I have a parallel line at my house. But I remove the phone from parallel line socket to access triband. Triband was working fine for the last 8 months. over the last few days the ADSL link light on the D-Link router is not working. I have checked the IP Address. hard reset the router. upgraded the firmware. also taken it to mtnl incidentally it works at mtnl. i got mtnl to reset the password. the router log keep saying "DSL Carrier is down". Could you help...