Thanks Teodor and MikeM:
Its sad I will have to turn off some of my ports.
Is there available surge protector on the market to protect the remaining lines? Can you give some brand?
Have someone returned their units to quintum with this defect? How much will the repair cost be?
Also, i have found something. After disabling the channel, and do a test o again on that port, sometime it response “dial tone detected” this is weird!
Thanks for replying