Cisco 3900 series User Manual

1-17
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1 Overview of the Routers
Hardware Features
Hardware Features
This section describes the hardware features in Cisco 2900 series and Cisco 3900 series routers.
• Built-in Interface Ports, page 1-17
• Removable and Interchangeable Modules and Cards, page 1-18
• Packet Voice Data Modules, page 1-22
• Power Supplies, page 1-24
• Module and Router Power Consumption, page 1-25
• Fans, Ventilation, and Airflow, page 1-25
• Real-Time Clock, page 1-27
• Secure Key, page 1-28
• Cryptographic Accelerator, page 1-28
Built-in Interface Ports
Table 1-4 summarizes the interface ports built into the router chassis.
Gigabit Ethernet Ports
There are two different types of Gigabit Ethernet (GE) ports available on Cisco 2900 series and Cisco
3900 series ISRs.
Table 1-4 Summary of Cisco 2900 series and Cisco 3900 series Built-In Interfaces
Data Ports Management Ports
Router
Model
10/100/1000
GE RJ-45
10/100/1000
SFP USB Type A
Console Serial,
RJ-45
Console Serial,
Mini-USB
(Type B)
Auxiliary,
RJ-45
Cisco 2901 2 — 2 1 1 1
Cisco 2911 3 — 2 1 1 1
Cisco 2921 3 1 2 1 1 1
Cisco 2951 3 1 2 1 1 1
Cisco 3925 with SPE 100 3
1
1. One RJ-45 with 2 GE SFPs, or 3 RJ-45 GEs
221 1 1
Cisco 3945 with SPE 150 3
2
2. One RJ-45 with 2 GE SFPs, or 3 RJ-45 GEs
221 1 1
Cisco 3925E with SPE 200 4
3
3. Four RJ-45 or three RJ-45 with one GE-SFP, or two RJ-45 with two GE SFP
221 1 1
Cisco 3945E with SPE 250 4
4
4. Four RJ-45 or three RJ-45 with one GE-SFP, or two RJ-45 with two GE SFP
221 1 1

Cisco 3900 series Specifications

General

Brand	Cisco
Model	3900 series
Category	Network Router
Language	English