TC4-LP Secure Digital Voice & Messaging for the Icom IC-F8101 #61


The TC4-LP is an HF modem module with exceptional performance and reliability. The TC4-LP plugs into the Icom IC-F8101 #61 Transceiver’s internal provisioned connector. The TC4-LP installed in the IC-F8101 is suitable for governmental, paramilitary, industrial and commercial users requiring beyond line-of-sight (BLOS) secure digital voice and data messaging without fixed infrastructure.

RapidM’s EF-256 embedded functions for secure voice and data is hosted on the TC4-LP module. The internal Vocoder digitises the voice. The digital voice data is encrypted and converted to an in-band signal by the built-in high-performance modem. Built-in AES encryption means that all digital voice and data communications are secured by a trusted algorithm.

MessagePoint Software

MessagePoint is a Microsoft® Windows® application which connects to the TC4-LP data modem. The software allows users to easily communicate by using threaded chat messaging and file transfer from within the application.

Email is supported via the POP3 and SMTP interfaces. Users can compose emails using well-known email clients such as Microsoft® Outlook® and Lotus Notes™. MessagePoint ensures that emails get delivered to other users on the radio network.

Features and Benefits

  • Secure Digital Voice
  • AES-256 Encryption
  • Vocoder 600 – 2400 bps TWELP* or MELPe**
  • Email over HF Radio
  • Chat Messaging
  • File Transfer
  • Beyond Line-of-Sight (BLOS)
  • No Satellite Infrastructure Required
  • Free-to-Air (No Data Transfer Cost)
  • Data Compression Improves Throughput
  • Internal Modem Solution for Radio
  • Desktop and Mobile Deployment

* TWELP voice coding by DSP Innovations Inc.(www.dspini.com)
**MELPe for US customers only

Package Contents:

TC4-LP Module (Including EF-256)
MessagePoint Software
Installation Guide
Type-AB USB Cable

Not Included:

Icom IC-F8101 #61 HF Transceiver
Icom CS-F8101 #11 Cloning Software
Icom CFU-F8100 Cooling Fan Unit (Recommended)
Windows PC
Email Client (Such as MS Outlook™)

Contact us for pricing


  • Governmental and Security Communications
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