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Table 3. Modularity Features and Benefits
Architectural Features Benefits
Cisco Services Performance Engine (SPE)
●
The Cisco 3900 Series offers field-replaceable SPEs.
●
These SPEs allow you to protect your initial investment in the Cisco 3900 platform for a longer
time period and scale router performance as your network and branch-office needs grow.
Cisco Services Module
●
A service-module slot replaces the network module and the extension module for voice and fax
(EVM) slots and is offered on Cisco 3900 Integrated Services Routers.
●
Each service-module slot offers high data-throughput capability:
Up to 4-Gbps aggregate toward the router processor
Up to 2-Gbps aggregate to other module slots over the MGF
●
Service-module slots are highly flexible, with support for doublewide service modules, which
are service modules that require two service-module slots. Doublewide service modules
provide flexibility for higher-density modules.
●
Service-module slots provide twice the power capabilities relative to the network-module slots,
allowing flexibility for higher-scale and better-performance modules.
●
An adapter module enables backward compatibility with existing network modules, enhanced
network modules (NMEs), and EVMs.
●
You can manage power to service-module slots by extensions similar to the Cisco EnergyWise
framework, so your organization can reduce energy consumption in your network infrastructure.
Full Cisco EnergyWise support will be available in future software releases.
Cisco Enhanced High Speed WAN Interface
Card (EHWIC)
●
The EHWIC slot replaces the high-speed WAN interface card (HWIC) slot and can natively
support HWICs, WAN interface cards (WICs), voice interface cards (VICs), and voice/WAN
interface cards (VWICs).
●
Three integrated EHWIC slots on the Cisco 3945E and Cisco 3925E or four integrated EHWIC
slots on the Cisco 3945 and Cisco 3925 allow for flexible configurations.
●
Each HWIC slot offers high-data-throughput capability:
Up to 1.6-Gbps aggregate toward the router processor
Up to 2-Gbps aggregate to other module slots over the MGF
●
Flexibility to support doublewide modules is enabled by combining two EHWIC slots. Up to 2
doublewide HWIC (HWIC-D) modules are supported.
Cisco Internal Services Module (ISM)
●
A single ISM slot provides flexibility to integrate intelligent services modules that do not require
interface connections in the Cisco 3945 and Cisco 3925.
●
Each ISM slot offers high-data-throughput capability:
Up to 4-Gbps aggregate toward the route processor
Up to 2-Gbps aggregate to other module slots over the MGF
●
The ISM replaces the AIM slot; existing AIM modules are not supported in the ISM slot.
●
You can manage power to ISM slots by extensions similar to the Cisco EnergyWise framework,
so your organization can reduce energy consumption in your network infrastructure. Full Cisco
EnergyWise support will be available in future software releases.
Cisco High-Density Packet Voice Digital
Signal Processor (DSP) Module (PVDM3)
slots on motherboard
●
PVDM3 slots natively support PVDM3 modules, providing support for richer density for rich-
media voice and video.
●
Each PVDM3 slot connects back to the system architecture through a 2-Gbps aggregate link
through the MGF.
●
Investment protection for PVDM2 modules is supported through an adapter module.
●
You can manage power to the PVDM slots by extensions similar to the Cisco EnergyWise
framework, so your organization can reduce energy consumption in your network infrastructure.
Full Cisco EnergyWise support will be available in future software releases.
