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Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
December 10, 2014
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© 2014 Cisco Systems, Inc. All rights reserved.
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CONTENTS
Preface 7
Obtaining Documentation and Submitting a Service Request 1-9
CHAPTER
1 Overview 1-1
Cisco ASR 920 Series Routers Features 1-1
GigabitEthernet Copper Ports 1-2
GE SFP Ports 1-2
SFP+ Ports 1-2
Interface Modules 1-2
Front and Back Panel 1-7
Specifications 1-9
External Interfaces 1-10
Power Supply and Fans 1-12
LED Indicators 1-13
Online Insertion and Removal 1-17
Licensing the Router 1-18
Gigabit Ethernet RJ45 Interface Module (A900-IMA8T) 1-3
10-Gigabit Ethernet XFP Interface Module (A900-IMA1X) 1-4
2x1 10 Gigabit Ethernet SFP+ Interface Module (A900-IMA2Z) 1-4
8 Port T1/E1 Interface Module (A900-IMA8D) 1-5
Interface Availability on Interface Modules 1-6
Network Interfaces 1-10
Network Timing Interfaces 1-11
External Alarm Inputs 1-11
Management Interfaces 1-11
PWR and STAT LEDs 1-13
CPU Management Port LEDs 1-14
SFP LEDs 1-15
SFP+ LEDs 1-15
8 T1/E1 Interface Module LEDs 1-15
RJ-45 LEDs 1-16
Power Supply Unit LEDs 1-16
System–Interface LED Behavior 1-17
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Contents
CHAPTER
2 Preparing for Installation 2-1
Safety Guidelines 2-1
Standard Warning Statements 2-2
Safety Guidelines for Personal Safety and Equipment Protection 2-3
Safety Precautions for Module Installation and Removal 2-3
Safety with Electricity 2-3
Power Supply Considerations 2-7
Preventing ESD Damage 2-7
Site Planning 2-8
General Precautions 2-8
Site Planning Checklist 2-8
Site Selection Guidelines 2-9
Environmental Requirements 2-9
Physical Characteristics 2-9
Air Flow Guidelines 2-10
Air Flow Guidelines for ETSI Rack Installation 2-12
Floor Loading Considerations 2-13
Site Power Guidelines 2-13
Electrical Circuit Requirements 2-14
Site Cabling Guidelines 2-14
Asynchronous Terminal Connections 2-15
Interference Considerations 2-15
Rack-Mounting Guidelines 2-16
Precautions for Rack-Mounting 2-16
Rack Selection Guidelines 2-16
Equipment Rack Guidelines 2-17
Installation Checklist 2-18
Creating a Site Log 2-18
CHAPTER
2
Receiving the Router 2-19
Chassis-Lifting Guidelines 2-20
Tools and Equipment 2-21
Unpacking and Verifying the Shipped Contents 2-21
3 Installing 3-1
Prerequisites 3-1
Installing the Router in a Rack 3-1
Installing the Chassis Brackets 3-2
Installing the Router Chassis in the Rack 3-11
Attaching the Cable Guides 3-13
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Wall Mounting the Routers 3-15
Attaching the Brackets to the Router for Wall-Mounting 3-15
Mounting Routers on the Wall 3-16
Installing and Removing the Interface Module 3-18
Installing the Interface Module 3-19
Removing the Interface Module 3-20
Hot-Swapping the Interface Module 3-21
Installing and Removing the Fan Tray 3-22
Installing the Fan Tray 3-22
Removing the Fan Tray 3-24
Installing the Power Supply 3-27
Preventing Power Loss 3-28
Power Connection Guidelines 3-28
Guidelines for DC-Powered Systems 3-28
Guidelines for AC-Powered Systems 3-28
Installing a DC Power Supply 3-29
Installing a DC Power Supply Module 3-29
Attaching Cables to the DC Power Supply 3-30
Powering On the Router 3-31
Removing and Replacing a DC Power Supply 3-32
Installing an AC power Supply 3-34
Installing an AC Power Supply Module 3-34
Activating an AC Power Supply 3-35
Removing and Replacing an AC Power Supply 3-36
Contents
Installing and Removing SFP Modules 3-38
Installing SFP Modules 3-38
Removing SFP Modules 3-41
Connecting to the 10/100/1000 Ports 3-43
Connecting to SFP Modules 3-43
Connecting to Fiber-Optic SFP Modules 3-44
Installing the Chassis Ground Connection 3-44
Power Connection Guidelines 3-46
Guidelines for DC-Powered Systems 3-47
Guidelines for AC-Powered Systems 3-47
Preventing Power Loss 3-47
Activating a DC Power Supply 3-48
Activating an AC Power Supply 3-48
Connecting a Router to the Network 3-48
Connecting Console Cables 3-49
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Contents
Connecting to the USB Serial Port Using Microsoft Windows 3-49
Connecting to the Console Port Using Mac OS X 3-50
Connecting to the Console Port Using Linux 3-50
Installing the Cisco USB Device Driver 3-51
Uninstalling the Cisco USB Device Driver 3-52
Connecting to the EIA Console Port 3-52
Connecting a Management Ethernet Cable 3-53
Installing and Removing SFP and SFP+ Modules 3-54
Connecting a USB Flash Device 3-54
Removing a USB Flash Device 3-55
Connecting Timing Cables 3-55
Connecting a Cable to the BITS Interface 3-55
Connecting Cables to the GPS Interface 3-55
Connecting Ethernet Cables 3-57
Connecting Cables to SFP Modules 3-58
Connector and Cable Specifications 3-58
CHAPTER
CHAPTER
4 Initial Configuration 4-1
Checking Conditions Prior to System Startup 4-1
Powering Up the Router 4-2
Verifying the Front Panel LEDs 4-7
Verifying the Hardware Configuration 4-7
Checking Hardware and Software Compatibility 4-7
Configuring the Router at Startup 4-8
Accessing the CLI Using the Console 4-8
Configuring Global Parameters 4-9
Checking the Running Configuration Settings 4-10
Saving the Running Configuration to NVRAM 4-10
Safely Powering Off the Router 4-10
Automatic Shutdown of the Router 4-11
5 Troubleshooting 5-1
Pinouts 5-1
BITS Port Pinouts 5-1
GPS Port Pinout 5-2
Time-of-Day Port Pinouts 5-2
Alarm Port Pinouts 5-3
Management Ethernet Port Pinouts 5-3
USB Console Port Pinouts 5-4
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USB Flash or MEM Port Pinouts 5-4
RJ45C Port Pinouts 5-5
Optical Fiber Specifications 5-5
Alarm Conditions 5-5
Contents
CHAPTER
CHAPTER
A Site Log A-1
B Supported PIDs B-1
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Contents
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Preface
The preface describes the revision history, audience, organization, and conventions of the
Cisco ASR 920 Series Aggregation Services Routers. It also lists sources for obtaining additional
information and technical assistance from Cisco.
This document covers the following variants of the Cisco ASR 920 Series Aggregation Services Routers:
• ASR-920-24SZ-IM— Twenty Four 1GE Fiber ports, Four 10G ports, and One slot for modular
interface card, with replaceable redundant AC and DC power supplies
• ASR-920-24SZ-M—Twenty Four 1GE Fiber ports and Four 10G ports, with replaceable redundant
AC and DC power supplies
• ASR-920-24TZ-M—Twenty Four 1 GE Copper ports and Four 10G ports, with replaceable
redundant AC and DC power supplies
Document Revision History
The following table lists the major changes made to this document.
Release Date Change Summary
Cisco IOS XE Release 3.14.0S November 22, 2014 First release.
Document Audience
This guide is intended for users who are responsible for installing the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router. It is intended for users who may not be familiar with the
initial configuration and troubleshooting tasks, the relationship among tasks, or the Cisco IOS software
commands necessary to perform particular tasks.
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Organization
This guide includes the following sections:
Title Description
Overview Describes the features and specifications of the Cisco
Preparing for Installation Describes the installation of the Cisco ASR
Installing Describes the installation of router on a rack as well as
Initial Configuration Describes basic router configuration.
Troubleshooting Describes troubleshooting information.
Site Log Provides a record of actions related to installing and
Supported PIDs Describes the supported SFPs.
ASR 920 Series Aggregation Services Routers.
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M
Router at your site.
installation of its components.
maintaining the router.
Conventions
This document uses the following conventions:
Convention Indication
bold font Commands and keywords and user-entered text appear in bold font.
italic font Document titles, new or emphasized terms, and arguments for which you supply
values are in italic font.
[ ] Elements in square brackets are optional.
{x | y | z } Required alternative keywords are grouped in braces and separated by
vertical bars.
[ x | y | z ] Optional alternative keywords are grouped in brackets and separated by
vertical bars.
string A nonquoted set of characters. Do not use quotation marks around the string or
the string will include the quotation marks.
courier font Terminal sessions and information the system displays appear in courier font.
< > Nonprinting characters such as passwords are in angle brackets.
[ ] Default responses to system prompts are in square brackets.
!, # An exclamation point (!) or a pound sign (#) at the beginning of a line of code
indicates a comment line.
Note Means reader take note. Notes contain helpful suggestions or references to material not covered in the
manual.
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Obtaining Documentation and Submitting a Service Request
Tip Means the following information will help you solve a problem. The tips information might not be
troubleshooting or even an action, but could be useful information, similar to a Timesaver.
Caution Means reader be careful. In this situation, you might perform an action that could result in equipment
damage or loss of data.
Timesaver Means the described action saves time. You can save time by performing the action described in
the paragraph.
Warning
Warning
IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. Use the statement number provided at the end of
each warning to locate its translation in the translated safety warnings that accompanied this device.
SAVE THESE INSTRUCTIONS
Statements using this symbol are provided for additional information and to comply with regulatory
and customer requirements.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a
service request, and gathering additional information, see What’s New in Cisco Product Documentation
at: http://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html.
Subscribe to What’s New in Cisco Product Documentation, which lists all new and revised
Cisco technical documentation as an RSS feed and delivers content directly to your desktop using a
reader application. The RSS feeds are a free service.
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CHA P T ER
Overview
The Cisco ASR 920 Series Aggregation Services Router is a family of modular and fixed configuration
routers that enables Service Providers to provide business, residential, and mobile access services to
their users. It is the Carrier Ethernet access platform providing Ethernet services.
The Cisco ASR 920 Series Routers family complement and extend Cisco’s current and planned Carrier
Ethernet routing portfolio providing a cost optimized, and extended temperature range access platform.
Cisco ASR 920 Series Routers Features
The Cisco ASR 920 Series Routers family includes:
• ASR 920-Modular [ASR-920-24SZ-IM]—This sub-family with 1.5 RU form factor has fixed ENET
interfaces (four 10GE and twenty-four 1GE Fiber), one slot for modular interface card and
redundant modular power supplies (AC/DC). The interface modules from ASR 900 family of routers
can be leveraged for use with this model.
• ASR 920-Fixed [ASR-920-24SZ-M/ASR-920-24TZ-M]—This sub-family with 1 RU form factor
has fixed ENET interfaces (four 10GE and twenty-four 1GE Copper or SFP) and redundant modular
power supplies (AC/DC).
The following table provides a snapshot of the number and type of supported ports:
1
Table 1-1 Supported Ports on Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router
ASR 920 Sub-family 1 GE Port 10 GE Port Type of 1 GE Port Type of 10 GE Port Timing Ports
ASR-920-24SZ-IM 24 4 24 Fiber Built in 4 SFP+ ToD and BITS
GPS 1 PPS and
GPS 10 MHz
ASR-920-24SZ-M/
ASR-920-24TZ-M
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
24 4 24 Fiber
24 Copper
Built in 4 SFP+ NA
1-1
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Cisco ASR 920 Series Routers Features
GigabitEthernet Copper Ports
Fixed copper GigabitEthernet (GE) interfaces are provided through standard RJ-45 connectors. These
ports support the following features:
• Standard 10/100/1000Base-T/TX operation with forced or auto-negotiation for speed and duplex.
• Automatic crossover (auto-MDIX) for straight-through and crossover connections.
• Pause flow control as defined by the 802.3x standard.
• Frame size of 9216 bytes.
• Synchronous ENET operation that provides its recovered receive clock as an input clock source for
the SETS as well as uses the system-wide reference clock to derive its transmit clock.
GE SFP Ports
The GE SFP ports support the following features:
• 100Base-FX and 1000Base-X SFP modules.
Chapter 1 Overview
SFP+ Ports
• Copper SFP modules
• Digital optical monitoring as specified by the SFP.
• Any mix of SFPs is supported unless specifically noted.
• Pause flow control as defined by the 802.3x standard.
• Frame size of 9216 bytes.
• Synchronous ENET operation that provides its recovered receive clock as an input clock source for
the SETS as well as uses the system-wide reference clock to derive its transmit clock.
Note Copper based SFPs do not support synchronous ENET operations.
The SFP+ ports support the following features:
• Digital optical monitoring as specified by the optical transceiver module.
• Any mix of SFPs is supported unless specifically noted.
• Pause flow control as defined by the 802.3x standard.
• Frame size of 9216 bytes.
Interface Modules
The Cisco ASR-920-24SZ-IM Router interface modules are field-replaceable units. In addition to the
ports provided on an RSP, the Cisco ASR-920-24SZ-IM Router supports the following interface
modules:
• Gigabit Ethernet RJ45 Interface Module (A900-IMA8T)
• 10-Gigabit Ethernet XFP Interface Module (A900-IMA1X)
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Chapter 1 Overview
390614
• 2x1 10 Gigabit Ethernet SFP+ Interface Module (A900-IMA2Z)
• 8 Port T1/E1 Interface Module (A900-IMA8D)
Gigabit Ethernet RJ45 Interface Module (A900-IMA8T)
The Gigabit Ethernet RJ45 interface module provides eight Gigabit Ethernet copper ports. Figure 1-1
shows the interface module.
Figure 1-1 8 x 1-Gigabit Ethernet RJ45 (Copper) Interface Module
Cisco ASR 920 Series Routers Features
•
For more information about installing an RJ45 Gigabit Ethernet module, see the “Installing the
Interface Module” section on page 3-19.
• To determine interfaces available on the RJ45 Gigabit Ethernet module, see the “Interface
Availability on Interface Modules” section on page 1-6.
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Cisco ASR 920 Series Routers Features
10-Gigabit Ethernet XFP Interface Module (A900-IMA1X)
The 10-Gigabit Ethernet XFP interface module provides a single port supporting a 10-Gigabit Ethernet
XFP module. Figure 1-2 shows the interface module.
Figure 1-2 1 x 10-Gigabit Ethernet XFP Interface Module
Chapter 1 Overview
390617
For more information about installing a 10-Gigabit Ethernet XFP module, see the “Installing the
•
Interface Module” section on page 3-19.
• To determine interfaces available on the 10-Gigabit Ethernet XFP module, see the “Interface
Availability on Interface Modules” section on page 1-6.
• For information on supported SFPs, see the Cisco ASR 900 Series Aggregation Services Router
Interface Modules Data Sheet at
http://www.cisco.com/c/en/us/products/routers/asr-903-series-aggregation-services-routers/datash
eet-listing.html.
2x1 10 Gigabit Ethernet SFP+ Interface Module (A900-IMA2Z)
The 2-port 10-Gigabit Ethernet interface module provides a dual port supporting a 10-Gigabit Ethernet
SFP+ and XFP module.
Figure 1-3 2X10 Gigabit Ethernet Interface Module
1-4
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Chapter 1 Overview
364202
Cisco ASR 920 Series Routers Features
391549
• For more information about installing the 2X10 GE SFP Gigabit Ethernet module, see the “Installing
the Interface Module” section on page 3-19.
• To determine interfaces available on the 2X10 GE SFP Gigabit Ethernet module, see the “Interface
Availability on Interface Modules” section on page 1-6.
• For information on supported SFPs, see the Cisco ASR 900 Series Aggregation Services Router
Interface Modules Data Sheet at
http://www.cisco.com/c/en/us/products/routers/asr-903-series-aggregation-services-routers/datash
eet-listing.html.
8 Port T1/E1 Interface Module (A900-IMA8D)
The 8T1/E1 interface module provides connectivity for up to 8 x T1/E1 ports through RJ48C connectors
on the front panel. Figure 1-4 shows the interface module.
Figure 1-4 8 x T1/E1 Interface Module
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Cisco ASR 920 Series Routers Features
• For more information about installing a 8 Port T1/E1 interface module, see the “Installing the
Interface Module” section on page 3-19.
• To determine interfaces available on the 8 Port T1/E1 interface module, see the “Interface
Availability on Interface Modules” section on page 1-6.
• For LED indicator information on the 8 Port T1/E1 interface module, see the “8 T1/E1 Interface
Module LEDs” section on page 1-15.
• For RJ45C pinout information on the 8 Port T1/E1 interface module, see the “RJ45C Port Pinouts”
section on page 5-5.
Interface Availability on Interface Modules
Note Cisco ASR-920-24SZ-IM Router does not support over-subscription mode. You must disable the ports
as appropriate to restrict the system usage to 64 Gbps. Enabling all the interfaces in over-subscription
mode can result in an unpredictable system performance.
The following table provides a snapshot of the interfaces available on supported interface modules:
Chapter 1 Overview
Table 1-2 Interface Availability on Supported Interface Modules
Interface Module Quantity Interfaces in Resulting System
Cu SFP 10GE T1/E1 OC3/
OC12
System
Oversubscribed
DS3
/E3
Front Panel
Ports Disabled
None 0 0 24 4 0 0 0
A900-IMA8T 1 8 16 4 0 0 0 No 16 to 23
A900-IMA2Z 1 0 24 6 0 0 0 Yes
A900-IMA1X 1 0 24 5 0 0 0 Yes
A900-IMA8D 1 0 20 4 8 0 0 No 20 to 23
1-6
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Chapter 1 Overview
1
3578 10
11
14 15
16
17 18
19
20
21
6
2 49
391970
1312
2
1
391971
Front and Back Panel
The following figures show the port numbering for the Cisco ASR-920-24SZ-IM Router:
Figure 1-5 Front Panel of Cisco ASR-920-24SZ-IM Router
Cisco ASR 920 Series Routers Features
1 Power Supply 0 (AC or DC) 12 4x10GE SFP+
2 Power Supply 0 LED (AC or DC) 13 Alarm port
3 Power Supply 1 (AC or DC) 14 USB Console port
4 Power Supply 1 LED (AC or DC) 15 USB Memory port
5 RJ-48 slot for ToD 16 Interface Module (IM) power LED
6 RJ-48 slot for BITS 17 1 PPS co-axial connector
7 Console port (TIA/EIA-232F) 18 10 MHz co-axial connector
8 Auxiliary Console port 19 IM Status LED
9 Management port 20 System Status LED
10 24x1GE SFP Fiber ports 21 Board power LED
11 Slot for ports on the interface module — —
Figure 1-6 Back Panel of Cisco ASR-920-24SZ-IM Router
1 Grounding lugs 2 Fan status LED
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Cisco ASR 920 Series Routers Features
1 3
5
6
12
11
2 4
8
7 1091314
391972
21
391973
Figure 1-7 Front Panel of Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
1 Power Supply 0 (AC or DC)
2 Power Supply 0 LED (AC or DC) 9 4x10GE SFP+
3 Power Supply 1 (AC or DC) 10 USB Memory port
4 Power Supply 1 LED (AC or DC) 11 Alarm port
5 Console port (TIA/EIA-232F) 12 USB Console port
6 Management port 13 Board power LED
7 Auxiliary Console port 14 System Status LED
Chapter 1 Overview
8 24x1GE SFP Fiber (Cisco ASR-920-24SZ-M)
24x1GE SFP Copper (Cisco ASR-920-24TZ-M)
Figure 1-8 Back Panel of Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
1 Grounding lugs 2 Fan status LED
1-8
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Chapter 1 Overview
Specifications
Cisco ASR 920 Series Routers Features
Table 1-3 describes the other features of Cisco ASR-920-24SZ-IM Router (AC and DC) and Cisco
ASR-920-24SZ-M, ASR-920-24TZ-M Router (AC and DC) Routers.
Table 1-3 Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Specifications
Specification ASR-920-24SZ-IM ASR-920-24SZ-M, ASR-920-24TZ-M
Dimension
Width x Depth x
Height
Weight 7.08 kg
Rack Unit One and a half RU One RU
Airflow Front to back and side to back Front to back
Cable access Front cable access Front cable access
System throughput 64 Gbps 64 Gbps
Modularity Interface module None
Power Supply
Redundant Yes Yes
AC Yes Yes
Power
Specification
DC Yes Yes
Power
Specification
System Power
Consumption
Power Dissipation 614.18 BTU/hr Maximum,
Operating
Temperature/Humidity
Alarms
17.5 x 9.43 x 2.6 inches
Note Dimensions exclude the
PSU and IM handle.
17.5 x 9.43 x 1.72 inches
Note Dimensions exclude the PSU and
IM handle.
ASR-920-24SZ-M: 5.53 kg
(inclusive of rack brackets,
twenty-four SFP and four SFP+
optics, two AC PSUs and an IM
card)
ASR-920-24TZ-M: 4.90 kg
(inclusive of rack brackets, twenty-four
SFP (only for ASR-920-24SZ-M) and
four SFP+ optics and two AC PSUs)
250 W Maximum 250 W Maximum
250 W Maximum 250 W Maximum
180 W Maximum, 130 W Typical
(including installed IM)
ASR-920-24SZ-M: 145 W Maximum,
110 W Typical
ASR-920-24TZ-M: 130 W Maximum,
100 W Typical
ASR-920-24SZ-M: 494.76 BTU/hr
443.57 BTU/hr Typical
(including installed IM)
Maximum, 375.33 BTU/hr Typical
ASR-920-24TZ-M: Max: 443.57
BTU/hr Maximum, 341.21 BTU/hr
Typica l
–40º C to 70º C
5-95% RH
• 4 alarm dry contact inputs
(normally open)
• LED indicators for critical,
major and minor alarms
–40º C to 70º C
5-95% RH
• 4 alarm dry contact inputs (normally
open)
• LED indicators for critical, major
and minor alarms
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Cisco ASR 920 Series Routers Features
Table 1-3 Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Specifications
Specification ASR-920-24SZ-IM ASR-920-24SZ-M, ASR-920-24TZ-M
TDM Support Supported through IM card None
Mounting option
• Front or rear rail 19 inches or
23 inches
Chapter 1 Overview
• Front or rear rail 19 inches or 23
inches
• ETSI 300 mm cabinet
• Wall Mount (with only side
mount option).
Note For more information,
see Wall Mounting the
Routers, page 3-15.
Port Configuration 24x1G and 4x10G ports and IM
• ETSI 300 mm cabinet
• Wall Mount (with only side mount
option)
Note For more information, see Wall
Mounting the Routers,
page 3-15.
24x1G and 4x10G ports
card ports
Port Numbering 24x1G SFP – Port [0:23]
4x10G SFP+ – Port [24:27]
24x1G SFP (Fiber) – Port [0:23]
(ASR-920-24SZ-M)
24x1G SFP (Copper) – Port [0:23]
(ASR-920-24TZ-M)
4x10G SFP+ – Port [24:27]
Combo Ports No combo ports No combo ports
LEDs Data Port LEDs
System Status LED
Management Port LED
PSU LED
System Status LED
Management Port LED
PSU LED
Fan Tray LED
Fan Tray LED
Temperature Sensors Five temperature sensors for
Board
Five temperature sensors for Board
Two temperature sensors for each PSU
Two temperature sensors for each
PSU
Timing Interfaces External ports for BITS/ToD
SMA ports for 1 PPS and 10 M
No external timing ports
1588v2 and SyncE feature supported
1588v2 and SyncE feature
supported
External Interfaces
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router have these external
physical interfaces on the front panel:
Network Interfaces
The network interfaces are provided through fixed ports.
• GE SFP ports (fiber)—supports 100/1000 modes (ASR 920-24SZ-IM and ASR-920-24SZ-M)
• GE SFP ports (copper)—supports 10/100/1000 operation (ASR-920-24TZ-M)
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Chapter 1 Overview
• 10GE SFP+—supports 10G mode.
Network Timing Interfaces
Note Network timing interface is available only on Cisco ASR-920-24SZ-IM Router.
• BITS input or output—The BITS interfaces support clock recovery from either a T1 at 1.544 MHz
or an E1 at 2.048 MHz, configurable by software. BITS interface is provided through a standard
RJ-48 connector on the front panel.
• 1PPS input or output and ToD input or output—This shielded RJ-45 interface is used for input
or output of time-of-day (ToD) and 1PPS pulses. ToD format includes both NTP and IEEE
1588-2008 time formats.
The same RS422 pins for 1PPS and TOD are shared between input and output directions. The
direction for each can be independently configurable through software.
• GPS 10 Mhz input and output—10 MHz input for GPS Synchronization. This connector on the
front panel can provide 10MHz output as well from Cisco ASR-920-24SZ-IM Router. The direction
can be configured using software.
• GPS 1 PPS input and output—1 PPS input for GPS Synchronization. This connector on the front
panel can provide 1 PPS output as well from Cisco ASR-920-24SZ-IM Router. The direction can be
configured using software.
Cisco ASR 920 Series Routers Features
External Alarm Inputs
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router supports four dry contact
alarm inputs through an RJ-45 jack on the front panel.
• Normally Open—indicates that no current flows through the alarm circuit and the alarm is
generated when the current is flowing.
Each alarm input can be provisioned as critical, major, or minor.
Management Interfaces
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router have the following
management interfaces:
Management ENET Port
A single management copper ENET port supporting 10/100/1000Base-T operation is provided on the
front panel. It uses a standard RJ-45 jack.
Note This is not a data plane port.
Note This interface does not support Synchronous Ethernet Clocking.
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Cisco ASR 920 Series Routers Features
RS232-EIA Console Port
The RS232-EIA console port provides transmission (Tx), reception (Rx), and ground (Gnd).
Note The RS232-EIA console port is enabled only through the Cisco-designed cable adapter USB type A
cable to RJ-45 adapter cable. To use this port, disable the flow control on the terminal.
USB Console
A single USB 2.0 Type-A receptacle is provided on the front panel of the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router for providing console access to ROMMON, Cisco
IOS-XE and diagnostics. While it uses the Type-A connector, it operates as a USB peripheral only for
connection to an external host computer. This interface requires the use of a Type-A to Type-A connector
instead of a standard USB cable.
Note Use of the USB console is mutually exclusive of the RS232 console port. When the USB console cable
is inserted in the USB console port, the RS232 console port is automatically disabled. This interface
requires the use of a Type-A to Type-A USB cable.
Chapter 1 Overview
Note To use the USB console, you must download and install EXAR driver XR21x1410 on the external host
computer.
USB Mass Storage
A single USB 2.0 Type-A receptacle is provided on the front panel of the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router for inserting external USB mass storage devices, such as
standard USB flash drives. This interface is used to load images, load or store configurations, write logs,
and so on. It supports operation up to 12Mbps.
Maximum memory supported in ROMmon is 8GB and in Cisco IOS is 16GB.
RS232 Auxiliary Console Port
The RS232 Aux console port provides transmission (Tx), reception (Rx), and ground (Gnd).
Note The RS232 Aux console port is enabled only through the Cisco-designed cable adapter from USB type
A cable to RJ-45 adapter cable. To use this port flow control must be disabled.
Note This is a debug-only port. it is recommended that this port be used by field service engineers only.
Power Supply and Fans
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router support either AC or DC
power supplies in a 1+1 redundant configuration. The PSUs are hot-swappable. Load is shared between
PSUs when both the PSUs are inserted and powered-up. Status LED provided on both AC and DC PSU
indicates the status and output condition.
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Chapter 1 Overview
Note DC PSU can be switched on or off using a switch on the front panel of the DC PSU.
Note For DC PSU, the UVP and OVP limits vary depending on the input voltage applied at power up:
Cisco ASR 920 Series Routers Features
Table 1-4 Power Supply Specification
Specification AC DC
Voltage 100 V – 240 V, 50/60Hz -48/-60 V or 24 V
Current 2.6 A through a standard C16 type
receptacle
Input Power 260 W (ASR-920-PWR-A) 260 W (ASR-920-PWR-D)
For -48/-60 V: UVP= -36 Vdc and OVP = -72 Vdc
For 24 V: UVP =18 Vdc and OVP = 32 Vdc
5.5 A –48/–60 V
11 A –24 V
through a two-position terminal block
Note This product requires surge protection as part of the building installation. To comply with the Telcordia
GR-1089 NEBS standard for electromagnetic compatibility and safety, an external surge protective
device (SPD) is required at the AC power service equipment.
Note For DC systems, if a surge of more than 1KV is expected, add an appropriate external surge protective
device.
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router have removable fan tray
as part of the system. The fan tray is hot-swappable. The system is designed to operate at its maximum
operating temperature of 70º C and at 65º C in case of failure of a single fan, for a maximum of four
hours.
LED Indicators
This section describes the different types of LEDs and their behavior.
PWR and STAT LEDs
The PWR and STAT LEDs are available on the front panel. These LEDs provide power on the board
(PWR) and overall router health (STAT) status. During power up state, these LEDs provide booting
status and report errors.
Note The digital code signing functionality validates the integrity and authenticity of the ROMMON image
before booting it.
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Chapter 1 Overview
Cisco ASR 920 Series Routers Features
Table 1-5 PWR and STAT LED Indications
PWR LED State STAT LED state Indication Comment
Amber Off Power in the system is all right and FPGA
configuration is taking place.
Amber Red FPGA Image Validation Error. System is in unresponsive
Flashing Amber and
Green alternatively
Flashing Amber and
Green alternatively
Amber Upgrade FPGA image error, continuing with
Golden FPGA image.
Off FPGA configuration successful and Digital
code signing successfully validated FPGA
image. Digital code signing passed the
control to Microloader to boot ROMMON.
Flashing Amber and
Green alternatively
Red Digital code signing reported failure in
ROMMON image validation.
Green Flashing Amber ZTP process has begun. Both LEDs turn Green once
Green Off IOS-XE image is booting.
Green Green Successfully booted and system is operating
normally.
Green Amber A minor alarm or synchronization is in
Holdover or free-running mode
Green Red A major or critical alarm (high temperature
reported for any sensor) or multiple fan
failure.
Permanent Amber/Off
indicates FPGA configuration
failure.
state. No console messages.
—
—
System is in unresponsive
state. No console messages.
provisioning is complete.
—
—
—
CPU Management Port LEDs
The LED for the 10/100/1000 Management port is integrated on the connector itself. There are two LEDs
in the connector—the LED on the left indicates the Link/Activity status and the LED on the right
indicates the duplex status of the link.
Table 1-6 CPU Management Port LED Indication
LED LED State Indication
Left Green Link up in 1000 Mbps
Right Green Link up in full duplex
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Blinking Green Activity in 1000 Mbps
Amber/Orange Link up in 100/10 Mbps
Blinking Amber/Orange Activity in 100/10 Mbps
Off Link down
Off Link up in half duplex
Page 27
Chapter 1 Overview
SFP LEDs
SFP+ LEDs
Cisco ASR 920 Series Routers Features
Each SFP port has an LED indicator. The LED is configured such that the up arrow indicates the port on
the upside and the down arrow indicates the port on the downside.
Table 1-7 SFP Port LED Indication
LED LED State Indication
Labeled same as the
SFP port number
Each SFP+ port has an LED indicator.
Table 1-8 SFP+ Port LED Indication
Green Link up in 1000Base-X/100Base-FX
Blinking Green Activity in 1000 Base-X/100Base-FX
Yellow Fault/Error
Off Link down
LED LED State Indication
Labeled same as the
SFP port number
8 T1/E1 Interface Module LEDs
Table 1-9 summarizes the LEDs for the 8 x T1/E1 interface module.
Table 1-9 8 x T1/E1 Interface Module LEDs
LED LED State Indication
Active Green Active
Port Green All ports up
Green Link up in 10G
Blinking Green Activity in 10G
Yellow Fault/Error
Off Link down
Off Operationally down; card is disabled or
shut down
Blinking green All ports up and one or more ports in a
loopback state
Amber One or more configured ports are down
Blinking amber One or more configured ports are down
and at least one configured port is in a
loopback state
Off All ports disabled or shut down
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Cisco ASR 920 Series Routers Features
Table 1-9 8 x T1/E1 Interface Module LEDs
LED LED State Indication
Power
(PWR)
Operating Status
(STAT)
RJ-45 LEDs
Each RJ-45 port has two LED indicators. Left LED indicates the Link status; right LED indicates the
status of the duplex LED.
Chapter 1 Overview
Green All power rails are within supported range
Red Disabled
Off No power to the Interface Module
Red Failed
Off Disabled or powered-down
Blinking red Booting
Green Active
Table 1-10 RJ-45 LED Indication
LED LED State Indication
Left Green Link up in 10/100/1000Base-T
Right Green Link up in full duplex
Power Supply Unit LEDs
Each power supply unit has a corresponding LED on the front panel.
Table 1-11 PSU LED Indication
LED LED State Indication
OK Green Power Supply is working and 12V output is alright.
Blinking Green Activity in 10/100/1000Base-T
Yellow Fault/Error
Off Link down
Off Link up in half duplex
Red 12V output failure (Either input not present or fault
in the power supply unit).
1-16
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Chapter 1 Overview
System–Interface LED Behavior
Table 1-12 1G Copper and 1G SFP LED Indication
Event
ROMMON Off/Off Off
IOS Shut Off/Off Off
IOS No shut (cable disconnect) Yellow/Off Yellow
IOS No shut (cable connect)
(media-type RJ-45)
IOS No shut (cable connect)
(media-type SFP)
IOS No shut (cable connect)
(media-type auto)
Cisco ASR 920 Series Routers Features
1G Copper Port LEDs
(Link/Duplex) 1G SFP Port LEDs
Green/Green Off
Off/Off Green
Off/Off Green
Table 1-13 Management Port LED Indication
Event 10G Port LEDs Management Port LEDs (Link/Duplex)
ROMMON (cable connect) Off Green/Green (1000 Mbps, Full Duplex)
ROMMON (cable disconnect) Off Off/Off
IOS Shut Off Off/Off
IOS No shut (cable disconnect) Orange Off/Off
IOS No shut (cable connect) Green Green/Green in 1G mode
Online Insertion and Removal
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router supports the following
OIR operations:
• When an SFP is removed, there is no effect on traffic flowing on other ports.
• When an SFP is installed, the system initializes that port for operation based upon the current
configuration. If the inserted SFP is incompatible with the current configuration for that port, the
port does not become operational until the configuration is updated.
• Both power supplies are installed and active and the load may be shared between them or a single
PSU could support the whole load. When a power supply is not working or the input cable is
removed, the remaining power supply takes the entire load without disruption.
• Except for TDM IM, you can hot-swap an interface module with a similar interface module on Cisco
ASR-920-24SZ-IM Router. For more information, see “Hot-Swapping the Interface Module”
section on page 3-21.
Orange/Green (100/10 Mbps, Full Duplex)
Orange/Green in 100/10M mode
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Cisco ASR 920 Series Routers Features
• When a fan tray is removed or replaced, there is no need to power down the router. However, when
the fan tray is removed from chassis the router shuts down automatically after some time, depending
on the ambient temperature. The time duration before the router shuts down is shown in the table
below:
Table 1-14 Cisco ASR-920-24SZ-IM Router Shut Down Time Table
Sl. Inlet Ambient Temperature (ºCelsius) Shut Down Time (Minimum)
1 –10 to –5 14 minutes
2 –4 to 15 8 minutes
3 16 to 29 6 minutes 30 seconds
4 30 to 40 4 minutes 30 seconds
5 41 to 44 3 minutes 20 seconds
6 45 to 49 2 minutes 50 seconds
7 50 to 54 2 minutes 10 seconds
8 55 to 59 1 minutes 35 seconds
9 60 to 64 1 minute
10 65 and above 35 seconds
Chapter 1 Overview
Licensing the Router
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router support the following
types of licenses:
• Port Licensing—Port Upgrade license is available as a "Pay as you Grow" model.
–
1G upgrade license
–
10G upgrade license
• Bulk licensing—Bulk port licensing allows you to enable all the ports with a single license.
• Timing license (1588)—Timing license is required if the router is used as a master clock.
• Advanced Metro IP Access
• Metro IP Access
• Metro Access (default)
The following methods are used to activate the above licenses:
• Cisco Software Licensing—The Cisco Software License Activation feature is a set of processes and
components to activate Cisco software feature sets by obtaining and validating fee-based Cisco
software licenses.
Note Licenses generated by the Cisco Software Licensing are tied to the UDI of the chassis and a
corresponding watchtower device certificate (WDC) is stored in the system.
1-18
• Cisco Smart Licensing—Smart Licensing is usage-based licensing where devices register with the
Cisco Secure server.
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Preparing for Installation
This chapter describe how to prepare for the installation of the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router at your site, and contains the following sections:
• Safety Guidelines, page 2-1
• Site Planning, page 2-8
• Receiving the Router, page 2-19
Safety Guidelines
Before you begin the installation of the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router, review the safety guidelines in this chapter to avoid injuring yourself or
damaging the equipment.
In addition, before replacing, configuring, or maintaining the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router, review the safety warnings listed in the Regulatory
Compliance and Safety Information for the Cisco ASR 920 Series Router document.
CHA P T ER
2
The following sections describe the safety guidelines for the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• “Standard Warning Statements” section on page 2
• “Safety Guidelines for Personal Safety and Equipment Protection” section on page 3
• “Safety Precautions for Module Installation and Removal” section on page 3
• “Safety with Electricity” section on page 3
• “Power Supply Considerations” section on page 7
• “Preventing ESD Damage” section on page 7
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Safety Guidelines
Standard Warning Statements
To see translations of the warnings that appear in this publication, see the Regulatory Compliance and
Safety Information for the Cisco ASR 920 Series Router document.
Chapter 2 Preparing for Installation
Warning
Warning
Warning
Warning
Warning
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special
precautions to ensure that the system remains stable. The following guidelines are provided to ensure
your safety:
this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom
of the rack. If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit
in the rack.
This unit is intended for installation in restricted access areas. A restricted access area can be
accessed only through the use of a special tool, lock and key, or other means of security.
Statement 1017
Ultimate disposal of this product should be handled according to all national laws and regulations.
Statement 1040
To prevent the system from overheating, do not operate it in an area that exceeds the maximum
recommended ambient temperature of 158°F (70°C).
The chassis should be mounted on a rack that is permanently affixed to the building.
This unit should be mounted at the bottom of the rack if it is the only unit in the rack. When mounting
Statement 1006
Statement 1047
Statement 1049
2-2
Warning
Warning
Warning
Warning
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
IMPORTANT SAFETY INSTRUCTIONS: This warning symbol means danger. You are in a situation that
could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with
electrical circuitry and be familiar with standard practices for preventing accidents. Use the
statement number provided at the end of each warning to locate its translation in the translated safety
warnings that accompanied this device.
This is a Class A Device and is registered for EMC requirements for industrial use. The seller or buyer
should be aware of this. If this type was sold or purchased by mistake, it should be replaced with a
residential-use type.
This is a class A product. In a domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.
This equipment is in compliance with the essential requirements and other relevant provisions of
Directive 1999/5/EC.
Statement 294
Statement 287
Statement 1071
Statement 340
Page 33
Chapter 2 Preparing for Installation
Safety Guidelines for Personal Safety and Equipment Protection
The following guidelines help ensure your safety and protect the equipment. This list does not include
all the potentially hazardous situations. Therefore, you should be on alert.
• Before moving the system, always disconnect all the power cords and interface cables.
• Never assume that power is disconnected from a circuit; always check.
• Before and after installation, keep the chassis area clear and dust free.
• Keep tools and assembly components away from walk areas where you or others could trip over
them.
• Do not work alone if potentially hazardous conditions exist.
• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
• Do not wear loose clothing that may get caught in the chassis.
• When working under conditions that may be hazardous to your eyes, wear safety glasses.
Safety Precautions for Module Installation and Removal
Safety Guidelines
Be sure to observe the following safety precautions when you work on the router.
To see the translations of the warnings that appear in this publication, see the Regulatory Compliance
and Safety Information for the Cisco ASR 920 Series Router document.
Warning
Warning
Warning
Warning
Class 1 laser product.
Do not stare into the beam or view it directly with optical instruments.
Invisible laser radiation present.
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments.
Safety with Electricity
Warning
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units.
Statement 1008
Statement 1011
Statement 1016
Statement 1051
Statement 12
Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings,
necklaces, and watches). Metal objects will heat up when connected to power and ground and can
cause serious burns or weld the metal object to the terminals.
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
Statement 43
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Safety Guidelines
Chapter 2 Preparing for Installation
Warning
Warning
Warning
Warning
Warning
Warning
Avoid using or servicing any equipment that has outdoor connections during an electrical storm.
There may be a risk of electric shock from lightning.
Statement 1088
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Read the installation instructions before connecting the system to the power source.
Statement 1004
This product relies on the building’s installation for short-circuit (overcurrent) protection. For a DC
installation, ensure that the branch circuit breaker is rated a maximum 15A for DC systems. For AC
systems, 15A for voltages greater than 200Vac; 20A for voltages below 127Vac.
Take care when connecting units to the supply circuit so that wiring is not overloaded.
Statement 1005
Statement 1018
The plug-socket combination must be accessible at all times, because it serves as the main
disconnecting device.
Statement 1019
Warning
Warning
Warning
Warning
Warning
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ45 connectors. Use caution when connecting cables.
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
Statement 1021
Statement
1022
To reduce the risk of fire, use only 26 AWG or larger telecommunication line cord.
Statement 1023
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Use copper conductors only.
Statement 1025
Statement 1024
This unit might have more than one power supply connection. All connections must be removed to
de-energize the unit.
Statement 1028
2-4
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Chapter 2 Preparing for Installation
Safety Guidelines
Warning
Warning
Warning
Warning
Warning
Warning
To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the
handles on modules (such as power supplies, fans, or cards); these types of handles are not designed
to support the weight of the unit.
Statement 1032
Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV)
requirements in IEC 60950 based safety standards.
Statement 1033
When installing or replacing the unit, the ground connection must always be made first and
disconnected last.
Statement 1046
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Installation of the equipment must comply with local and national electrical codes.
Statement 1024
Statement 1074
Hazardous voltage or energy may be present on power terminals. Always replace cover when
terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in
place.
Statement 1086
When working on equipment powered by electricity, follow these guidelines:
• Locate the room’s emergency power-off switch. If an electrical accident occurs, you will be able to
quickly turn off the power.
• Before starting work on the system, turn off the DC main circuit breaker and disconnect the power
terminal block cable.
• Before doing the following, disconnect all power:
–
Working on or near power supplies
–
Installing or removing a router chassis or network processor module
–
Performing most hardware upgrades
• Never install equipment that appears damaged.
• Carefully examine your work area for possible hazards, such as moist floors, ungrounded power
extension cables, and missing safety grounds.
• Never assume that power is disconnected from a circuit; always check.
• Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
• If an electrical accident occurs, proceed as follows:
–
Use caution, and do not become a victim yourself.
–
Turn off power to the router.
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Safety Guidelines
Chapter 2 Preparing for Installation
–
If possible, send another person to get medical aid. Otherwise, determine the condition of the
victim, and then call for help.
–
Determine whether the person needs rescue breathing or external cardiac compressions; then
take appropriate action.
In addition, use the following guidelines when working with any equipment that is disconnected from a
power source, but still connected to telephone wiring or network cabling:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in wet locations unless the jack is specifically designed for it.
• Never touch uninsulated telephone wires or terminals unless the telephone line is disconnected at
the network interface.
• When installing or modifying telephone lines, use caution.
2-6
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Chapter 2 Preparing for Installation
Power Supply Considerations
Check the power at your site to ensure that you are receiving clean power (free of spikes and noise).
Install a power conditioner, if necessary.
Preventing ESD Damage
Safety Guidelines
Warning
This equipment needs to be grounded. Use a green and yellow 6 AWG ground wire to connect the host
to earth ground during normal use.
Statement 383
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD may occur
when electronic printed circuit cards are improperly handled and can cause complete or intermittent
failures. When removing and replacing modules, always follow ESD prevention procedures:
• Ensure that the router chassis is electrically connected to earth ground.
• Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. To channel unwanted
ESD voltages safely to ground, connect the clip to an unpainted surface of the chassis frame. To
guard against ESD damage and shocks, the wrist strap and cord must operate effectively.
• If no wrist strap is available, ground yourself by touching a metal part of the chassis.
• When installing a component, use any available ejector levers or captive installation screws to
properly seat the bus connectors in the backplane or midplane. These devices prevent accidental
removal, provide proper grounding for the system, and help to ensure that bus connectors are
properly seated.
• When removing a component, use available ejector levers or captive installation screws, if any, to
release the bus connectors from the backplane or midplane.
• Handle components by their handles or edges only; do not touch the printed circuit boards or
connectors.
• Place a removed component board side up on an antistatic surface or in a static-shielding container.
If you plan to return the component to the factory, immediately place it in a static-shielding
container.
• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
• Never attempt to remove the printed circuit board from the metal carrier.
Note For the safety of your equipment, periodically check the resistance value of the antistatic wrist strap. It
should be between 1 and 10 Mohm.
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Site Planning
Site Planning
The following sections describe how to plan for the installation of the Cisco ASR 920 Series Router:
• “General Precautions” section on page 8
• “Site Planning Checklist” section on page 8
• “Site Selection Guidelines” section on page 9
• “Air Flow Guidelines” section on page 10
• “Floor Loading Considerations” section on page 13
• “Site Power Guidelines” section on page 13
• “Site Cabling Guidelines” section on page 14
• “Rack-Mounting Guidelines” section on page 16
• “Installation Checklist” section on page 18
• “Creating a Site Log” section on page 18
Chapter 2 Preparing for Installation
General Precautions
Observe the following general precautions when using and working with your Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• Keep your system components away from radiators and heat sources and do not block cooling vents.
• Do not spill food or liquids on your system components and never operate the product in a wet
environment.
• Do not push any objects into the openings of your system components. Doing so can cause fire or
electric shock by shorting out interior components.
• Position system cables and power supply cable carefully. Route system cables and the power supply
cable and plug so that they are not stepped on or tripped over. Be sure that nothing else rests on your
system component cables or power cable.
• Do not modify power cables or plugs. Consult a licensed electrician or your power company for site
modifications. Always follow your local and national wiring rules.
• If you turn off your system, wait at least 30 seconds before turning it on again to avoid damage of
system components.
Site Planning Checklist
Use the following checklist to perform and account for all the site planning tasks described in this
chapter:
2-8
• The site meets the environmental requirements.
• The site’s air conditioning system can compensate for the heat dissipation of the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router.
• The floor space that the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router
occupies can support the weight of the system.
• Electrical service to the site complies with the requirements.
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• The electrical circuit servicing the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router complies with the requirements.
• Consideration has been given to the console port wiring and limitations of the cabling involved,
according to TIA/EIA-232F.
• The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Ethernet cabling
distances are within the prescribed limitations.
• The equipment rack in which you plan to install the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router complies with prescribed requirements.
• When selecting the location of the rack, careful consideration must be given to safety, ease of
maintenance, and proper airflow.
Site Selection Guidelines
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router require specific
environmental operating conditions. Temperature, humidity, altitude, and vibration can affect the
performance and reliability of the router. The following sections provide specific information to help you
plan for the proper operating environment.
Site Planning
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router are designed to meet the
industry EMC, safety, and environmental standards described in the Regulatory Compliance and Safety
Information for the Cisco ASR 920 Series Router document.
Environmental Requirements
Environmental monitoring of the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M
Router protects the system and components from damage caused by excessive voltage and temperature
conditions. To ensure normal operation and avoid unnecessary maintenance, plan and prepare your site
configuration before installation. After installation, make sure that the site maintains the environmental
characteristics described in Table 1-3 .
For an outside plant installation (cell site cabinet, hut etc.), it is required that the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router be protected against airborne
contaminants, dust, moisture, insects, pests, corrosive gases, polluted air or other reactive elements
present in the outside air. To achieve this level of protection, we recommend that the unit be installed in
a fully sealed enclosure or cabinet. Examples of such cabinets include IP65 cabinets with heat exchanger
complying with Telecordia GR487. Temperature must be maintained within –40º C to 70º C.
The equipment shall be placed inside a space protected from direct outside weather and environmental
stresses by an enclosure, and where the operating climate, as defined by Class 2 of GR-3108-CORE, is
between
• -40°C (-40°F) and 70°C (158°F)
• 5 and 85% RH.
Physical Characteristics
Be familiar with the physical characteristics of the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router to assist you in placing the system in the proper location. For more
information, see Tab l e 1-3.
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Site Planning
391992
392002
Air Flow Guidelines
Cool air is circulated through the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M
Router by fans located along the back side of the router.
The internal fans maintain acceptable operating temperatures for the internal components by drawing in
cool air through the vents, and circulating the air through the chassis.
The direction of air flow is from front-to-back.
Figure 2-1shows the direction of the air flow through the Cisco ASR-920-24SZ-IM Router.
Figure 2-2shows the direction of the air flow through the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M
Router.
Figure 2-1 Air Flow in the Cisco ASR-920-24SZ-IM Router
Chapter 2 Preparing for Installation
2-10
Figure 2-2 Air Flow in the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
To ensure adequate air flow through the equipment rack, it is recommended that you maintain a
minimum clearance distance as mentioned below, at all times.
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Chapter 2 Preparing for Installation
12.7cm
(127mm)
Airflow
10cm
(100mm)
Airflow
391852
Front
Passive System
• front clearance—12.7 cm
• rear clearance—10 cm
Site Planning
Rear
10cm
(100mm)
Airflow
24.4cm
(244mm)
12.7cm
(127mm)
Front
Airflow
391850
Note the following points:
• When installing Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router in a
back-to-back position with another device, ensure that there is a minimum of 10 cm air flow
clearance between the two devices.
Also ensure that the device behind the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router is not installed in a way that t it blows air into the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router.
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Site Planning
12.7cm
(127mm)
Airflow
10cm
(100mm)
Airflow
Airflow
Airflow
12.7cm
(127mm)
Airflow
391851
Front Front
1 RU
Chapter 2 Preparing for Installation
• If airflow through the equipment rack and the routers that occupy it is blocked or restricted, or if the
ambient air being drawn into the rack is too warm, an overtemperature condition may occur within
the rack and the routers that occupy it.
• The site should also be as dust-free as possible. Dust tends to clog the router fans, reducing the flow
of cooling air through the equipment rack and the routers that occupy it, thus increasing the risk of
an overtemperature condition.
• Enclosed racks must have adequate ventilation. Ensure that the rack is not congested because each
router generates heat. An enclosed rack should have louvered sides and a fan to provide cooling air.
Heat that is generated by the equipment near the bottom of the rack can be drawn upward into the
intake ports of the equipment above.
• When mounting a chassis in an open rack, ensure that the rack frame does not block the exhaust fans.
• When rack-installed equipment fails, especially equipment in an enclosed rack, try operating the
equipment by itself, if possible. Power off all the other equipment in the rack (and in adjacent racks)
to give the router maximum cooling air and clean power.
• Avoid installing the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router in a
location in which the chassis air intake vents may draw in the exhaust air from adjacent equipment.
Consider how the air flows through the router; the airflow direction is front to back, with ambient
air drawn in from the vents located on the sides of the chassis.
Caution When mounting the router in any type of rack equipment, ensure that the inlet air to the router does not
exceed 70° C.
Air Flow Guidelines for ETSI Rack Installation
To install a Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router in a 2-post or
4-post rack, the front and rear doors of the cabinet must be removed. It is recommended that you
maintain a minimum clearance distance as mentioned below, at all times.
• front clearance—12.7 cm
• rear clearance—10 cm
If you are mounting the chassis in a 4-post enclosed cabinet, ensure that you have a minimum of 10 cm
of clearance on each side of the chassis.
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Chapter 2 Preparing for Installation
Floor Loading Considerations
Ensure that the floor under the rack supporting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Routers is capable of supporting the combined weight of the rack and all the other
installed equipment.
To assess the weight of a fully configured Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router, see the Tab le 1- 3.
For additional information about floor loading requirements, see the GR-63-CORE, Network Equipment
Building System (NEBS) Requirements: Physical Protection document.
Site Power Guidelines
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router have specific power and
electrical wiring requirements. Adhering to these requirements ensures reliable operation of the system.
Follow these precautions and recommendations when planning your site power for the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• The redundant power option provides a second, identical power supply to ensure that power to the
chassis continues uninterrupted if one power supply fails or input power on one line fails.
Site Planning
• Connect each of the two power supplies to a separate input power source. If you fail to do this, your
system might be susceptible to total power failure due to a fault in the external wiring or a tripped
circuit breaker.
• To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and the breakers.
• Check the power at your site before installation, and periodically after installation to ensure that you
are receiving clean power. Install a power conditioner, if necessary.
• Provide proper grounding to avoid personal injury and damage to the equipment due to lightning
striking power lines or due to power surges. The chassis ground must be attached to a central office
or other interior ground system.
Caution This product requires short-circuit (overcurrent) protection to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations.
Note The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router installation must comply
with all the applicable codes, and is approved for use with copper conductors only. The ground
bond-fastening hardware should be of compatible material and preclude loosening, deterioration, and
electrochemical corrosion of hardware and joined material. Attachment of the chassis ground to a central
office or other interior ground system must be made with a 6-AWG gauge wire copper ground conductor
at a minimum.
For information on power specifications, see Table 1-4 .
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Site Planning
Electrical Circuit Requirements
Each Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router requires a dedicated
electrical circuit. If you equip the router with dual-power feeds, provide a separate circuit for each power
supply to avoid compromising the power redundancy feature.
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Routers can be powered by a DC
source or an AC source. Ensure that equipment grounding is present and observe the power-strip ratings.
Make sure that the total ampere rating of all the products plugged into the power strip does not exceed
80% of the rating.
Site Cabling Guidelines
This section contains guidelines for wiring and cabling at your site. When preparing your site for
network connections to the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router,
consider the type of cable required for each component, and the cable limitations. Consider the distance
limitations for signaling, electromagnetic interference (EMI), and connector compatibility. Possible
cable types are fiber, thick or thin coaxial, foil twisted-pair, or unshielded twisted-pair cabling.
Also consider any additional interface equipment you need, such as transceivers, hubs, switches,
modems, channel service units (CSU), or data service units (DSU).
Before you install the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router, have all
the additional external equipment and cables on hand. For information about ordering, contact a Cisco
customer service representative.
Chapter 2 Preparing for Installation
The extent of your network and the distances between the network interface connections depend, in part,
on the following factors:
• Signal type
• Signal speed
• Transmission medium
The distance and rate limits referenced in the following sections are the IEEE-recommended maximum
speeds and distances for signaling purposes. Use this information as a guideline when planning your
network connections prior to installing the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router.
If wires exceed the recommended distances, or if wires pass between buildings, give special
consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by
lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors
to destroy electronic devices. If you have had problems of this sort in the past, you may want to consult
experts in electrical surge suppression and shielding.
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Chapter 2 Preparing for Installation
Asynchronous Terminal Connections
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router provides a console port to
connect a terminal or computer for local console access. The port has an RJ-45 connector and supports
RS-232 asynchronous data with distance recommendations specified in the IEEE RS-232 standard.
Interference Considerations
When wires are run for any significant distance, there is a risk that stray signals will be induced on the
wires as interference. If interference signals are strong, they may cause data errors or damage to the
equipment.
The following sections describe the sources of interference and how to minimize their effects on the
Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router system.
Electromagnetic Interference
All the equipment powered by AC current can propagate electrical energy that can cause EMI and
possibly affect the operation of other equipment. The typical sources of EMI are equipment power cords
and power service cables from electric utility companies.
Strong EMI can destroy the signal drivers and receivers in the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router and even create an electrical hazard by causing power
surges through the power lines into installed equipment. These problems are rare, but could be
catastrophic.
To resolve these problems, you need specialized knowledge and equipment that could consume
substantial time and money. However, you can ensure that you have a properly grounded and shielded
electrical environment, paying special attention to the need for electrical surge suppression.
Site Planning
For information about the electrode magnetic compliance standards supported on the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router, see the Regulatory Compliance and
Safety Information for the Cisco ASR 920 Series Router document.
Radio Frequency Interference
When electromagnetic fields act over a long distance, radio frequency interference (RFI) may be
propagated. Building wiring can often act as an antenna, receiving the RFI signals and creating more
EMI on the wiring.
If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the
plant wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a
high-quality twisted-pair cable with one ground conductor for each data signal.
Lightning and AC Power Fault Interference
If signal wires exceed the recommended cabling distances, or if signal wires pass between buildings, you
should consider the effect that a lightning strike in your vicinity might have on the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router.
The electromagnetic pulse (EMP) generated by lightning or other high-energy phenomena can couple
enough energy into unshielded conductors to damage or destroy electronic equipment. If you have
previously experienced such problems, you should consult with RFI and EMI experts to ensure that you
have adequate electrical surge suppression and shielding of signal cables in your Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router operating environment.
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Site Planning
Rack-Mounting Guidelines
The following sections provide guidelines for rack-mounting the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• Precautions for Rack-Mounting, page 2-16
• Rack Selection Guidelines, page 2-16
• Equipment Rack Guidelines, page 2-17
Precautions for Rack-Mounting
The following rack-mount guidelines are provided to ensure your safety:
• Ensure that the rack is level and stable before extending a component from the rack.
• Ensure that proper airflow is provided to the components in the rack.
• Do not step on or stand on any component or system when servicing other systems or components
in a rack.
• When mounting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router in a
partially filled rack, load the rack from the bottom to the top, with the heaviest component at the
bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing
the unit in the rack.
Chapter 2 Preparing for Installation
Rack Selection Guidelines
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router can be mounted in most
two-post or four-post, 19-inch equipment racks that comply with the Electronic Industries Association
(EIA) standard for equipment racks (EIA-310-D 19-inch). The rack must have at least two posts with
mounting flanges to mount the chassis.
Caution When mounting a chassis in any type of rack equipment, ensure that the inlet air to the chassis does not
exceed 70° C.
The distance between the center lines of the mounting holes on the two mounting posts must be 18.31
inch ± 0.06 inch (46.50 cm ± 0.15 cm). The rack-mounting hardware included with the chassis is
suitable for most 19-inch equipment racks.
Consider installing the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router in a
rack with the following features:
• NEBS-compliant, 19-inch wide (48.3-cm) rack.
• EIA or European Telecommunications Standards Institute (ETSI) hole patterns in the mounting
rails. The required mounting hardware is shipped with the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router. If the rack that you plan to install the system in has
metric-threaded rails, you must provide your own metric-mounting hardware.
• Perforated top and open bottom for ventilation to prevent overheating.
• Leveling feet for stability.
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Caution The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router is not recommended to be
installed in an enclosed rack because the chassis requires an unobstructed flow of cooling air to maintain
acceptable operating temperatures for its internal components. If you use an enclosed rack, ensure that
the air flow requirements are maintained as discussed in Air Flow Guidelines, page 2-10.
Equipment Rack Guidelines
The placement of a rack can affect personnel safety, system maintenance, and the system’s ability to
operate within the environmental characteristics. Choose a proper location for the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router by following the guidelines described
here.
Locating for Safety
If the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router is the heaviest or the only
piece of equipment in the rack, consider installing it at or near the bottom to ensure that the rack’s center
of gravity is as low as possible.
For additional information about the proper placement of electronic equipment, consult the
GR-63-CORE, Network Equipment Building System (NEBS) Requirements: Physical Protection
document.
Site Planning
Locating for Easy Maintenance
It is recommended that you maintain a minimum clearance distance as mentioned below, at all times.
• front clearance—12.7 cm
• rear clearance—10 cm
This space ensures that you can remove the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router components and perform routine maintenance and upgrades easily.
Avoid installing the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router in a
congested rack and consider how routing of cables from other pieces of equipment in the same rack could
affect access to the router cards.
The front and rear of the chassis must remain unobstructed to ensure adequate airflow and prevent
overheating inside the chassis.
To avoid problems during installation and ongoing operations, follow these general precautions when
you plan equipment locations and connections:
• Use the show environment all command regularly to check the internal system status. The
environmental monitor continually checks the interior chassis environment; it provides warnings
about high temperature and creates reports on other potentially dangerous occurrences. If warning
messages are displayed, take immediate action to identify the cause, and correct the problem.
• Keep the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router off the floor and
out of areas that collect dust.
• Follow ESD-prevention procedures to avoid damage to equipment. Damage from static discharge
can cause immediate or intermittent equipment failure.
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Site Planning
Locating for Proper Airflow
Ensure that the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router location has
enough airflow to keep the system operating within the environmental characteristics and the air
temperature is sufficient to compensate for the heat dissipated by the system. For more information, see
the “Air Flow Guidelines” section on page 10.
Installation Checklist
To assist you with your installation and to provide a record of what was done by whom and when,
photocopy the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Installation
Checklist shown in Tabl e 2- 1 . Use this to record the completion and verification of each procedure. After
the checklist is completed, place it in your Site Log along with the other records pertaining to your new
Cisco router.
Table 2-1 Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Installation Checklist
Verified
Task
Date on which chassis received
Chassis and all accessories unpacked
Types and numbers of interfaces verified
Safety recommendations and guidelines reviewed
Installation Checklist copied
Site Log established and background information entered
Site power voltages verified
Site environmental specifications verified
Required passwords, IP addresses, device names, and so on, available
Required tools available
Network connection equipment available
Cable-management brackets installed (optional, but recommended)
AC power cables connected to AC sources and router
DC power cables connected to DC sources and router
Network interface cables and devices connected
System power turned on
System boot complete (STATUS LED is on)
Correct software configuration displayed after system banner appears
By Date
Creating a Site Log
The Site Log provides a record of all the actions related to installing and maintaining the router. Keep it
in an accessible place near the chassis so that anyone who performs tasks has access to it.
Create the Site Log prior to the installation. (See “Site Log” for more information about the Site Log as
well as a sample Site Log that can be used to make copies.)
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1
2
3
2
4
5
Receiving the Router
Each Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router chassis is shipped in a
container that is strapped to a pallet, as illustrated in Figure 2-3 and Figure 2-3.
Figure 2-3 Cisco ASR-920-24SZ-IM Router Packaged for Shipping
Receiving the Router
Label Description Label Description
1 Outside carton for accessories 4 Packing carton
2 Assembly packaging material 5 Carton sealing tape
3 Router — —
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Receiving the Router
Chapter 2 Preparing for Installation
Figure 2-4 Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router Packaged for Shipping
1
2
2
4
Label Description Label Description
1 Outside carton for accessories 4 Packing carton
2 Assembly packaging material 5 Carton sealing tape
3 Router — —
Chassis-Lifting Guidelines
The chassis is not intended to be moved frequently. Before you install the system, ensure that your site
is properly prepared so that you can avoid having to move the chassis later to accommodate power
sources and network connections.
Each time you lift the chassis or any heavy object, follow these guidelines:
3
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• Ensure that your footing is solid, and balance the weight of the chassis between your feet.
• Lift the chassis slowly; never move suddenly or twist your body as you lift.
• Keep your back straight and lift with your legs, not your back. If you must bend down to lift the
chassis, bend at the knees, not at the waist, to reduce the strain on your back muscles.
• Do not remove installed components from the chassis.
• Always disconnect all external cables before lifting or moving the chassis.
Warning
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the
handles on modules (such as power supplies, fans, or cards); these types of handles are not designed
to support the weight of the unit.
Statement 1032
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Chapter 2 Preparing for Installation
Tools and Equipment
You need the following tools and equipment to install and upgrade the router and its components:
• ESD-preventive cord and wrist strap
• Antistatic mat or antistatic foam
• Number 1 and Number 2 Phillips-head screwdrivers
• #12-24 pan-head screws to secure the router to the equipment rack
• Cables for connecting to the network ports (depending on the configuration)
Note For more information about cable specifications, see the Troubleshooting section.
• Ethernet hub, switch, or PC with a network interface card for connecting to the Ethernet ports
• Console terminal (an ASCII terminal or a PC running terminal emulation software) that is
configured for 9600 baud, 8 data bits, no parity, no flow control, and 1stop bit
• Console cable for connecting to the console port
Receiving the Router
• Ratcheting torque screwdriver with a Phillips head that exerts up to 30-pound force per square inch
(in-lb) or 0.02-kilograms force per square millimeter (kgf/mm2) of pressure
• Crimping tool as specified by the ground lug manufacturer
• Wire-stripping tools for stripping both 6-AWG and 14-AWG wires
• Tape measure and level
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Unpacking and Verifying the Shipped Contents
When you receive your chassis, perform the following steps:
Step 1 Inspect the box for any shipping damage. If there is obvious physical damage, contact your Cisco service
representative.
Step 2 Unpack the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router.
Step 3 Perform a visual inspection of the chassis.
Step 4 Use Tab l e 2- 2 to check the contents of the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router shipping container. Do not discard the shipping container. You will need the
container if you move or ship the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M
Router in the future.
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Receiving the Router
Table 2-2 Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Default Shipping Container Contents
Component Description
Chassis Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router chassis
Accessories kit Chassis rack-mount brackets (19-inch EIA) with eight screws
Two cable guides with two screws
One earth lug with two 10-32 screws.
USB Type-A to USB Type-A Male cable
Documentation Cisco ASR 920 Series Router Pointer Card
Optional equipment Check the container for the following optional equipment:
• Power cord if an AC power supply was shipped. There are no cords for the DC
power supply units.
Note Most Cisco documentation is available online. The Cisco ASR 920 Series Router Pointer Card that is
shipped with your Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router contains
links and information about the various documents that are available online.
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Installing
This chapter describes how to install the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router and includes the following sections:
• “Prerequisites” section on page 3-1
• “Installing the Router in a Rack” section on page 3-1
• “Installing the Chassis Ground Connection” section on page 3-44
• “Connecting a Router to the Network” section on page 3-48
Prerequisites
Before installing the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router, it is
important to prepare for the installation by:
• Preparing the site (site planning) and reviewing the installation plans or method of procedures
• Unpacking and inspecting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M
• Gathering the tools and test equipment required to properly install the Cisco ASR 920-24SZ-IM,
CHA P T ER
(MOP). See “Site Planning” section on page 2-8.
Router. See “Receiving the Router” section on page 2-19.
ASR-920-24SZ-M, ASR-920-24TZ-M Router. See “Tools and Equipment” section on page 2-21.
3
For more instructions on how to prepare for the installation of the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router, see Chapter 2, “Preparing for Installation.”
Installing the Router in a Rack
The procedures in this section apply to both horizontal and vertical mounting of the router in a rack:
• “Installing the Chassis Brackets” section on page 3-2
• “Installing the Router Chassis in the Rack” section on page 3-11
• “Attaching the Cable Guides” section on page 3-13
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Installing the Chassis Brackets
The chassis is shipped with mounting brackets that can be installed on the front or rear of the chassis.
To install the brackets on the front of the chassis, perform these steps:
Step 1 Remove the rack-mount brackets from the accessory kit and position them beside the router chassis.
Step 2 Position one of the brackets against the chassis side, and align the screw holes.
19-inch EIA Rack
Figure 3-1 shows how to attach the brackets at the front, middle, and rear positions on the Cisco
ASR-920-24SZ-IM Router for a 19-inch EIA rack.
Figure 3-2 shows how to attach the brackets at the front, middle, and rear positions on the Cisco
ASR-920-24SZ-M, ASR-920-24TZ-M Router for a 19-inch EIA rack.
23-inch Rack
Figure 3-3 shows how to attach the brackets on the Cisco ASR-920-24SZ-IM Router for a 23-inch rack.
Figure 3-4 shows how to attach the brackets on the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
for a 23-inch rack.
300-mm ETSI Rack
Figure 3-5 shows how to attach the brackets on the Cisco ASR-920-24SZ-IM Router for a 300 mm ETSI
rack
Figure 3-7 shows how to attach the brackets on the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
for a 300 mm ETSI rack
Chapter 3 Installing
Figure 3-1 Attaching Mounting Brackets to Cisco ASR-920-24SZ-IM Router for a 19-inch EIA Rack (Front, Middle, and
Rear Positions)
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Installing the Router in a Rack
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Installing the Router in a Rack
Figure 3-2 Attaching Mounting Brackets to Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router for a 19-inch EIA Rack
(Front, Middle, and Rear Positions)
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Installing the Router in a Rack
Figure 3-3 Attaching Mounting Brackets to Cisco ASR-920-24SZ-IM Router for a 23-inch Rack (Front, Middle, and Rear
Positions)
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Installing the Router in a Rack
Figure 3-4 Attaching Mounting Brackets to Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Routerfor a 23-inch Rack (Front,
Middle, and Rear Positions)
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Figure 3-5 Attaching Mounting Brackets to Cisco ASR-920-24SZ-IM Router for a 300 mm ETSI Rack (Front, Middle, and
Rear Positions)
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Installing the Router in a Rack
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Installing the Router in a Rack
Figure 3-6 Attaching Mounting Brackets to Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router for a 300 mm ETSI Rack
(Front, Middle, and Rear Positions)
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Chapter 3 Installing
Installing the Router in a Rack
Step 3 Secure the bracket to the chassis with the screws removed when performing Step 1. The recommended
maximum torque is 10 in.-lb.
Step 4 Repeat Step 3 and Step 3 for the other bracket.
Installing the Router Chassis in the Rack
Note Ensure adequate air flow when mounting the router in a rack. For more information, see the “Ai r F low
Guidelines” section on page 10.
Note Install the cable guides before installing the router in a 19-inch EIA rack. See Attaching the Cable
Guides, page 3-13.
To install the router chassis in the equipment rack, perform these steps:
Step 1 Position the chassis in the rack as follows:
• If the front of the chassis (front panel) is at the front of the rack, insert the rear of the chassis between
the mounting posts.
• If the rear of the chassis is at the front of the rack, insert the front of the chassis between the
mounting posts.
Step 2 Align the mounting holes in the bracket (and optional cable guide) with the mounting holes in the
equipment rack.
The following figure shows how to install the Cisco ASR-920-24SZ-IM Router in a 19-inch EIA rack.
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Figure 3-7 Installing the Cisco ASR-920-24SZ-IM Router in a 19-inch EIA Rack
Chapter 3 Installing
Figure 3-8 Installing the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router in a 19-inch EIA Rack
Step 3
Install the four M6x12mm zinc-plated steel screws through the holes in the bracket and into the threaded
holes in the equipment rack posts.
Step 4 Use a tape measure and level to verify that the chassis is installed straight and level.
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Installing the Router in a Rack
Attaching the Cable Guides
The Cisco ASR-920-24SZ-IM Router supports the following cable guides:
• A920-CBL-GUIDE (left and right)—help in routing the cables from all components on the front
panel thereby enabling a proper cable-bending radius.
Note If the chassis is mounted using 19-inch brackets, you must assemble the cable guides before installing
the chassis on the rack.
To install the cable guides, perform these steps:
Step 1 Position the cable guide-left and cable guide-right against the front of the chassis and align the four
screw holes, as shown in Figure 3-9 for 19-inch rack and Figure 3-10 for other racks using standard kit.
Step 2 Secure the cable guides with the four M6x12mm screws supplied with the cable kit. The recommended
maximum torque is 3N-m.
Figure 3-9 Cable Guide Installation On Cisco ASR-920-24SZ-IM Router For 19-inch Rack Brackets
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Figure 3-10 Installing the Cable Guides on Cisco ASR-920-24SZ-IM Router (As Per the Standard Kit)
Chapter 3 Installing
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Chapter 3 Installing
Wall Mounting the Routers
To install the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router on a wall, follow
the instructions in these procedures:
• Attaching the Brackets to the Router for Wall-Mounting, page 3-15
• Mounting Routers on the Wall, page 3-16
Attaching the Brackets to the Router for Wall-Mounting
Figure 3-11 shows how to attach a 19-inch bracket to the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M
Router.
Wall Mounting the Routers
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Figure 3-11 Attaching 19-inch Brackets on Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router for
Chapter 3 Installing
Wall Mounting
Mounting Routers on the Wall
For the best support of the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router and
cables, ensure the router is attached securely to wall studs or to a firmly attached plywood mounting
backboard.
Warning
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
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Suitable for mounting on and over a concrete or other non-combustible surface only.
Statement 345
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Chapter 3 Installing
392004
1
Step 1 Mount the router with the front panel as shown in the following figures.
Caution When mounting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router vertically,
Caution When mounting the ASR-920-24SZ-1M to a wall, you must install the drip tray (Cisco part number
Step 2 Place the drip tray below the router as shown in Figure 3-12
Step 3 Tighten the four screws to affix the drip tray to the wall.
Wall Mounting the Routers
Figure 3-12 shows the wall installation of Cisco ASR-920-24SZ-IM Router.
Figure 3-13 shows the wall installation of Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router.
ensure that the power supplies are at the bottom.
700-47267-01) as shown below to meet IEC 60950-1 product safety requirements.
To install the drip tray for Cisco ASR-920-24SZ-IM Router, complete the following steps:
Figure 3-12 Mounting the Cisco ASR-920-24SZ-IM Router on the Wall
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Figure 3-13 Mounting the Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router on the Wall
Chapter 3 Installing
1 Drip tray for Cisco ASR-920-24SZ-IM Router
Installing and Removing the Interface Module
The following sections describe the installation and removal of interface module on the Cisco
ASR-920-24SZ-IM Router:
• “Installing the Interface Module” section on page 3-19
• “Removing the Interface Module” section on page 3-20
• “Hot-Swapping the Interface Module” section on page 3-21
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Installing the Interface Module
Note Before installing the interface module, read the Activating or Deactivating Interface Module section
in the Cisco ASR 920 Series Aggregation Services Router Configuration Guide.
Step 1 Before inserting an interface module, make sure that the chassis is grounded.
Step 2 If present, remove the blank filler plate covering the interface module slot. To remove, pull the blank
filler plate completely out of the router slot using the captive screws.
Step 3 To insert the interface module, carefully align the edges of the interface module between the upper and
lower edges of the interface module slot in the router.
Step 4 Carefully slide the interface module into the router slot until the interface module makes contact with
the backplane. Figure 3-14 shows how to install the interface module on Cisco ASR-920-24SZ-IM
Router.
Figure 3-14 Inserting an Interface Module on Cisco ASR-920-24SZ-IM Router
Installing and Removing the Interface Module
Step 5 Tighten the locking thumbscrews on both sides of the interface module. The recommended maximum
torque is 5.5 in.-lb (.62 N-m).
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Installing and Removing the Interface Module
Step 6 Connect all the cables to each interface module.
Caution Do not use interface module or power supply ejector handles to lift the chassis; using these handles to
lift the chassis can deform or damage the handles.
Removing the Interface Module
Note Before removing the interface module, read the Activating or Deactivating Interface Module section
in the Cisco ASR 920 Series Aggregation Services Router Configuration Guide.
Step 1 To remove an interface module, disconnect all the cables from each interface module.
Step 2 Loosen the locking thumbscrews on both sides of the interface module.
Step 3 Slide the interface module out of the router slot by pulling on the handles.
If you are removing a blank filler plate, pull the blank filler plate completely out of the router slot using
the captive screws.
Chapter 3 Installing
Note If the interface module slot is to remain empty, install a blank filler plate (Cisco part number
800-35323-01) over the opening, and secure it with captive installation screws.
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Installing and Removing the Interface Module
Figure 3-15 Removing an Interface Module from Cisco ASR-920-24SZ-IM Router
392013
Hot-Swapping the Interface Module
Note Before hot-swapping the interface module, read the Activating or Deactivating Interface Module
section in the Cisco ASR 920 Series Aggregation Services Router Configuration Guide.
The Cisco ASR-920-24SZ-IM Router provides a feature that allows you to remove and replace an
interface module without powering down the router. This feature, called hot-swapping or Online
Insertion and Removal (OIR), allows you to remove and replace an interface module without disrupting
router operation.
Caution The Cisco ASR-920-24SZ-IM Router does not support hot-swapping or OIR of TDM IM. To activate a
TDM IM you must reload the router. Without reloading the router, the IM or associated front panel ports
cannot be used. If reload is aborted, the ports 20 to 23 remain disabled and IM remains in Out-of-Service
(OOS) state until next reload.
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Installing and Removing the Fan Tray
When you remove or insert an interface module while the router is powered on and running, the router
does the following:
1. Determines if there is sufficient power for the module.
2. Scans the backplane for configuration changes.
3. Initializes the newly inserted module.
4. Places any previously configured interfaces on the module back to the state they were in when they
were removed.
The router runs diagnostic tests on any new interfaces and the test results indicate the following:
• If the tests are successful it means the router is operating normally.
• If the new module is faulty, the router resumes normal operation, but leaves the new interfaces
disabled.
• If the diagnostic tests fail, the router stops operating, which usually indicates that the new module
has a problem in the bus and should be removed.
Caution To avoid erroneous failure messages, note the current configuration of all the interfaces before
Chapter 3 Installing
you remove or replace an interface module, and allow at least 2 minutes for the system to
reinitialize after a module has been removed or replaced. This time is recommended in order
to allow for synchronization between components within the interface module and for
synchronization with the RSP.
Installing and Removing the Fan Tray
The following sections describe the installation and removal of fan tray on the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• “Installing the Fan Tray” section on page 3-22
• “Removing the Fan Tray” section on page 3-24
Installing the Fan Tray
The fan tray is a modular unit that provides cooling to the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router. Follow these steps to install the fan tray in the chassis:
Step 1 Guide the fan tray into the chassis until it is fully seated. Figure 3-16 and Figure 3-17 show how to orient
the fan tray for Cisco ASR-920-24SZ-IM Router and Cisco ASR-920-24SZ-M, ASR-920-24TZ-M
Router respectively.
Caution Keep your fingers, clothing, and jewelry away from the fans. Always handle the fan tray by
the handle.
Step 2 Secure the fan tray to the chassis using the attached captive installation screws. The recommended
maximum torque is 5.5 in.-lb (.62 N-m).
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Installing and Removing the Fan Tray
Figure 3-16 Installing the Fan Tray on Cisco ASR-920-24SZ-IM Router
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Figure 3-17 Installing the Fan Tray on Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
Chapter 3 Installing
This completes the procedure for installing or replacing the fan tray in a Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router.
For more information about air flow guidelines, see the “Air Flow Guidelines” section on page 2-10.
Removing the Fan Tray
The fan tray supports online insertion and removal (OIR). There is no need to power down the Cisco
ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router to remove or replace the fan tray.
However, the router will shut down if the fan tray is removed from the chassis for more than five minutes.
Caution The router can stay active for up to 5 minutes if the temperature is below the ambient limit. However, in
the event of an overtemperature alarm, the router can shut down in less than 5 minutes. In the event of a
critical temperature alarm, the router shuts down immediately.
Caution To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after the fan
tray has been removed or replaced.
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Chapter 3 Installing
Step 1 Using a No. 2 Phillips screwdriver or your fingers, loosen the captive installation screws that secures the
Installing and Removing the Fan Tray
Follow these steps to remove and replace the fan tray on the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
fan tray to the chassis. Figure 3-18 shows the front of the Cisco ASR-920-24SZ-IM Router fan tray,
including the captive installation screws. Figure 3-19 shows the front of the Cisco ASR-920-24SZ-M,
ASR-920-24TZ-M Router fan tray, including the captive installation screws.
Figure 3-18 Removing the Fan Tray From Cisco ASR-920-24SZ-IM Router
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Figure 3-19 Removing the Fan Tray From Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
Chapter 3 Installing
3-26
Caution Keep your fingers, clothing, and jewelry away from the fans. Always handle the fan tray by
the handle.
Step 2 Pull the fan tray towards you, no more than 1 inch, to disengage it from the power receptacle on the
midplane.
Warning
The fans might still be turning when you remove the fan assembly from the chassis. Keep
fingers, screwdrivers, and other objects away from the openings in the fan assembly’s
housing.
Step 3 Wait at least 5 seconds to allow the fans to stop spinning. Then, pull the fan tray backward towards you
Statement 263
and out of the chassis.
Note As the fan tray slides out of the chassis, support the bottom of the fan tray with one hand and
keep your other hand on the fan tray handle.
This completes the steps for removing the fan tray from the chassis.
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To install a new fan tray, follow the steps in the “Installing the Fan Tray” section on page 3-22.
Installing the Power Supply
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router provides the choice of two
different power supplies:
• DC power—-48 V/60 Vdc or 24 Vdc
The DC power supply uses 2 position terminal block-style connector. The terminal block connector
is of suitable size to carry the appropriate AWG wire size to handle the input current of the power
supply. ON/OFF switch is provided.
• AC power—100 VAC to 240 VAC
The AC power supply has an IEC 320-type power receptacle and a 15-A service connector. You can
use standard straight power cords with the AC power supply. The power supply includes a power
cord retainer clip that can only accept straight power cords. No ON/OFF switch is provided.
Each power supply provides a single primary input power connection. You can install dual-power
supplies for redundancy.
Installing the Power Supply
Warning
Note Products that have an AC power connection are required to have an external surge protective device
Read the installation instructions before connecting the system to the power source.
Statement 1004
(SPD) provided as part of the building installation to comply with the Telcordia GR-1089 NEBS
standard for electromagnetic compatibility and safety.
Caution Do not use interface module or power supply ejector handles to lift the chassis; using these handles to
lift the chassis can deform or damage the handles.
The following sections provide more information on the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router power supplies:
• “Preventing Power Loss” section on page 3-28
• “Power Connection Guidelines” section on page 3-28
• “Installing a DC Power Supply” section on page 3-29
• “Removing and Replacing a DC Power Supply” section on page 3-32
• “Installing an AC power Supply” section on page 3-34
• “Removing and Replacing an AC Power Supply” section on page 3-36
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Preventing Power Loss
Use the following guidelines to prevent power loss to the router:
• To prevent loss of input power, ensure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and breakers.
• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
that use ferroresonant technology. These UPS types can become unstable with systems such as the
Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router, which can have
substantial current-draw fluctuations due to bursty data traffic patterns.
Power Connection Guidelines
This section provides guidelines for connecting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router power supplies to the site power source.
Chapter 3 Installing
Warning
Warning
Warning
This equipment is intended to be grounded to comply with emission and immunity requirements.
Ensure that the switch functional ground lug is connected to earth ground during normal use.
Statement 1064
The plug-socket combination must be accessible at all times, because it serves as the main
disconnecting device.
This product requires short-circuit (overcurrent) protection, to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations.
Guidelines for DC-Powered Systems
Basic guidelines for DC-powered systems include the following:
• Each chassis power supply should have its own dedicated input power source. The source must
comply with the safety extra-low voltage (SELV) requirements in the UL 60950, CSA 60950, EN
60950, and IEC 60950 standards.
• The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be
sized according to the power supply input rating and local or national code requirements.
• The circuit breaker is considered the disconnect device and should be easily accessible.
• The system ground is the power supply and chassis ground.
• Do not connect the DC return wire to the system frame or to the system-grounding equipment.
Statement 1019
Statement 1045
• Use the grounding lug to attach a wrist strap for ESD protection during servicing.
Guidelines for AC-Powered Systems
Basic guidelines for AC-powered systems include the following:
• Each chassis power supply should have its own dedicated branch circuit.
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• The circuit breaker should be sized according to the power supply input rating and local or national
code requirements.
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
Installing a DC Power Supply
The following sections describe how to install a DC power supply in the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• “Installing a DC Power Supply Module” section on page 3-29
• “Attaching Cables to the DC Power Supply” section on page 3-30
• “Removing and Replacing a DC Power Supply” section on page 3-32
Note This equipment is suitable for installation in Network Telecommunications Facilities and locations
where the NEC applies. The equipment is suitable for installation as part of the Common Bonding
Network (CBN).
Installing the Power Supply
Caution The grounding architecture of this product is DC-isolated (DC-I) for DC-powered products.
DC-powered products have a nominal operating DC voltage of 48 VDC. Minimal steady state DC
operating voltage is 19.2 VDC.
Installing a DC Power Supply Module
Perform the following procedure to install a power supply module:
Step 1 Ensure that the system (earth) ground connection has been made. For ground connection installation
instructions, see the “Installing the Chassis Ground Connection” section on page 3-44.
Step 2 If present, remove the blank power supply filler plate from the chassis power supply bay opening by
loosening the captive installation screws.
Step 3 Verify that power to the DC circuit connected to the power supply you are installing is off. To ensure that
power has been removed from the DC circuits, locate the circuit breakers for the DC circuits, switch the
circuit breakers to the OFF position, and tape the circuit-breaker switches in the OFF position.
Step 4 Grasp the power supply metal tab with one hand. Place your other hand underneath the power supply.
Slide the power supply into the power supply bay as shown in Figure 3-20. Make sure that the power
supply is fully seated in the bay.
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Figure 3-20 Installing a DC Power Supply
Chapter 3 Installing
Step 5
Tighten the captive installation screw of the power supply. The recommended maximum torque is 5.5
in.-lb (.62 N-m).
If you are installing a redundant DC power supply, repeat these steps for the second power source too.
Attaching Cables to the DC Power Supply
Note When installing DC power supply, use 14 AWG, 90°C wires. Always ensure that the building’s
installation for short-circuit (overcurrent) protection does not exceed 15A.
To attach the DC power supplies:
Step 1 Open the DC power supply guard.
Step 2 Attach the DC supply wires in the designated screws. See Figure 3-21.
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Installing the Power Supply
Figure 3-21 Connecting the DC Power Supply Wires
Step 3
Close the DC power supply guard.
Powering On the Router
After the router is either rack mounted or mounted on the wall, perform these tasks to complete the
installation:
Step 1 Power on the router. See Figure 3-22
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1
Figure 3-22 Powering on the Router
Step 2 Connect the front-panel ports. See the Connecting to SFP Modules, page 3-43 to complete the
installation.
Chapter 3 Installing
1 power on/off switch
Removing and Replacing a DC Power Supply
This section provides information about removing and replacing a DC power supply in the Cisco ASR
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router.
Note The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router power supplies are
hot-swappable. If you have installed redundant power supplies, you can replace a single power supply
without interrupting power to the router.
Caution To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after a power
supply has been removed or replaced.
Warning
Warning
When installing or replacing the unit, the ground connection must always be made first and
disconnected last.
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Statement 1046
3-32
Warning
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
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Installing the Power Supply
Warning
Installation of the equipment must comply with local and national electrical codes.
Statement 1074
Follow these steps to remove and replace the DC power supply on the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
Step 1 Before servicing the power supply, switch off the circuit breaker in your equipment area. As an
additional precaution, tape the circuit-breaker switch in the Off position.
Step 2 Slip on the ESD-preventive wrist strap that was included in the accessory kit.
Step 3 Switch the power supply circuit-breaker switch to the Off (O) position.
Step 4 Pull the terminal block plug connector out of the terminal block head in the power supply.
Step 5 Loosen the captive screw on the DC power supply. See Figure 3-23.
Figure 3-23 Removing a DC Power Supply
Caution Do not use the captive installation screw to pull out the power supply.
Step 6 Grasping the power supply handle with one hand, pull the power supply out from the chassis while
supporting it with the other hand.
Step 7 Replace the DC power supply within 5 minutes. See Figure 3-20. If the power supply bay is to remain
empty, install a blank filler plate (Cisco part number 800-39165-01) over the opening, and secure it with
captive installation screws.
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Installing an AC power Supply
The following sections describe how to install an AC power supply in the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
• “Installing an AC Power Supply Module” section on page 3-34
• “Activating an AC Power Supply” section on page 3-48
• “Removing and Replacing an AC Power Supply” section on page 3-36
Chapter 3 Installing
Warning
This product requires short-circuit (over current) protection, to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations.
Installing an AC Power Supply Module
Follow these steps to install an AC power supply module:
Step 1 Ensure that the system (earth) ground connection has been made. For ground connection installation
instructions, see the “Installing the Chassis Ground Connection” section on page 3-44.
Step 2 If necessary, remove the blank power supply filler plate from the chassis power supply bay opening, by
loosening the captive installation screws.
Step 3 Grasp the power supply handle with one hand. Place your other hand underneath the power supply, as
shown in Figure 3-24. Slide the power supply into the power supply bay. Make sure that the power
supply is fully seated in the bay.
Figure 3-24 Installing the AC Power Supply
Statement 1045
3-34
Step 4
Tighten the captive installation screw of the power supply. The recommended maximum torque is 5.5
in.-lb (.62 N-m).
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Installing the Power Supply
Warning
Power supply captive installation screws must be tight to ensure protective grounding continuity.
Statement 289
Activating an AC Power Supply
Follow these steps to activate an AC power supply:
Step 1 Attach the AC power retainer cord as shown in the figure below.
Figure 3-25 Attaching the AC Power Retainer Cord
Step 2
Step 3 Push the retainer cord towards the power supply cord to lock it in place as shown in the figure below.
Lift the power retainer and plug in the AC power supply.
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1
2
3
392005
Figure 3-26 Locking the Power Retainer Cord
Chapter 3 Installing
Step 4 Connect the other end of the power cord to an AC-input power source.
Step 5 Verify power supply operation by checking that the power supply LED is green.
Step 6 If the LEDs indicate a power problem, see “LED Indicators” section on page 1-13 for troubleshooting
information.
Step 7 If you are installing a redundant power supply, repeat these steps for the second power source.
Note If you are installing a redundant AC power supply, ensure that each power supply is connected to a
separate power source in order to prevent power loss in the event of a power failure.
Removing and Replacing an AC Power Supply
This section describes how to remove and replace an AC power supply.
Note The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router power supplies are
hot-swappable. If you have installed redundant power supplies, you can replace a single power supply
without interrupting power to the router.
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Caution To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after a power
Installing the Power Supply
supply has been removed or replaced.
Warning
When you install the unit, the ground connection must always be made first and disconnected last.
Statement 1046
Warning
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning
Installation of the equipment must comply with local and national electrical codes.
Statement 1074
Follow these steps to remove and replace an AC power supply:
Step 1 Disconnect the power cord from the power source. Do not touch the metal prongs on the power cord
when it is still connected to the power supply.
Step 2 Remove the power cord from the power connection on the power supply. Do not touch the metal prongs
embedded in the power supply.
Step 3 Loosen the captive installation screw as shown in the figure below.
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Figure 3-27 Removing the AC Power Supply
Chapter 3 Installing
392033
Caution Do not use the captive installation screw or the power retainer to pull out the power supply.
Step 4 Grasp the AC power supply metal tab with one hand, and slide it part of the way out of the chassis. Place
your other hand underneath the power supply, and slide it completely out of the chassis. See Figure 3-24.
Step 5 Replace the AC power supply within 5 minutes. See Figure 3-24. If the power supply bay is to remain
empty, install a blank filler plate (Cisco part number 800-39165-01) over the opening, and secure it with
captive installation screws.
Installing and Removing SFP Modules
These sections describe how to install and remove SFP modules. The modules are inserted into the SFP
module slots as depicted in Figure 3-30. These field-replaceable modules provide interfaces.
See the Supported PIDs for the list of SFP modules that the router supports. Each port must match the
wavelength specifications on the other end of the cable. For reliable communications, the cable must not
exceed the stipulated cable length.
Use only Cisco SFP modules on the Cisco router. Each SFP module has an internal serial EEPROM that
is encoded with security information. This encoding provides a way for Cisco to identify and validate
that the SFP module meets the requirements for the router.
For detailed instructions on installing, removing, and cabling the SFP module, see the SFP module
documentation.
Installing SFP Modules
Figure 3-28 shows an SFP module that has a bale-clasp latch.
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Caution We strongly recommend that you do not install or remove fiber-optic SFP modules with cables attached
Installing and Removing SFP Modules
because of the potential damage to the cables, the cable connector, or the optical interfaces in the SFP
module. Disconnect all cables before removing or installing an SFP module.
Removing and installing an SFP module can shorten its useful life. Do not remove and insert SFP
modules more often than is absolutely necessary.
Figure 3-28 SFP Module with a Bale-Clasp Latch
To insert an SFP module into the module slot, follow these steps:
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.
Some SFP modules identify the top side of the module with send (TX) and receive (RX) markings or
arrows that show the direction of the connection.
Step 2 If the SFP module that you are using has the markings, use them to identify the top side of the module.
Step 3 Align the SFP module in front of the slot opening.
Step 4 Insert the SFP module into the slot until you feel the connector on the module snap into place in the rear
of the slot. See Figure 3-29 for installing SFP Module with a Bale-Clasp Latch and Figure 3-30 for
installing SFP Module without a Bale-Clasp Latch.
Figure 3-29 Installing an SFP Module with a Bale-Clasp Latch into an SFP Module Slot on Cisco
ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router
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Chapter 3 Installing
Figure 3-30 Installing an SFP Module without a Bale- Cl asp La tch in to an SF P Modu le Slo t on Ci sco
ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router
392061
Caution Do not remove the dust plugs from the fiber-optic SFP module port or the rubber caps from the
fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the SFP module
ports and cables from contamination and ambient light. Store the dust plugs for later use.
Step 5 Insert the cable connector into the SFP module:
3-40
• For fiber-optic SFP modules, insert the LC cable into the SFP module.
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• For copper 1000BASE-T SFP modules, insert the RJ-45 cable connector into the SFP module.
Removing SFP Modules
To remove an SFP module from a module receptacle, follow these steps:
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.
Step 2 Disconnect the cable from the SFP module, and insert a dust plug into the cable end.
Tip For reattachment, note which cable connector plug is send (TX) and which is receive (RX).
Step 3 SFP module with Bale-Clasp Latch—Pull the bale out and down to eject the module as shown in
Figure 3-31. If the bale-clasp latch is obstructed and you cannot use your index finger to open it, use a
small, flat-blade screwdriver or other long, narrow instrument to open the bale-clasp latch.
SFP module without Bale-Clasp Latch—Use the extraction tool to remove the SFP by inserting the
tool into the side of the SFP module and pulling it out of the module as shown in Figure 3-32.
Installing and Removing SFP Modules
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Figure 3-31 Removing a SFP Module with Bale-Clasp Latch From Cisco ASR 920-24SZ-IM,
Chapter 3 Installing
ASR-920-24SZ-M, ASR-920-24TZ-M Router
Step 4
Figure 3-32 Removing a SFP Module without Bale-Clasp Latch From Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router
392062
Grasp the SFP module between your thumb and index finger, and carefully remove it from the module
slot.
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Step 5 For fiber-optic SFP modules, insert a dust plug into the optical ports of the SFP module to keep the
optical interfaces clean.
Step 6 Place the removed SFP module in an antistatic bag or other protective environment.
Connecting to the 10/100/1000 Ports
Note The router 10/100/1000 ports configure themselves to operate at the speed of attached devices. If the
attached ports do not support autonegotiation, you can explicitly set the speed and duplex parameters.
Connecting devices that do not autonegotiate or that have their speed and duplex parameters manually
set can reduce performance or result in no linkage.
To maximize performance, choose one of these methods for configuring the Ethernet ports:
• Let the ports autonegotiate both speed and duplex.
• Set the port speed and duplex parameters on both ends of the connection.
Connecting to the 10/100/1000 Ports
Step 1 When connecting to workstations, servers, and routers, connect a straight-through cable to an RJ-45
connector on the front panel.When connecting to routers or repeaters, use a crossover cable.
Note You can use the mdix auto interface configuration command in the CLI to enable the automatic
medium-dependent interface crossover (auto-MDIX) feature. When the auto-MDIX feature is enabled,
the router detects the required cable type for copper Ethernet connections and configures the interfaces
accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a
copper 10/100/1000, or an SFP module port on the router, regardless of the type of device on the other
end of the connection.
Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on
when both the router and the connected device have established link.
If the port LED does not turn on, the device at the other end might not be turned on, or there might be a
cable problem or a problem with the adapter installed in the attached device.
Note On user network interface (UNI) ports, the port LED is green after the link is established.
Step 3 Reconfigure and reboot the connected device, if necessary.
Step 4 Repeat Steps 1 through 3 to connect each device.
Connecting to SFP Modules
This section describes how to connect to SFP modules. For instructions on how to connect to fiber-optic
SFP modules, see the Connecting to Fiber-Optic SFP Modules, page 3-44.
For instructions about how to install or remove an SFP module, see the Installing and Removing SFP
Modules, page 3-38.
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1
391971
Connecting to Fiber-Optic SFP Modules
Follow these steps to connect a fiber-optic cable to an SFP module:
Chapter 3 Installing
Warning
Caution Do not remove the rubber plugs from the SFP module port or the rubber caps from the fiber-optic cable
Class 1 laser product.
Statement 1008
until you are ready to connect the cable. The plugs and caps protect the SFP module ports and cables
from contamination and ambient light.
Step 1 Remove the rubber plugs from the module port and fiber-optic cable, and store them for future use.
Step 2 Insert one end of the fiber-optic cable into the SFP module port.
Step 3 Insert the other cable end into a fiber-optic connector on a target device.
Step 4 Observe the port status LED.
The LED turns green when the router and the target device have an established link.
If the LED is off, the target device might not be turned on, there might be a cable problem, or there might
be problem with the adapter installed in the target device.
Step 5 If necessary, reconfigure and restart the router or target device.
Installing the Chassis Ground Connection
Before you connect the power or turn on the power to the Cisco ASR-920-24SZ-IM Router, you must
provide an adequate chassis ground (earth) connection to your router.
This section describes how to ground the Cisco ASR-920-24SZ-IM Router chassis. The grounding lug
location is on the back panel of the router.
Tip Ensure that the grounding lug wire does not cover the fan opening.
Figure 3-33 Attaching a Grounding Lug to the Rear of the Cisco ASR-920-24SZ-IM Router
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1 Grounding lugs 2 Fan status LED
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21
391973
Installing the Chassis Ground Connection
Figure 3-34 Attaching a Grounding Lug to the Rear of the Cisco ASR-920-24SZ-M,
ASR-920-24TZ-M Router
1 Grounding lugs 2 Fan status LED
To ensure that the chassis ground connection that you provide is adequate, you need the following parts
and tools:
• Ratcheting torque screwdriver with Phillips head that exerts up to 15 in.-lb (1.69 N-m) of torque for
attaching the ground wire to the router
• Crimping tool as specified by the ground lug manufacturer
• 6-AWG or larger copper wire for the ground wire
• Wire-stripping tools appropriate to the wire you are using
Warning
Warning
Warning
Caution Before making connections to the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router, ensure that you disconnect the power at the circuit breaker.
Otherwise, severe injury to you or damage to the router may occur.
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Use copper conductors only.
Statement 1025
Statement 1024
When installing or replacing the unit, the ground connection must always be made first and
disconnected last.
Statement 1046
This unit is to be installed in a restrictive access location and must be permanently grounded to a
minimum 6-AWG copper ground wire.
Perform the following procedure to ground the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router using a 2-hole lug and the corresponding mounting point. Most carriers
require a minimum 6-AWG ground connection. Verify your carrier’s requirements for the ground
connection.
Step 1 If your ground wire is insulated, use a wire-stripping tool to strip the ground wire to 0.5 inch ± 0.02 inch
(12.7 mm ±0.5 mm) (Figure 3-35).
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Insulation
Wire lead
0.5 in. (12.7 mm) ± 0.02 in. (0.5 mm)
60528
60529
Figure 3-35 Stripping a Ground Wire
Step 2 Slide the open end of your 2-hole ground lug over the exposed area of the ground wire.
Step 3 Using a crimping tool (as specified by the ground lug manufacturer), crimp the ground lug to the ground wire
as shown in Figure 3-36.
Figure 3-36 Crimping a Ground Lug on to the Ground Wire
Chapter 3 Installing
Step 4 Use a Phillips head screwdriver to attach the 2-hole ground lug and wire assembly to the router with the
2 pan-head Phillips head screws.
Step 5 Connect the other end of the ground wire to a suitable grounding point at your site.
Power Connection Guidelines
This section provides guidelines for connecting the Cisco ASR 920 Series Aggregation Services Router
power supplies to the site power source.
• Preventing Power Loss, page 3-47
• Activating a DC Power Supply, page 3-48
• Activating an AC Power Supply, page 3-48
Warning
This equipment is intended to be grounded to comply with emission and immunity requirements.
Ensure that the switch functional ground lug is connected to earth ground during normal use.
Statement 1064
3-46
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Installing the Chassis Ground Connection
Warning
Warning
The plug-socket combination must be accessible at all times because it serves as the main
disconnecting device.
This product requires short-circuit (overcurrent) protection, to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations.
Guidelines for DC-Powered Systems
Basic guidelines for DC-powered systems include the following:
• Each chassis power supply should have its own dedicated input power source. The source must
comply with the safety extra-low voltage (SELV) requirements in the UL 60950, CSA 60950, EN
60950, and IEC 60950 standards.
• The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be
sized according to the power supply input rating and local or national code requirements.
• The circuit breaker is considered the disconnect device and should be easily accessible.
• The system ground is the power supply and chassis ground.
• Do not connect the DC return wire to the system frame or to the system-grounding equipment.
• Use the grounding lug to attach a wrist strap for ESD protection during servicing.
• Ensure the DC return is grounded at the source side.
Statement 1019
Statement 1045
Guidelines for AC-Powered Systems
Basic guidelines for AC-powered systems include the following:
• Each chassis power supply should have its own dedicated branch circuit.
• The circuit breaker should be sized according to the power supply input rating and local or national
code requirements.
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding
conductors that connect to the receptacles should connect to protective earth ground at the service
equipment.
Preventing Power Loss
Use the following guidelines to prevent power loss to the router:
• To prevent loss of input power, ensure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and breakers.
• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
that use ferroresonant technology. These UPS types can become unstable with systems such as the
Cisco ASR 920 Series Router, which can have substantial current-draw fluctuations due to bursty
data traffic patterns.
Use the information in the Table 1-3 to estimate the power requirements and heat dissipation of a
Cisco ASR 920 Series Router based on a given configuration of the router. Determining power
requirements is useful for planning the power distribution system needed to support the router.
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
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Connecting a Router to the Network
Activating a DC Power Supply
Perform the following procedure to activate a DC power supply:
Step 1 Remove the tape from the circuit-breaker router handle, and restore power by moving the circuit-breaker
router handle to the On (|) position.
Step 2 Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1)
is green.
Step 3 If the LEDs indicate a power problem, see Chapter 5, “Troubleshooting.”
Step 4 If you are connecting a redundant DC power supply, repeat these steps for the second power source.
Note If you are connecting a redundant DC power supply, ensure that each power supply is connected to a
separate power source in order to prevent power loss in the event of a power failure.
Activating an AC Power Supply
Chapter 3 Installing
Perform the following procedure to activate an AC power supply:
Step 1 Plug the power cord into the power supply.
Step 2 Connect the other end of the power cord to an AC-input power source.
Step 3 Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1)
is green.
Step 4 If the LEDs indicate a power problem, see Chapter 5, “Troubleshooting” for troubleshooting
information.
Step 5 If you are connecting a redundant AC power supply, repeat these steps for the second power source.
Note If you are connecting a redundant AC power supply, ensure that each power supply is connected to a
separate power source in order to prevent power loss in the event of a power failure.
Connecting a Router to the Network
The following sections describe how to connect a Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router to the network:
• Connecting Console Cables, page 3-49
• Connecting a Management Ethernet Cable, page 3-53
3-48
• Installing and Removing SFP and SFP+ Modules, page 3-54
• Connecting a USB Flash Device, page 3-54
• Connecting Timing Cables, page 3-55
• Connecting Ethernet Cables, page 3-57
• Connecting Cables to SFP Modules, page 3-58
• Connector and Cable Specifications, page 3-58
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
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