I have this problem when there is lot of noise in phone line when modem is turned on, it clears when modem is turned off.
It all started few days ago when the line went dead and when the live was revived it had this problem accompanied with frequent disconnects. I hooked the phone cord directly in modem but it didn't work. Noise margins are below acceptable level.
PTCL guys are not able to sort out the issue, any idea?