Cisco CISCO876-K9 | 870 Series 876 4 x Ports 10/100Base-TX LAN + 1 x Port ADSL WAN Integrated Services Router

1. WAN Interface: ADSL over POTS (Annex A)
2. LAN Interface: 4-port 10/100BASE-T Fast Ethernet switch
3. Firewall: Stateful Inspection Firewall
4. VPN: IP Security (IPsec) VPN support
5. NAT: Network Address Translation (NAT) support
6. QoS: Quality of Service (QoS) support
7. Routing Protocols: Static, Routing Information Protocol (RIP) v1 and v2, and Inter-VLAN Routing (IVR)
8. Maximum Concurrent Sessions: 10,000
9. Maximum IPSec VPN Tunnels: 10
10. Maximum VLANs: 5
11. Memory: 64 MB DRAM and 20 MB flash
12. Dimensions (H x W x D): 1.73 x 12.8 x 9.8 inches

Notes:
1. The Cisco 876-K9 is a versatile and reliable router that provides secure and high-speed connectivity for small businesses.
2. With support for ADSL over POTS and IPsec VPN, the router is ideal for remote workers and branch offices.
3. The router's stateful inspection firewall and QoS features ensure that network traffic is secure and prioritized for optimal performance.