Compact Cisco 881 Ethernet Security Router delivers a 4‑port fast Ethernet switch, one WAN port, 512 MB RAM, 256 MB flash, and USB 1.1 for firmware. It supports G.711–G.729ab codecs, AES‑256, IPSEC, SSL/TLS, WEP/WPA2, and is managed via SNMPv3, SSH, CLI, and HTTP. This black device operates from sea level to 4570 m altitude in up to 95% humidity.