Transmission system, relay apparatus, transmission terminal, and transmission terminal control program

Test system for voice communications systems

Anti-looping for a multigateway multi-carrier network

Apparatus and method for testing and fault isolation in a communication network

Systems and methods for performing loop analysis based on un-calibrated single-ended line testing

Method and server/module for service configurations test

Method and system for performing SIP loopback in communication devices

Real time measurement of network delay

Method and apparatus for verifying signaling and bearer channels in a packet switched network

Providing applets to remote devices in a communications network

Apparatus and method for testing and fault isolation in a communication network