Russell -

Thank you for the kind words.

I have done it all - two modems (Moto & Linksys), two different routers (D-Link & ASUS (Tomato & DD-WRT)), three ATA's (PAP2, PAP2T, HT502), & three different phone systems including hard-wired. I've tested every conceivable configuration of these devices. The only thing I haven't tried is changing ISP's .

I wish you luck.

Ken