Cisco 3900 Series Integrated Services Routers

The Cisco 3900 Series Integrated Services Routers offer the highest performance and services density among the ISR portfolio. The series comprises the Cisco 3945E, 3925E, 3945, and 3925 routers, which differ primarily in performance capabilities and service-module slot count.

The Cisco 3900 Series ISRs offer a field-replaceable Cisco Services Performance Engine (SPE), which hosts the system route processor, enhanced high-speed WAN interface card (EHWIC) slots, and onboard Ethernet and digital-signal-processor (DSP) slots, an option available uniquely on the Cisco 3900 Series. The SPE is a modular motherboard that you can upgrade with higher-performance engines that will be developed in the future. The Cisco 3945E ships with the Cisco Services Performance Engine (SPE250), the Cisco 3925E ships with the SPE200, the Cisco 3945 ships with the SPE150, and the Cisco 3925 ships with the SPE100. When ordering SPE spares or upgrading, it is important to note that the SPE250 and SPE150 are supported only on Cisco 3945 platforms, whereas the SPE200 and SPE100 are supported on the Cisco 3925 platforms.

Related Cisco Router Series

Cisco ISR 4000 Routers	Cisco ISR 1100 Routers
Cisco ASR 9000 Series Routers	Cisco ASR 1000 Router
Cisco 8000 Series Routers	Cisco Catalyst 8200 Series Edge Platforms	Cisco Catalyst 8300 Series Edge Platforms
Cisco ISR 1900 Routers	Cisco ISR 2900 Routers	Cisco ISR 3900 Routers