Chapter 1 Overview of Cisco 3700 Series Routers

Power Supply Options

Power Supply Options

Table 1-3lists the power supply options supported by Cisco 3700 series routers. Depending on the configuration specified when you placed your order, your router may not support all of these options.

Table 1-3

Power Supply Options for Cisco 3700 Series Routers

 

 

 

 

 

Power Supply Option

Cisco 3725

Cisco 3745

 

 

 

 

AC input power

 

Yes

Yes

 

 

 

DC input power

Yes

Yes

 

 

 

–48-V telephony power module to provide inline power to IP phones

Yes

Yes

 

 

 

Dual hot-swappable power supplies

No

Yes1

Compatible with Cisco Redundant Power System

Yes

Yes

 

 

 

 

1.Because of increased power consumption in high-temperature environments, a fully loaded Cisco 3745 router requires both power supplies when ambient temperature exceeds 104°F (40°C). Cisco 3745 routers operating under these conditions do not support the online replacement of power supplies.

Internal –48 V Telephony Power Modules

Cisco 3700 series routers provide inline power to IP phones connected to the router through Ethernet switch network modules. This power is supplied by special –48 V modules that connect directly to the chassis power supplies in Cisco 3725 and Cisco 3745 routers. A single –48 V power module meets the power needs of up to 36 IP phones. A Cisco 3745 router with two –48 V power modules installed provides redundant power for up to 36 IP phones. Figure 1-5and Figure 1-6show the –48 -V power modules as they appear when installed in Cisco 3700 series routers.

Cisco 3700 Series Routers Hardware Installation Guide

 

OL-2180-08

1-9

 

 

 

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Cisco Systems 3700 Series manual Power Supply Options, Internal -48 V Telephony Power Modules, Power Supply Option Cisco
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3700 Series specifications

Cisco Systems 3700 Series routers are a pivotal part of Cisco's portfolio, designed for medium to large enterprises aiming to deliver secure and efficient networking capabilities. Introduced as a versatile solution, these routers provide a comprehensive blend of performance, scalability, and investment protection.

One of the standout features of the Cisco 3700 Series is its modular architecture, allowing organizations to customize their router according to specific needs. This modularity supports various modules for different functions, including voice, data, and video, making the 3700 Series an ideal choice for converged networking environments. Administrators can enhance functionality through an array of WAN and voice interface cards that adapt as the organization's needs evolve.

The 3700 Series is built on Cisco's IOS (Internetwork Operating System), ensuring robust and high-quality performance. It supports advanced routing protocols including EIGRP, OSPF, and BGP, facilitating efficient data transmission across diverse environments. This versatility helps organizations implement sophisticated multi-site connectivity and enables reliable performance in complex network scenarios.

Security is a paramount concern in modern networking, and the Cisco 3700 Series delivers with features such as integrated firewall services, VPN support, and intrusion detection capabilities. These security measures protect sensitive data and ensure secure communication between remote sites—critical in today’s cyber landscape.

Another key characteristic of the 3700 Series is its support for Quality of Service (QoS), which prioritizes time-sensitive traffic such as voice and video. By ensuring that critical applications receive the bandwidth they require, organizations can maintain the quality of service that their users expect.

Moreover, the Cisco 3700 Series is designed with redundancy in mind. Features like dual power supplies and hot-swappable fan trays enhance reliability and uptime, which are crucial for mission-critical applications.

Furthermore, energy efficiency is an increasingly important consideration in network design. The Cisco 3700 Series adheres to modern energy standards, helping reduce the overall carbon footprint while supporting high-performance capabilities.

In summary, the Cisco Systems 3700 Series routers stand out for their modularity, advanced routing capabilities, robust security features, and energy efficiency, making them an optimal choice for enterprises that not only need performance but also flexibility and reliability in their networking solutions. As businesses continue to evolve and adapt, the Cisco 3700 Series is a dependable partner in their connectivity journey, ensuring they can meet current demands while preparing for future challenges.
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