or 230V input power adapter.
56k bps 14.4k bps Efax support Yes 1" x 2.5" x 0.75" with USB type B and RJ-11 connectors installed
56k bps 14.4k bps Efax support Yes 1.4" x 2.5" x 1.0" External Contact-ID USB modem with RJ-11 and USB cables

Mechanical Diagram & Pin Assignments - V92HM4-RC Family




  1. Pin spacing is 0.100" from center to center

  2. Dimension of the modem without enclosure - 1.00" x 1.00" x 0.25"

  3. Pin 8 and pin 14 are not provided

  4. Square pins - 0.025" x 0.025"

  5. *DSR - Tied to GND through a 30-ohm resistor.  Use to terminate DSR signal if necessary

  6. Suggested mating female connectors:

    Through Hole:

    a. Samtec P/N. #SSW-108-21-G-S (RoHS)

    b. Molex P/N. #90147-1208 (non-RoHS)


    a. Samtec P/N. #SSW-108-22-G-S-VS (RoHS)


Information furnished by Radicom Research is believed to be accurate and reliable.  However Radicom Research assumes no responsibility for its use, or any infringement of patents or other rights of third parties which may result from its use.  Radicom Research reserves the right to change circuitry at any time without notice.  This document is subject to change without notice.

The information contained herein is subject to change without notice. Logos, trademarks and copyrights are property of their respective owners.

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