* New Mailing Address *
671 E. Brokaw Road
San Jose CA 95112
(After August 23rd 2018)



New Product

*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 +105°C

Embedded Wi-Fi AP/router adapter


Ethernet Products

All in One Wi-Fi/Ethernet Station

Medical MOPP Ethernet Switch

Serial to Ethernet Module

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 -

- 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


2400 bps FastPOS-Connect, Half-InchModem™

- 240HM-T-W-NE (Standard)

- 240HM-RC (RoHS Complaint)


The 2400 bps Half-InchModem™ measures only 1.0” x 1.0” x 0.3”.  This feature-rich miniature module is fully self-contained including built-in data pump, modem controller and on-board International DAA. The complete solution provides system engineers the flexibility to include modem functionality in system products with minimal engineering resources.

With Radicom’s proprietary code, the modem provides the fastest possible dial-up connections for Point of Sales (POS) operation.  Using two 240HM family modems, point to point, allows independent POS operation without having to use a central site modem or existing software controlled billing systems.

Standard features of the modem include data rates from 300 BPS to 2400 BPS, V.22 bis and V.22 fast connect, Caller ID and low power sleep mode. The modem also provides enhanced features such as Line-in-Use detection, Call waiting detection, Remote hang-up and Extension pick-up detection. The modem has built in Digital Line Guard (DLG) protection which can detect an over current situation on Tip and Ring. Used to protect the modem when accidentally connected to a digital telephone system.

The modem is ideal for POS Terminals, Set-Top Boxes, ATM Machines and other embedded applications which require fast-connect speeds, low power consumption and cost-effective data communications.


  • -40°C to +85°C operating temperature

  • 1.0” W x 1.0” D x 0.30” H

  • Serial TTL Interface

  • ITU-T V.22 bis, 2400bps data rate

  • Enhanced AT Command Set

  • 300 bps to 2400 bps operation

  • Fast-connect speed

  • DTMF tone dialing generation

  • V.42, MNP2-4 error correction

  • Single 3.3V supply

  • Sleep Mode support

  • Low power consumption

  • Caller ID Line-in use detection

  • Extension pick-up detection

  • Digital Line Guard (DLG) protection

  • 64 country codes supported

  • Agency approvals:

  • Transferable FCC68, CS03 and CTR21 certifications

  • EN55022B, EN55024 compliant

  • c/UL 60950-1 Recognized Component

  • IEC60950-1, EN60950-1, EN60601-1 (Medical Electronics) compliant

  • CE Marking


  • Set Top Boxes

  • Point-of-Sales Terminals

  • ATM Machine

  • Remote Monitoring and Data Collection Systems

  • Vending Machines

Ratings @ 25o C






Tip / Ring Current Continuous 10 20 120 mA
Dielectric Withstanding Voltage     1500 VRMS
Operating Temperature -40   +85 °C
Relative Humidity (non-condensing) 10   95 %
Voltage Requirement 3.00 3.30 3.60 VDC
       - Power Consumption 180 215 255 mW
       - Current Consumption
60 65 71 mA
Sleep Mode Current Consumption 16 18 19 mA
Transmit & Receive Level -10 -20 -43 dBm

Mechanical Diagram & Pin Assignments - 240HM Family


  1. Pin spacing is 0.100" from center to center.

  2. Dimension of the modem without enclosure - 1.00" x 1.00" x 0.30"

  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.

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


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