Transportation System Solutions

vehicle, wayside, stations and airports



Arcturus system solutions help equipment manufacturers meet the specialized requirements of devices in transportation systems including:

  • Wayside, passenger and driver communications
  • Two-way voice, digital intercoms, passenger assistance alarms
  • Station stop or informational announcements and sequencing
  • System wide and zone paging
  • Multichannel Radio-Over-IP (RoIP) convergence
  • Full integration options for central operation and system wide management

With Arcturus it is possible to create multi-modal audio devices that address NEMA recommendations for audio intelligibility while providing tools to help ensure proper operation over wide-area wireless network systems. Arcturus system solutions are currently deployed by top metro rail vehicle manufacturers.



Solutions include installation-ready hardware platforms, bundled with specialized middleware packages suitable for virtually any application in transportation that requires multi-modal voice communication over metro-wide or wireless networks. Voice solutions offer co-existence and failover modes to maintain independent operation regardless of broader network or server availability. Control solutions support direct operation via physical interface or by a protocol-based device virtualization service, capable of remote operation by vehicle computer or central station. Deep supervision and intelligibility tools can detect and adapt to network failures, compensate for varying noise levels and can even perform self-tests to identify degraded audio intelligibility.

A range of tools are available to address; intelligibility, mobile device integration, centralized operation, device management, installation and maintenance.

  • Industry leading digital voice, intercom and PA-paging support
  • Audio intelligibility tools, tests and reporting
  • Tools for central operation, control and management
  • External device connectivity for supervision and operation
  • Infrastructure availability detection, reporting and failover
  • Mobile apps for installation and maintenance
  • Third party device integration including IP video
  • Full customization, support and integration options

System Diagram

(mouse over image to magnify)


(mouse over image to magnify)

View full size


Telephony Features
  • Full duplex SIP / RTP based VoIP
  • Fully automatic or supervised intercom modes
  • G.711a, G.711u, G.726, G.729, G.721, G.722 wide band
  • AEC/Dedicated Hardware AEC
  • Primary and failover server support
  • Full peer-to-peer coexistence
Prerecorded Announcements
  • Built-in framework for file play and sequencing
  • Support for call progress message announcements
  • Native format voCoder transcoding tool
  • Uploadable (dynamic) audio files
Mass Notification and Paging
  • Fully automatic or supervised multicast paging receiver
  • Standalone Multicast paging broadcaster
  • Automatic SIP paging rebroadcaster mode
  • 99 unique paging groups per multicast address
  • Extensible muticast addresses and ports
  • Dynamic and ad-hoc page group creation
  • Built in auto-disconnect, reconnect
  • Last-in in wins arbitration
  • Built in facilities for priorities, alert tones
  • Firmware management framework
  • Remote firmware upgrades
  • Firmware failover framework
  • Definable serial port and boot parameters
  • Low-level device recovery
Reporting and Supervision
  • Remote logging of system activities
  • Active network failure detection
  • Event and alarm reporting
  • Loss of server detection, reporting and failover
  • Analog component acoustic quality testing and reporting
  • Call quality detection, reporting and countermeasures
  • Full watchdog subsystem with application protection
  • Hardware watchdog
WebUI Module
  • Web user interface for configuration
  • SSL v2 and v3 cryptography support (HTTPS)
  • Login authentication
  • Auto log out and deny simultaneous users
Remote Provisioning
  • Automatic file-based remote management
  • HTTPS transport with SSL cryptography
  • Compatible with standard webserver
  • Simple script configuration file
  • Configurable with unique authentication credentials
  • Post-parsed compatibility with dynamic webservers
Discovery and Association
  • MDNS device and service discovery
  • Broadcasts unique device credentials and configurable names
  • Firmware service names and mode
  • Compatible with any BonjourTMenabled web browser
  • Compatible with device virtualiztion and mobile tools
Other Services
  • DHCP, NTP, DNS, ARP, Telnet
  • Basic voice response tool for setup
  • Persistent objects and factory settings
  • TFTP device recovery
Remote Operation
  • I/O control interface
  • Dedicated signals for supervision via PLC or I/O block
  • Dedicated signals for stand alone operation using dry contacts
  • Device virtualization for remote operation via network
External Device Connectivity
  • I/O Interface for dry contact controls
  • Optional peripheral interfaces for sensors
  • Optional IEEE1588 physical layer time synchronization


Intelligibility Tools
  • Automatic ambient noise detection and compensation
  • Tests for acoustic performance of analog components
  • Quality monitoring of network, voice data, latency, loss
  • Countermeasures for server availability and low quality
  • Framework for prerecorded announcements
Centralized Operation Tools
  • Virtualization service for remote operation and supervision
  • Integration with external devices including IP cameras
  • Support for Windows®, Mac®, Linux®
Centralized Administration Tools
  • System wide firmware management and administration
  • Centralized file based remote provisioning
  • Complete web GUI available from central tools
  • Support for Windows, Mac, Linux
Mobile Device Integration
  • Virtualization service for remote operation and supervision
  • Installer and troubleshooting solutions
  • Integration with external devices including IP cameras
  • Support for iPhone®, iPad®, Android®
Additional Packages and Options
  • Middleware SDK, APIs and Frameworks
  • A rich portfolio of IP building blocks
  • Advanced audio processing algorithms and tools
  • Full suite of services, support and customization options

Related Standards

  • NEMA SB50 Emergency Communications / Audio Intelligibility Applications Guide