Cisco - ADSL - Determine Attenuation & Distance From Exchange

Use the "show dsl interface atm0/0" command on Cisco routers to get the attenuation figure for your router. The column you are interested in is the one under ATU-R, which is the 'Remote' end. The column for ATU-C is the Central Office. DS is for downstream and US is for upstream. Apparently you can divide your attenuation figure by 13.81 to get an approximate distance from the exchange. Further down, you can verify the speed of the line in boh the downstream and upstream direction.

More information on this command can be found here: 1-Port ADSL WAN Interface Card  [Cisco IOS Software Releases 12.1 Special and Early Deployments] - Cisco Systems