I have Tri-Band and I am using for more than a year. I have a parallel connection for Phone and Triband. Now When I connect the Splitter in my phone HISS sound come and when I disconnect the sound goes. I have a DSL-502T D-Link Router with Splitter. Is this a Splitter problem??? or something else. My ADSL link on router is not steady it comes and goes.... Pls help....