DIGITAL LINE LEVEL MEASUREMENT APPARATUS

PROBLEM TO BE SOLVED: To solve the problem that a transmitting/receiving level cannot be measured only by one level meter installed on a terminal side or on a station side because the transmitting and receiving signals are transmitted alternately in using an ISDN digital line and that when measuring the level on one side by supplying a constant sine wave signal from the other side, the digital pulse waveform cannot be measured in such a simple method. SOLUTION: The digital pulse waveforms can be measured by creating a receiving waveform measurement timing/transmitting measurement timing using a synchronous signal in unit of frame defined in TTC Standard JT-G961 flowing in the digital line. Therefore, a level meter easily measures transmitting and receiving levels by installing the level meter only on one side. COPYRIGHT: (C)2010,JPO&INPIT