Thanks MikeM. Another question, If I use Mfg and get the result as below, is it mean that my pstn port has problem or faulty? I can’t detect any call from my ISDN.
Digital Tenor Manufacturing Test starting (0xFFFFFFFF)…
Quintum:Smartcom> mmffgg ee
***** Digital Tenor Manufacturing Test Results *****
Pattern = 0xFF, Total Repetitions = 0.0
Total Errors: PSTN = 40, PBX = 0, DSP = 0