Cisco 3640 CISCO3640 3600 Series Modular Router Chassis 4-Slot No Modules

Cisco 3640 CISCO3640 3600 Series Modular Router Chassis 4-Slot No Modules

The Cisco 3640 is a four-slot modular access router from Cisco's 3600 Series platform. The chassis accepts Network Modules (NMs) and WAN Interface Cards (WICs) in any combination, allowing it to be configured for a wide range of WAN, LAN, and voice applications. This listing is for the bare chassis only — no plug-in modules are installed or included.

Specifications & What's Included

• Model: Cisco 3640 (CISCO3640)
• Series: Cisco 3600
• Module slots: 4 (slots 0–3), all empty
• Front-panel ports: RJ-45 CON (console) and RJ-45 AUX
• PCMCIA slots: 2 (slots 0 and 1) on front panel
• Slot indicators: ACTIVE and READY LEDs per slot (slots 0–3)
• System indicators: SYSTEM and RPS LEDs on front panel
• Rear: IEC AC inlet with integrated power switch
• Form factor: Rackmount, 2U
• Country of manufacture: U.S.A. (per regulatory label)
• Included: Chassis only — no modules, no cables, no rack ears observed

Applications

The Cisco 3600 Series was a widely deployed modular access router platform used throughout the late 1990s and 2000s in enterprise branch offices, Internet service providers, and enterprise WAN edge deployments. The 3640's four-slot chassis gave it more expansion capacity than the two-slot 3620, making it well suited for multi-service deployments combining T1/E1 WAN interfaces, Ethernet LAN modules, ISDN, Frame Relay, ATM, and Voice over IP cards in a single chassis. Today these units see continued use in CCNA/CCNP lab environments, legacy network support, and Cisco IOS training setups, where the modular architecture and broad IOS feature support remain valuable. The 3640 runs Cisco IOS and supports a wide range of NM and WIC modules available in the used market.