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1. Specifications

Removable and Interchangeable Modules

Table 2

capabilities. The network modules, extension voice modules, and interface cards fit into slots, located

on the front of the chassis on the Cisco 2801 router, and on the rear of the chassis on the Cisco 2811,

Cisco 2821, and Cisco 2851 routers; they can be removed and installed without opening the chassis.

Advanced integration modules (AIMs), expansion DRAM memory modules (DIMMs), and packet voice

data modules (PVDMs) plug into connectors inside the chassis; they can be removed and installed only

by opening the chassis.

Table 2

Summary of Cisco 2800 Series Removable and Interchangeable Modules

External Modules (In chassis slots)

Router Model

Network Modules

Cisco 2801

—

Cisco 2811

1 network module (NM) or

1 network module enhanced

(NME)

Cisco 2821

1 network module (NM) or

1 network module enhanced

(NME) or

1 network module enhanced

extended (NME-X)

Cisco 2851

1 network module (NM) or

1 network module enhanced

(NME) or

1 network module enhanced

extended (NME-X) or

1 network module

double-wide (NMD) or

1 network module enhanced

extended double-wide

(NME-XD)

1. Cisco 2800 series routers use PVDM II modules that are not compatible with Cisco 2600 series routers.

OL-5783-01

summarizes the optional modules that can be installed in the router to provide specific

High-Speed WAN

Interface Cards (HWICs)

2 single-wide (HWIC) or

2 double-wide (HWIC-D)

1 WIC/VWIC/VIC slot

1 VWIC/VIC (voice-only)

4 single-wide (HWIC) or

2 double-wide (HWIC-D)

4 single-wide (HWIC) or

2 double-wide (HWIC-D)

4 single-wide (HWIC) or

2 double-wide (HWIC-D)

Internal Modules

Extension Voice

Advanced

Modules

Integration

(EVMs)

Modules (AIMs)

—

Overview of Cisco 2800 Series Routers

Hardware Features

Packet Voice

Data Modules

(PVDMs)