Iridium RUDICS is an enhanced data service that allows customers who have requirements for large data transfers the ability to transfer data via reliable, affordable, multi-protocol circuit switched data connectivity across the Iridium satellite network.

RUDICSRUDICS is an Iridium data service that allows customers to send and receive data traffic over the Iridium network using an optimized circuit switched data channel. It utilizes circuit switching technology via a dial-up modem and ISDN for low-bandwidth data transfer for Iridium data modems, enabling a host application to originate and terminate numerous connections simultaneously. This solution utilizes Network Access Servers to provide modem ports, supporting both Mobile-Originated (MO) and Mobile-Terminated (MT) Circuit Switch Data calls.

RUDICS is designed to be incorporated into an integrated data solution, taking advantage of the global nature of the Iridium communications system and combining that with a digital connection between the Iridium Gateway and a host application (SCADA/M2M, etc.). Integrated data solutions are applications such as remote asset monitoring, control, and data file transfer. Often these applications are designed to support hundreds or thousands of remote units.

RUDICS – How it Works

Remote applications use AT commands to control a circuit-switched, data-capable Iridium Subscriber Unit (ISU – data modem). The remote application dials a customer-specific Iridium number, assigned and provisioned by Iridium, which connects the call through a Siemens D900 switch to the RUDICS server. The ISU is authenticated using Calling Line Identification. Once authenticated, the call is routed over the terrestrial connection to a pre-configured Internet Protocol (IP) address and port at the host application server. The RUDICS equipment supports the following service types: TCP/IP encapsulation, PPP, and MLPP.

The host application can make a Mobile Terminated call by opening a Telnet session to the RUDICS server. Once this is authenticated, AT commands connect to the remote ISU and establish a circuit-switched data call. Connectivity between the Iridium gateway and the host application server can be via the Internet, the Internet with Virtual Private Network, Frame Relay, or a T1/E1 Leased Line.

RUDICS also offers capability for multi-link Point-to-Point Protocol (PPP), in which multiple ISU’s can send data simultaneously across an N x 2400 bps PPP connection.

RUDICS – Key Benefits


  • Only group members are allowed to connect
  • Device must call the special “group” number assigned for RUDICS customers or ISU-ISU circuit switched data
  • Reduces the need for username/password verification
  • The MSISDN of the calling unit is validated before access is granted


  • Faster Data Set-up Time
  • Approximately 25 to 30 seconds for ISU-PSTN
  • Approximately 9 to 13 seconds for RUDICS (end to end)


  • Most efficient circuit-switched data connection across the Iridium Network with quality, reliability and maximized data throughput
  • Eliminates analog modem training time, because it’s like placing a phone call
  • Lowers call costs


  • Protocol independent
  • No Operating System requirements
  • No TCP/IP requirements