externals "tend" to run faster, the reasons may be them working under their own steam, but in my limited experience with modems, your connection is 100% dependant on your phone lines quietness..
now this seems to be a localized phenomenon, but in arkansas, you can request phone line conditioning... no one i have talked to outside arkansas seems able to acquire this vital service.. it in essence quiets the external buzz that is present in all phone lines..
you wanna test it in a rudimentary way, pick up the receiver and dial a single number... listen to the buzz in the phones receiver, more noise, less connection speed..
i managed to connect at 5.3 for over a year, when most fail to achieve 4.6, many at the 3.2 range..
i would suggest getting a service person to check the noise level in your lines.. and insist the address the issue..
BTW all my modems have been internal, and 5.3 is the maximum legal attainable limit one can expect in arkansas with this service..
5.3 on a 5.6 modem is considered optimal..
[addsig]