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Cisco 3900 Series
Series Features Overview continuedSeries Features Overview
Cisco 3900 Series
The Cisco 3900 Series is architected to meet the application demands of today’s branch offices with design
flexibility for future applications. The modular architecture is designed to support increasing bandwidth
requirements, time-division multiplexing (TDM) interconnections, and fully integrated power distribution to
modules supporting 802.3af Power over Ethernet (PoE) and Cisco Enhanced PoE (ePoE). The table below
lists the architectural features and benefits of the Cisco 3900 Series.
Architectural Features Description
Optional Integrated
Redundant Power Supply
(RPS) and PoE Boost
• Both the Cisco 3925 and 3945 allow for power redundancy through
the use of an optional integrated redundant power supply, thereby
decreasing network downtime and protecting the network from power-
supply failures.
• When populated with dual integrated power supplies, the Cisco 3925
and 3945 can operate in a configurable PoE boost mode in lieu of
redundant power mode whereby the power capacity of the platform
is increased to almost twice the normal power to support additional
PoE ports.
Designed for Flexible
Deployments
• Both the Cisco 3925 and 3945 are designed for NEBS environments.
Architectural Features Description
Modular Platform
• The Cisco 3900 Series routers are highly modular platforms with several
types of module slots to add connectivity and services for varied branch-
office network requirements.
• The routers offer an industry-leading breadth of LAN and WAN
connectivity options through modules to accommodate field upgrades
to future technologies without requiring platform replacement.
• The Cisco Services Performance Engine (SPE) on the Cisco 3900
offers the ability to increase the performance of the router with a field-
upgradable motherboard as your network needs grow.
Processors
• The Cisco 3900 Series are powered by high-performance multi-core
processors that can support the growing demands of high-speed WAN
connections to the branch-office while also running multiple concurrent
services.
Embedded IP Security with
Security Sockets Layer
(IPsec/SSL) VPN Hardware
Acceleration
• Embedded hardware encryption acceleration is enhanced to provide
higher scalability, which, combined with an optional Cisco IOS Security
license, enables WAN link security and VPN services (both IPsec and
SSL acceleration).
• The onboard encryption hardware out-performs the advanced
integration modules (AIMs) of previous generations.
Multigigabit Fabric (MGF)
• The Cisco 3900 Series introduces an innovative multigigabit fabric
(MGF) that allows for efficient module-to-module communication,
enabling tighter services interactions across modules while reducing the
overhead on the router processor.
TDM Interconnectivity
Fabric
• Unified communications services in the branch office are significantly
enhanced with the use of TDM interconnectivity fabric in the router
architecture, allowing for scaling of DS-0 channel capacity.
Integrated Gigabit Ethernet
Ports
• The Cisco 3900 Series provides three 10/100/1000 Ethernet WAN ports.
• Two of the three 10/100/1000 Ethernet WAN ports on the Cisco 3900
Series can support Small Form-Factor Pluggable (SFP)-based
connectivity in lieu of RJ-45 ports enabling fiber connectivity.
Innovative Universal-
Serial-Bus (USB)-based
Console Access
• A new, innovative, mini-B USB console port supports management
connectivity when traditional serial ports are not available.
• Traditional console and auxiliary ports are also available.
Optional Integrated Power
Supply for Distribution
of PoE and Universal
DC Power Supply
• An optional upgrade to the internal power supply provides inline power
(802.3af-compliant PoE, Enhanced PoE, and Cisco Inline Power) to
optional integrated switch modules.
• On the Cisco 3925 and 3945 routers, an optional DC power supply will be
available in the future that extends possible deployment environments
such as central offices and industrial environments.