I have a phone off the same wall plug as my homehub router.  This phone has significant background hash whereas all other phones in the house are crystal clear.

I have changed phones, leads, ADSL filters but no improvement.   I just happened to be chatting on that phone today while rebooting my homehub as and soon as the router went off-line the phone went clear, but when the router was back on line, back came the hash.

Any ideas?

Cheers

Darryn