Thomson SpeedTouch 585 v5
8. Faceplate Splitter
ADSL routers are normally supplied with an ADSL microfilter ("dangling filter") for each active telephone socket in the house. It is frequently mentioned in the Thinkbroadband forums that performance can be improved by installing a faceplate splitter on the master socket, in which case no other filters are required. I tried this and it made an enormous difference.
Installing a Pressac faceplate splitter and using high quality cables (Belkin High-Speed Internet Modem Cable) from socket to UPS (for data line surge protection) and UPS to ST585 increased the sustainable ADSL synchronisation speed from ca. 3.7 Mbps to ca. 5.4 Mbps - not bad for a line BT said could not support fixed 2 Mbps. This changed the IP Profile (BT IPStream BRAS data rate) from 3 Mbps to 4.5 Mbps, a 50% increase in effective download speed.