Description DOCSIS-compliant, the modem is already DOCSICS 1.0certified for Ethernet and is software upgradable to DOCSIS 1.1. Layer 2 bridging functionality means you can share your cable service among up to 16 computers on a LAN and define filters for top performance Built-in 56-bit encryption and protocol filtering capabilities, as well as stack-ability with 3Com OfficeConnect Internet firewalls, protect data security. Support for multiple classes of service, including Committed Information Rate, lets you standardize on this modem for the services you want Designed to support Internet telephony (VoIP), integrated firewall, virtual private network (VPN), and other advanced features.