Originally Posted by spindoc
I can only guess, not actually being to observe what is happening and not experiencing this problem before. It's also been a while since I've dealt with DSL.
DSL is a signal that piggy backs on to your regular land line phone circuit. It can be affected by a lot of things. @doomer
, how did your land line phones work with the new modem attached. If they got crackly or buzzed, then the modem was definitely defective. Otherwise, my guess is that the modem is incompatible with the DSL circuit, though it could still be defective. How or why it would be incompatible, I could not tell you without some research on the circuit and the modem.
Here is the bottom line, though...
The best DSL circuit speed that AT&T offers is no better than 6 Mbps, the upload and download speed between the modem and the internet can not be better than 6 Mbps. The 300 Mbps is the speed of the router portion of the modem/router. It's the speed of the internal network in your home or business, the speed with which your devices communicate with the modem/router. @doomer
, your present modem/router should serve you fine, unless you plan on throwing a hundred devices on it or it is defective, itself.
Hope that helps.