The Cisco 7604 chassis accommodates a broad selection of line cards supporting numerous applications, including:

-SPAs and SIPs (Cisco 7600 Series SPA Interface Processor-200 [SIP-200], SIP-400, and SIP-600):
– Channelized T1/E1, Channelized T3, and Channelized OC-3/STM-1.
– OC-3/STM-1, OC-12/STM-4, OC-48/STM-16 Packet over SONET/SDH (PoS), and OC-192/STM-64 PoS.
– OC-3/STM-1 ATM, OC-12/STM-4 ATM, and OC-48/STM-16 ATM.
– Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet.
-Enhanced FlexWAN module: Supporting Cisco 7200 and 7500 WAN Port Adapters from DS-0 to OC-3 for channelized and ATM interfaces and also Fast Ethernet port adapters.
-High-density Ethernet services modules: 10/100 Mbps, Gigabit Ethernet, and 10 Gigabit Ethernet.
-Services modules: IP Security (IPsec), firewall, distributed denial of service, intrusion detection, network analysis, and content switching commonly used, for example, in the Cisco Mobile Exchange solution.
-Supervisor support: Cisco Catalyst 6500 Supervisor Engine 32 (WS-SUP32-GE-3B and WS-SUP32-10GE-3B), Cisco Catalyst 6500 Supervisor Engine 720 (WS-SUP720-3B and WS-SUP720-3BXL), and the new Cisco Route Switch Processor 720 (RSP720-3C and RSP720-3CXL).
The Cisco 7604 can be configured two ways: with a single supervisor engine and up to three line cards, or with dual supervisor engines and up to two line cards for high availability and redundancy. The Cisco 7604 also supports redundant 2700W (AC/DC) power supplies for increased availability. Understanding the need to use rack space efficiently, Cisco designed this router to be 8.75 inches tall (5 rack units [RUs]), with single-side connection management for both interface and power terminations. This setup allows placement of up to nine Cisco 7604 units per standard 7-foot rack.