Hi folks, I have nasty senerio, I have many analog lines. 3com(tc1000) Now some of them are behaving nasty. Once or twise user able to login properly in that line. Now in some lines I am geeting busy tone, evenif line is free(i.e no user loged in). Now I unplug that line from modem , and leave it in air, but still I got busy tone on that number, Than I pluged it in to phone-intrument(handset) and than also I got busy tone on that number. now i pickeup the receiver and check the dialtone.Dialtone was ok, after checking dial tone I was able to get ring on that number, and user is also able to login. The same trouble I faced in many lines in three-fine quards-modems. My telco people come and check earthing and all but seems everything ok. Any clue will help me out ?? Thanks pankaj