RC8X4 Quad ARQ Server & IP Controller – 32 kbps

The RC8X4 Quad ARQ Server & IP Controller is a purpose-built stand-alone hardware platform housing four independent Automatic Repeat reQuest (ARQ) and Vocoder functions used in maritime and strategic long-range (BLOS) communications systems.

The RC8X4 unit has high commonality with the RC8 and is intended for strategic and maritime data communications where space, size, weight, power and cost are at a premium. The RMCX4 can be installed as both land and ship-borne 19-inch rack equipment occupying only a single 1U slot.

In conjunction with the RM8 or RM8X4 Software-Defined Modems (SDMs) and external link encryptors, the RC8X4 provides robust, secure voice, data and position communication capability over HF links even in severely degraded channel conditions. This fully integrated, qualified system ensures optimal performance and functionality and offers peace-of-mind stemming from RapidM’s commitment to long-term product availability and support.

Services include voice, position transfer, email, messaging, ACP 127 chat and IP data transfer.


In its most basic configuration the RC8X4 provides four ‘IP-to-sync’ data converter functions. The RC8X4 is capable of hosting four STANAG 5066 ARQ servers for error-free data transfer. The STANAG 5066 IP and COSS Clients are embedded in the RC8X4. Alternatively the RC8X4 can host STANAG 4538 proxies for secure data transfer using the STANAG 4538 xDL modes provided in the RM8 or RM8X4 SDMs. Additionally the RC8X4 can host RapidM’s RTAWC a state-of-the-art low-rate Vocoder designed expressly for HF channel conditions.

The RC8X4 can be used in fixed frequency or multi-frequency networks. For the latter, ALE 2G or 3G (Fast Link Setup) channel access functions are utilised for link establishment and link maintenance.

Data and Voice Interfaces

The RC8X4 features serial and Ethernet interfaces for data and external GPS and two audio interfaces per function. Various external RapidM or third-party clients can bind with the 5066 servers or the 4538 proxies using the RAW SIS protocol thus allowing multiple applications concurrent access to the ‘radio line’ – ARQ server/encryptor (COMSEC)/modem/transceiver.


Features and Benefits

  • Designed for Redundancy – 4 PSUs
  • Quad (4) Functions – 1U 19-Inch Rack Slot.
  • Deployment – Ship-Borne and Shore Station
  • Software-Defined Functions – S/W Options
  • Front Panel Set-Up/Control – Menu-driven
  • Companion Products – RM8 and RM8X4
  • Long-Term Product Availability – 20 Years
  • IP-to-Sync Converter Functions
  • Embedded – STANAG 5066 ARQ Servers, JITC certified, Edition 3-Compliant
  • Embedded – IP and COSS Clients
  • Embedded – STANAG 4538 Proxies *
  • Embedded – RTAWC low-rate Vocoders*
  • Email, Chat and Messaging – Via SIS Protocol
  • Deployment – Ship-Borne and Shore Station
  • Operation – Point-to-Point and Broadcast
  • Data Modems – SSB, ISB and WBHF
  • ALE – 2G and 3G with ALM
  • Menu-Driven Control and Configuration
  • Management LAN – 1 to 4 Interfaces
  • Data Ports – 4 Synchronous DCE Interfaces
  • Data LAN – 4 Data Interfaces for IP Traffic
  • Aux Audio I/F – 4 Interfaces for Voice
  • Asynchronous Serial Ports – For ACP-127
  • Support for External Encryption – COMSEC
  • Factory Presets – Lower Integration Effort

* Note: Future option

Contact us for pricing


Product Family

RC Family

Product Accessories

This product does not currently have any associated accessories.