TransNexus Releases Open Source Software for VoIP Routing

Share Article

New open source module enables any route server to support SIP or H.323 networks using GKTMP protocol.

TransNexus, Inc. has released its Gatekeeper Transaction Message Protocol (GKTMP) module as open source software under the free BSD (Berkeley Software Distribution) license. The Cisco GKTMP is Cisco’s highly flexible Gatekeeper Transaction Message Protocol which defines an open interface between an external route server and Cisco’s H.323 gatekeeper or Cisco’s SIP proxy. The new open source GKTMP module provides an open interface to the TransNexus commercial route server with profit optimizing features such as least cost routing, quality of service routing, automated credit controls and secure access control based on digital certificates and public key infrastructure (PKI) services.

The new GKTMP module, available at, is written in C and has been tested extensively on Linux and Sun Solaris operating systems. The module may be used with open source peering servers such as the OpenOSP or RAMS servers, available from, to create a reliable and feature rich peering server for Cisco VoIP networks.

About TransNexus

TransNexus has been an innovator of commercial and open source VoIP Operations and Billing Support Systems (OSS/BSS) since 1997. Deployment of the TransNexus OSS/BSS solution provides wholesale VoIP carriers with an immediate increase in operational profits. Key features include Least Cost Routing, Quality of Service Routing, secure inter-domain peering, traffic analysis and control, new revenues from wholesale services, and lower cost back-office operations.

Contact: Alcina DeFigueiredo


Share article on social media or email:

View article via:

Pdf Print

Contact Author

Alcina de Figureido
Visit website