the cable to the air fairly well made however it is not because a cable is big it is necessarily good. I'm the NRA 600M (central France Telecom) I descended average rate of 40Mb / s. the use of this cable cost me 5Mb down and 1Mb stream flow amount is huge. I still wanted to know from where came the problem: so I boned (this cable see photos) the main problem I think just the fact that there is the presence of two twisted pairs (one would largely Simply, the second pair is not used and creates additional noise.) Secondly the double shielding (foil and metal son) saw that this shield is not grounded it creates an antenna effect that recovers all surrounding noise and interference. this cable must be used on the low-speed ADSL (cable RJ11 good is a non-shielded cable with a single twisted pair, shielded cables must be absolutely grounded, otherwise they will have an effect totally negative on your line. One last thing on the photo of the product on the site if you zoom in you will see that at the very core cable that is planned for analog telephony. secondly look at my photos on the origin of the cable is 24AWG CAT5: there has to be a concern.
