I am trying to install the 6.1.5 firmware on my IP phones, but it keeps coming back with "Upgrade Failed: No Response from SPA". I unzip the file to my desktop, run the exe and put in the IP address of the phone, but I keep getting the error.If you p...

I can make calls, but when the other person picks up, they can hear me but I can't hear them. I am connected to my Linksys WRT54G router and have Optimum Online as my internet connection. Is there any reason why this would be happening? I have tried ...