The Cisco 3825 Integrated Services Router is part of the Cisco 3800 Integrated Services Router Series which complements the Integrated Services Router Portfolio. The Cisco 3825 Integrated Services Router provides the following support:

• Wire-speed performance for concurrent services such as security and voice , and advanced services at up to half T3/E3 rates
• Enhanced investment protection through increased performance and modularity * Enhanced investment protection through increased modularity
• Increased density through High-Speed WAN Interface Card Slots (four)
• Enhanced Network Module Slot * Support for over 90 existing and new modules
• Support for majority of existing AIMs, NMs, WICs, VWICs, and VICs
• Integrated GE ports with copper and fiber support
• Optional Layer 2 switching support with Power over Ethernet (PoE) (as an option) , supports the 36-port Cisco EtherSwitch module (NMD-36ESW)

Security

• On-board encryption
• Support of up to 2000 VPN tunnels with the AIM-EPII-PLUS Module
• Antivirus defense support through Network Admission Control (NAC) o Intrusion Prevention as well as stateful Cisco IOS Firewall support and many more essential security features

Voice

• Analog and digital voice call support
• Optional voice mail support
• Optional support for Cisco CallManager Express for local call processing in stand alone business for up to 168 IP Phones
• Optional support for Survivable Remote Site Telephony support for local call processing in small enterprise branch offices for up to 336 IP phones