Test arrangements for radio telephone systems
Test circuit arrangement for computer-controlled communications
Test device for telephone lines
Test interface adapter emulating no test trunk interface for non
Test interface adapter emulating on test trunk interface for non
Test message generator in a telecommunications network
Test of a call connection in an intelligent network by referring
Test set communication/interface system
Test set interface for automatically detecting line type
Test system and method for scheduling and running multiple...
Test telephone
Test trunk access controller
Test unit for interface between telephone company...
Test unit for use at a network interface device
Test unit for use at a network interface device
Testable echo cancelling method and device
Testing a subscriber terminal of a wireless telecommunications s
Testing an operational support system (OSS) of an incumbent...
Testing and complaint accepting communication unit
Testing apparatus for testing signaling of a switching system