Clockrate

If you have performance problem on Cisco 1721, Cisco 2610XM-2651XM, Cisco 2691, and Cisco 3660, with WIC-1DSL - IOS 12.3(2) or above, probably depends on the default value associated with ALL5 clockrate. If yuo wanna check type the following command on your router: hellroute01#show controller atm0/0 | include ATM0/0 Interface: ATM0/0, Hardware: DSLSAR (with Alcatel ADSL Module), State: up SCC0 = 2600000 (ATM0/0) SCC3 = 1000000 (ATM0/0) hellroute01# If you get 2600000 (default value) on SCC0 or SCC1 your downlink speed rate probably is limitated at about 300 KB/s ...