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UAV VoIP Gateway

UAV VoIP Gateway Software

Our VoIP Gateway enables UAV/UAS audio, video and radio communications using VoIP protocols

VOCAL’s UAV VoIP Gateway solution enables unmanned aerial vehicle audio, video and radio communications over IP networks using VoIP protocols.

  • UAV/UAS communications
  • Remote sensing and surveillance
  • Audio, video, radio and data relay
  • Low power/low bandwidth applications
  • Independent multi-channel devices
  • Full and half duplex radio communications
  • Secure communications
  • Proven VoIP interoperability
  • Optimized code for DSPs and ARM

VOCAL’s extensive telecommunications design and development experience and our comprehensive customization support will help you meet your UAV and UAS application requirements.  Customized interfaces for radio, device and sensor operational controls are also available.  Contact us for a demo or to discuss your specific UAV VoIP gateway application and performance requirements.


  • Multi-channel support for independent devices
  • Voice codecs include MELPe, G.711, G723.1, G.726, G.729AB, and iLBC vocoders
  • H.264 video resolutions from QCIF to 1080p60
  • Full-duplex and half-duplex radio communications
  • SIP, RTP and/or RTSP support for multiple VoIP providers
  • Encrypted communication using SRTP with SDES or proprietary key negotiation
  • Network stack with NAT/firewall support
  • High performance noise preprocessor
  • Quality of service configurable
  • WAN / WLAN support

UAV VoIP Gateway Software

VOCAL’s UAV VoIP gateway software solution is ideal for low power and low bandwidth communications and video surveillance applications used with unmanned aerial, ground and naval systems. The VoIP gateway provides a standards-based product with an extensive features list that can be configured for different payloads and missions.

UAV VoIP Gateway Software

Our standards-based VoIP gateway software can be configured for different UAV payloads and missions

The UAV VoIP Gateway converts between bi-directional or broadcast audio, video and radio applications and IP networks over a VoIP connection using SIP or RTSP.  Media streams are transmitted using RTP. The gateway accepts audio, video and radio communications from a wireless (or wired) network for output to the corresponding UAV on-board device.



Our UAV VoIP Gateway design can be used in numerous UAV/UAS applications, including:

  • Aerial surveillance and communications relay for search and rescue
  • Law enforcement
  • Tactical communications relay for a MANET connecting radio networks and other UAVs
  • Data collection and relay of remote SCADA systems used for security monitoring and environment management.

UAV Interoperability

VOCAL ensures UAV/UAS compatibility and interoperability testing using many VoIP providers. Our VoIP software works seamlessly with servers from Cisco, NetCentrex, Quintum, Asterisk, 3CX, OpenSIPS, FreeSwitch and other vendors.  Device configuration can be completely managed using a web interface.  For further information regarding compatibility and interoperability testing, please contact us.

UAV VoIP Gateway Search and Rescue

Our UAV VoIP gateway supports multiple devices for remote sensing, search & rescue, agriculture and other commercial applications

UAV Sensor Configurations

VOCAL’s UAV VoIP gateway can be configured with a variety of sensors for air, ground and naval unmanned vehicles for remote sensing, search & rescue, agriculture and other commercial applications.

Our VoIP solution supports radio and video devices typically used in unmanned aerial vehicle applications as well as other devices such as microphones, loudspeakers and even displays.

Specialized devices for remote sensing can also be supported using VoIP protocols to transmit sensor data.


VoIP Protocols

  • SIP
  • SDP
  • RTP
  • RTCP

Security Protocols

  • SRTP
  • SDES
  • SSLv3/TLSv1
  • IPsec


  • AES
  • DES
  • 3-DES
  • CCMP
  • RC4
  • SHA-1
  • RSA
Network Protocols

  • IPv4
  • ICMP
  • RARP
  • ARP
  • DNS
  • DHCP Client
  • NTP
  • SNTP
  • STUN
  • HTTP
  • FTP / TFTP
  • QoS

NAT/Firewall Support

  • Built-in Router
  • NAT Traversal
  • NAT Firewall
  • Port Forwarding
  • LAN Pass Through
  • PPPoE
Video Codecs

  • H.264 / MPEG-4

Voice Codecs

  • MELP / MELPe
  • G.711
  • G.722 / G.722.1 / G.722.2
  • G.729AB
  • Speex
  • SILK
  • OPUS
Voice Features

  • VAD / DTX / CNG
  • Packet Loss Concealment (PLC)
  • Adaptive Jitter Buffer
  • Audio Codec Preferences
  • Dynamic Payload Negotiation
  • Configurable Frames per Packet

Noise Preprocessor

  • Active Noise Cancellation
  • Frequency Domain Noise Reduction
VOCAL Technologies, Ltd.
520 Lee Entrance, Suite 202
Amherst New York 14228
Phone: +1-716-688-4675
Fax: +1-716-639-0713