ADSL Annex B/Ethernet Router with Built-in Switch
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Affordable solution for high-speed connectivity for your home or small office 
DSL-2540U provides all the essentials for a safe, high-speed wireless network: ADSL/ADSL2/ADSL2+ standards, Fast Ethernet standard, built-in firewall, QoS engine, and numerous additional features.
DSL-2540U is equipped with a built-in firewall. Advanced security features minimize threats of hackers, prevent intrusions to your network and block access to unwanted websites for users of your local network.
ADSL port and 4-port switch
ADSL router is equipped with a port for connecting to ADSL line and 4 Ethernet ports to connect workstations. Due to this feature DSL-2540U is a cost effective solution for wired networks without the need to install a separate switch. In addition, any Ethernet port of the device can be used to connect to a private Ethernet line.
Configuration and management
You can configure and manage the DSL-2540U settings via the user-friendly web-based interface (the interface is available in several languages).

General features

• ADSL: 1 RJ-11 port 
• LAN: 4 RJ-45 10/100BASE-TX Fast Ethernet ports with auto MDI/MDIX
ADSL standards
• ADSL: ANSI T1.413-1998 Issue 2; ITU-T G.992.1 (G.dmt) Annex B, ITU-T G.992.2 (G.lite) Annex B 
• ADSL2: ITU-T G.992.3 Annex B 
• ADSL2+: ITU-T G.992.5 Annex B
WAN connection types
• ADSL: PPPoE, PPPoA, IPoA, Static IP, Dynamic IP, Bridge 
• Ethernet: PPPoE, Static IP, Dynamic IP, Bridge
ATM/PPP protocols
• Bridged and routed Ethernet encapsulation
• VC/LLC-based multiplexing
• ATM Forum UNI3.1/4.0 PVC (up to 8 PVC) 
• ATM Adaptation Layer Type 5 (AAL5) 
• ITU-T I.610 OAM F4/F5 loopback 
• ATM QoS 
• PPP over ATM (RFC 2364) 
• PPP over Ethernet (PPPoE) 
• Keep-alive for PPP connections
Network protocols and functions
• Static IP routing
• NAT 
• DHCP server/client/relay 
• DNS relay 
• Dynamic DNS (DDNS) 
• UPnP 
• VLAN support 
• IGMP proxy
Firewall and access control
• NAT аirewall 
• Stateful Packet Inspection (SPI) 
• URL аilter 
• Packet filtering (IP/ICMP/TCP/UDP) 
• Virtual servers 
• Prevention of DoS attacks 
• Intrusion detection and event logging 
• DMZ 
• Port Triggering
• Interface grouping 
• 3 priority queues
Configuration and management
• Multilingual web-based interface for configuration and management
• Access via TELNET 
• Firmware update via web-based interface
• Saving/restoring configuration to/from file
• Support of remote logging 
• Automatic synchronization of system time with NTP server

• Power 
• Status 
• LAN 1-4 
• DSL 
• Internet
Power supply
• External power adapter 12VDC/0.5A 
• ON/OFF power switch 
• RESET button to restore factory default settings


Order info

DSL-2540U (ANNEX B)  ADSL Annex B/Ethernet Router with Built-in Switch


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