Air Force Files OTF Kernel Flight Plan
A telecom-equipment test activity of the US Air Force has a massive test load. Much of the equipment under test, and, therefore, the test equipment, is ISDN-based. In order to meet its test schedule, the Air Force decided that it needed a flexible way to connect any article under test with any piece of equipment in its test lab. It needed a special ISDN switch with some very special and configurable routing rules. Not only is there a need to support the existing huge installed base of ISDN equipment, but the move to IP-based systems is already underway, requiring that any system developed to support TDM to TDM connections today must soon support SIP-to-ISDN, and SIP-to-SIP, and do so using vendor-independent network-connectivity resources.
The answer? Commetrex’ Open Telecommunications Framework® Kernel Why OTF Kernel? Because OTF Kernel is the only open telephony middleware designed specifically to be resource independent, to support multiple applications with resource sharing, and provide basic PBX (port-to-port) switching capability.
OTF Kernel achieves its resource independence by isolating signaling, switching, routing, and media-processing resources, which are vendor specific, behind “resource service managers (RSMs). Since the RSMs use generic protocols to communicate with the system kernel, the applications are also resource independent.
For this system, Commetrex developed an RSM to support the Cantata NS301 Octal CompactPCI DS-1 interface board. Support for a higher-density (16 DS-1s) Dialogic board, followed by Commetrex’ standard SIP RSM, will follow.
The system’s call-routing application extracts the called number from the ISDN signaling and directs the call to the desired trunk route. A table is used to determine the appropriate routing algorithm. Operations include stripping or adding digits to the called number, number substitution, and the ability to statistically route calls.
Read more about OTF or email firstname.lastname@example.org.