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Removing the Cover from Cisco 2821 and Cisco 2851 Routers

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Removing the Chassis Cover Removing the Cover from Cisco 2821 and Cisco 2851 Routers Follow these steps to remove the chassis cover. A number 2 Phillips screwdriver is required. Rack-mounted routers must be removed from the rack and positioned on a flat surface before you start removing the cover. The following warning applies only if the router is provided with a DC-power input: Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003 Step 1 Make sure that the router is turned off and disconnected from its power source. Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network voltages. Statement 1041 Step 2 Step 3 Step 4 Step 5 Disconnect all network interface cables from the rear panel of the router. Place the router on a flat surface. Use a Phillips screwdriver to remove the three screws at the rear of the top cover. Set the screws aside in a safe place. Lift the cover up to a 45-degree angle. (See Figure 7.) Slide the cover to the side (toward the side with the fans) until the tabs are free from the slots. (See Figure 7.) OL-5792-04 Installing and Upgrading Internal Modules in Cisco 2800 Series Routers 7

Section	Page
Objectives	1
Audience	2
Topics Covered by Hardware Documents	2
Conventions	3
Safety Warnings	4
Warning Definition	4
Related Documentation	9
Cisco 90-Day Limited Hardware Warranty Terms	10
Obtaining Documentation	11
Cisco.com	12
Ordering Documentation	12
Documentation Feedback	12
Obtaining Technical Assistance	12
Cisco Technical Support Website	13
Submitting a Service Request	13
Definitions of Service Request Severity	13
Obtaining Additional Publications and Information	14
Overview of Cisco 2800 Series Routers	17
Hardware Features	18
Product Serial Number Location	18
Cisco Product Identification Tool	20
Built-in Interfaces	20
Removable and Interchangeable Modules	21
Memory	22
Power	23
LED Indicators	23
Chassis Ventilation	26
Real-Time Clock	26
Chassis Views	26
Cisco 2801 Chassis	26
Cisco 2811 Chassis	28
Cisco 2821 and Cisco 2851 Chassis	30
Interface Numbering	32
Specifications	34
Regulatory Compliance	41
Preinstallation Requirements and Planning for Cisco 2800 Series Routers	43
Safety Recommendations	43
Safety with Electricity	44
Preventing Electrostatic Discharge Damage	45
General Site Requirements	45
Power Supply Considerations	45
Site Environment	46
Site Configuration	47
Equipment Racks	47
Installation Checklist	48
Creating a Site Log	49
Inspecting the Router	49
Required Tools and Equipment for Installation and Maintenance	50
Port and Cable Information for Cisco2800 Series Routers	53
Console and Auxiliary Port Considerations	53
Console Port Connections	53
Auxiliary Port Connections	54
Preparing to Connect to a Network	54
Ethernet Connections	55
Serial Connections	55
Configuring Serial Connections	55
Serial DTE or DCE Devices	55
Signaling Standards Supported	56
Distance Limitations	56
Asynchronous/Synchronous Serial Module Baud Rates	57
ISDN BRI Connections	57
CSU/DSU Connections	58
Chassis Installation Procedures for Cisco2800 Series Routers	59
Installing Modules and Interface Cards	59
Installing Internal Field-Replaceable Units (FRUs)	62
Setting Up the Chassis	63
Rack-Mounting the Chassis	63
Attaching Rack-Mount Brackets to Cisco 2801 Routers	65
Attaching Rack-Mount Brackets to Cisco 2811, Cisco 2821, and Cisco 2851 Routers	65
Installing the Router in a Rack	66
Attaching Optional Cable Management Bracket	67
Chassis Grounding	68
Setting the Chassis on a Desktop	68
Mounting a Cisco 2811 Router on a Wall	69
Attaching Brackets to the Router for Wall Mounting	69
Attaching the Router to a Wall	70
Installing the Chassis Ground Connection	71
Cable Connection Procedures for Cisco2800 Series Routers	75
Power Connections	76
Connecting Routers to AC Power	76
Connecting Routers to DC Power	76
DC Wiring Requirements	77
Wiring Procedure for DC Input	78
Approved Scenarios and Scenarios Not Approved for Dual DC Power Supply Configuration in Cisco 280...	80
Connecting Routers to Backup Power	83
Connecting WAN, LAN, and Voice Cables	83
Ports and Cabling	84
Connection Procedures and Precautions	86
Connecting to a Console Terminal or Modem	86
Connecting to the Console Port	87
Connecting to the Auxiliary Port	87
Power Up and Initial Configuration Procedures for Cisco 2800 Series Routers	89
Powering Up Cisco 2800 Series Routers	89
Checklist for Power Up	89
Power Up Procedure	90
Verifying the Front Panel LED Indications	91
Verifying the Hardware Configuration	92
Configuring the Router	92
Initial Configuration Using Cisco Router and Security Device Manager	93
Initial Configuration Using the Setup Command Facility	93
Initial Configuration Using the Cisco CLI—Manual Configuration	96
Verifying the Initial Configuration	97
Completing the Configuration	97
Troubleshooting Cisco 2800 Series Routers	99
Solving Problems	100
Troubleshooting the Power and Cooling Systems	100
Environmental Reporting Features	101
Troubleshooting Modules, Cables, and Connections	101
Reading System LEDs	102
Reading Port and Module LEDs	105
System Messages	106
Recovering a Lost Password	110
More Troubleshooting Help—Cisco Technical Assistance Center	110
Installing Network Modules in Cisco2800 Series Routers	113
Viewing the Cisco Network Module Installation Guide	113
Installing Slot Dividers in Network Module Slots	114
Removing Slot Dividers from Network Module Slots	115
Installing and Removing Filler Panels in Network Module Slots	116
Installing Filler Panels in Network Module Slots	118
Removing Filler Panels from Network Module Slots	118
Installing Blank Panels over Empty Chassis Slots	119
Blank Panels for Network Module Slots	119
Related Product Documentation	119
Installing Interface Cards in Cisco 2800 Series Routers	121
Viewing the Cisco Interface Card Installation Guide	121
Installing and Removing Slot Dividers	121
Installing Slot Dividers in HWIC Slots on Cisco 2801 Routers	122
Installing Slot Dividers in HWIC Slots on Cisco 2811, Cisco 2821, and Cisco 2851 Routers	123
Removing Slot Dividers from HWIC Slots on Cisco 2801 Routers	125
Removing Slot Dividers from HWIC Slots on Cisco 2811, Cisco 2821, and Cisco 2851 Routers	125
Installing Blank Panels over Empty Chassis Slots	126
Blank Panels for HWIC Slots	127
Related Product Documentation	127
Installing and Upgrading Internal Modules in Cisco 2800 Series Routers	129
Safety Warnings	129
Removing the Chassis Cover	130
Removing the Cover from Cisco 2801 Routers	130
Removing the Cover from Cisco 2811 Routers	132
Removing the Cover from Cisco 2821 and Cisco 2851 Routers	135
Locating Modules	137
Installing and Removing DRAM DIMMs	140
DRAM DIMM Location and Orientation	141
Removing a DRAM DIMM	141
Installing a DRAM DIMM in a Cisco 2801 Router	142
Installing a DRAM DIMM in a Cisco 2811, Cisco 2821, or Cisco 2851 Router	143
Installing and Removing AIMs	144
Software Requirement for AIMs	145
AIM Location	145
Removing an AIM	145
Installing an AIM	146
Installing an AIM in a Cisco 2801 Router	146
Installing an AIM in a Cisco 2811, Cisco 2821, or Cisco 2851 Router	149
Installing a CompactFlash Memory Card on the AIM	153
Applying the AIM Label	154
Verifying AIM Installation	155
Installing and Removing PVDMs	156
PVDM Location and Orientation	157
Removing a PVDM	157
Installing a PVDM	158
Replacing the Power Supply	159
Installing an Inline Power Supply in a Cisco 2801 Router	159
Installing a Power Supply in a Cisco 2811 Router	161
Removing the Existing Power Supply	162
Installing an AC-Input Power Supply	164
Installing a DC-Input Power Supply	166
Installing an ILP Supply	168
Installing a Power Supply in a Cisco2821 or Cisco2851 Router	169
Removing the Existing Power Supply	170
Installing an AC-Input Power Supply	173
Installing a DC-Input Power Supply	175
Installing an ILP Supply	177
Installing the Chassis Cover	179
Installing the Cover on Cisco 2801 Routers	179
Installing the Cover on Cisco 2811 Routers	180
Installing the Cover on Cisco 2821 and Cisco 2851 Routers	181
Removing and Installing CompactFlash Memory Cards in Cisco 2800 Series Routers	183
Preventing Electrostatic Discharge Damage	183
Removing a CompactFlash Memory Card	183

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Installing and Upgrading Internal Modules in Cisco 2800 Series Routers

OL-5792-04

Removing the Chassis Cover

Removing the Cover from Cisco 2821 and Cisco 2851 Routers

Follow these steps to remove the chassis cover. A number 2 Phillips screwdriver is required.

Rack-mounted routers must be removed from the rack and positioned on a flat surface before you start

removing the cover.

The following warning applies only if the router is provided with a DC-power input:

Warning

Before performing any of the following procedures, ensure that power is removed from the DC

circuit.

Statement 1003

Step 1

Make sure that the router is turned off and disconnected from its power source.

Warning

Before opening the unit, disconnect the telephone-network cables to avoid contact with

telephone-network voltages.

Statement 1041

Step 2

Disconnect all network interface cables from the rear panel of the router.

Step 3

Place the router on a flat surface. Use a Phillips screwdriver to remove the three screws at the rear of the

top cover. Set the screws aside in a safe place.

Step 4

Lift the cover up to a 45-degree angle. (See

Figure 7

Step 5

Slide the cover to the side (toward the side with the fans) until the tabs are free from the slots. (See

Figure 7