D-Link DSR-Series User Manual 2
Section 1 - Introduction
Tunneling Protocol (L2TP) to facilitate branch oce connectivity through encrypted virtual 
links. The DSR-150/150N, DSR-250/250N, DSR-500 and DSR-1000 support 10, 25, 35 and 100 
simultaneous IPsec VPN tunnels respectively. The DSR-500AC and DSR-1000AC support 35 and 
100 simultaneous IPsec VPN tunnels respectively.
•  Ecient D-Link Green Technology
  As a concerned member of the global community, D-Link is devoted to providing eco-friendly 
products. D-Link Green Wi-Fi and D-Link Green Ethernet save power and prevent waste. The 
D-Link Green WLAN scheduler reduces wireless power automatically during o-peak hours. 
Likewise the D-Link Green Ethernet program adjusts power usage based on the detected cable 
length and link status. In addition, compliance with RoHS (Restriction of Hazardous Substances) 
and WEEE (Waste Electrical and Electronic Equipment) directives make D-Link Green certied 
devices the environmentally responsible choice.