D-Link DSL-2500U

D-Link DSL-2500U - series of ADSL modems and routers:
 * D-Link DSL-2500U A1
 * D-Link DSL-2500U/BRU/C C1
 * D-Link DSL-2500U/BRU/D D1
 * D-Link DSL-2500U/BRU/D D2
 * D-Link DSL-2500U/BRU/D D3
 * D-Link DSL-2500U/BRU/DB
 * D-Link DSL-2520U D3
 * CPU: Broadcom BCM6332KFBG
 * Flash: AT26DF161S

Firmware fo all these devices has telnet server.
 * In the telnet session you may write several scripts for tuning ADSL and PPPoE connections.
 * See Reconnect PPPoE on modem DSL-2500U (russian).

OpenWrt Wiki

 * http://openwrt.org/toh/d-link/dsl-2500u

Models
D-Link DSL-2320B DSL Modem D-Link DSL-2500U DSL Router D-Link DSL-2520U DSL Router D-Link DSL-2540B DSL Router D-Link DSL-2540U DSL Router D-Link DSL-2542B DSL Router D-Link DSL-2544N DSL Wireless Router D-Link DSL-2600U DSL Wireless Router D-Link DSL-2640B DSL Wireless Router D-Link DSL-2640BT DSL Wireless Router D-Link DSL-2640U DSL Wireless Router D-Link DSL-2642B DSL Wireless Router D-Link DSL-2650U DSL Wireless Router D-Link DSL-2680 DSL Wireless Router D-Link DSL-2730B DSL Wireless Router D-Link DSL-2730U DSL Wireless Router D-Link DSL-2740B DSL Wireless Router D-Link DSL-2740BR DSL Wireless Router D-Link DSL-2740U DSL Wireless Router D-Link DSL-2750B DSL Wireless Router D-Link DSL-2750U DSL Wireless Router D-Link DSL-2751 DSL Wireless Router D-Link DSL-2770L DSL Wireless Router D-Link DSL-2870B DSL Wireless Router D-Link DSL-2875AL DSL Wireless Router D-Link DSL-2877AL DSL Wireless Router D-Link DSL-2880AL DSL Wireless Router D-Link DSL-2890AL DSL Wireless Router D-Link DSL-2900AL DSL Wireless Router D-Link DSL-3580L DSL Wireless Router D-Link DSL-3590L DSL Wireless Router
 * http://www.speedguide.net/broadband-list.php?sort=model&cat=&brand=2&p=4

D-Link DSL-302G DSL Modem D-Link DSL-320B DSL Modem D-Link DSL-321B DSL Modem D-Link DSL-502T-GenII DSL Router D-Link DSL-504T DSL Router D-Link DSL-520B DSL Router D-Link DSL-526B DSL Router D-Link DSL-G604T DSL Wireless Router D-Link DSL-G624T DSL Wireless Router D-Link DSL-G664T DSL Wireless Router D-Link DSL-G804V DSL Wireless Router