We have a TE121 for external communications withing our freepbx system. It has the hardware echo canceller. (Wildcard TE121 (VPMADT032))
All internal calls work perfectly. External calls are also working but remote speaker can hear a glitch each second.
Searching digium documentation for this issue we found this answer on the FAQ:
>>>>>>Why am I getting a clicking noise?
>>>>>>If a clicking noise is present when dialing through an FXO or when getting dialtone from an FXS, this is cause by echotraining. Turn it off to get rid of the clicking. The click is necessary for the echotraining.
As read in the forums, we tried to disable the echotraining (using include). The chan_dahdi is configured this way:
We also looked for system errors related to interrupts...etc. but everything seems to be ok. The voice and sound in fact is absolutely great. The problem is that glitch wich is very anoying igf there is a silence.
any hint about this??