Cisco UBR7246VXR Installation Manual
Universal broadband router
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Cisco Cable Clock Card Hardware
Installation Guide for the Cisco
uBR7246VXR Universal Broadband Router
Product Numbers: UBR-CLK-T1(=)
Platforms Supported: Cisco uBR7246 VXR
Americas Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 527-0883
Text Part Number: OL-26705-01
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Table of Contents
Related Manuals for Cisco UBR7246VXR
Summary of Contents for Cisco UBR7246VXR
- Page 1 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router Product Numbers: UBR-CLK-T1(=) Platforms Supported: Cisco uBR7246 VXR Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387)
- Page 2 OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks.
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Page 3: Table Of Contents
Warnings and Cautions Clock Card Removal and Installation Cisco uBR7246 VXR—Removing a Clock Card Cisco uBR7246 VXR—Installing a Clock Card Connecting a Clock Card Interface Cable Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246 VXR Universal Broadband Router OL-26705-01... - Page 4 Minimum Software Requirements Configuration and Diagnostic Cisco IOS Commands for the Clock Card Clock Source Paths A P P E N D I X Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246 VXR Universal Broadband Router OL-26705-01...
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Page 5: Preface
Obtaining Documentation and Submitting a Service Request, page vi • Objectives This document describes how to install and configure the Cisco Cable Clock Card field-replaceable unit used in the Cisco uBR7246 VXR universal broadband router. Organization This document contains the following chapters:... - Page 6 Cisco technical documentation, at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html Subscribe to the What’s New in Cisco Product Documentation as an RSS feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service. Cisco currently supports RSS Version 2.0.
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Page 7: Clock Card Overview
DB-15 interfaces on the front of the clock card connect to external T1 clock signal sources. When installed in the Cisco uBR7246 VXR chassis, the clock card can propagate a national clock signal throughout the router’s midplane by locking onto an external T1 signal originating over the PSTN, locking onto a T1 clock signal originating from a port adapter installed in the same chassis, or by connecting to a Global Positioning System (GPS) receiver generating a T1 clock signal. -
Page 8: Clock Source Overview
There are three methods used to acquire and distribute both the primary and secondary national clock sources on the Cisco uBR7246 VXR. Using one of these three methods, the clock card can propagate a national clock signal throughout the chassis midplane to a supported cable interface line card, thus synchronizing communications over all cable interfaces in the Cisco uBR7246 VXR to other routers. -
Page 9: Interface Specifications And Pinouts
25 seconds. Holdover mode provides a reliable Stratum 3 clock to the Cisco uBR7246 VXR for up to 72 hours after a loss of external service. -
Page 10: Leds
Receive Ring Transmit Ring 1. Any pins not described in this table are not connected. Cisco provides DSU/CSU cables. You can use a DA-15 female to pigtail cable, 24.6 feet (7.5 Note m), CAB-SDS6 cable, COM-T1Product Number. For pinouts, refer to: http://www.cisco.com/univercd/cc/td/doc/product/core/cis7505/ipicg/... -
Page 11: Clock Card Location In The Cisco Ubr7246 Vxr Chassis
Clock Card Location in the Cisco uBR7246 VXR Chassis The chassis slot of the Cisco uBR7246 VXR chassis into which the clock card can be installed is on the left side of the chassis immediately below port adapter slot 1. - Page 12 Fan tray handle uBR - MCI6 Cable interface uBR - MCI6 line cards Captive uBR - MCI6 installation screws uBR - MCI6 Cable F connectors Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01...
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Page 13: Chapter 2 Preparing For Installation
FCC Class A Compliance, page 2-4 • Required Tools and Equipment You need the following tools and parts to install a Cisco Cable Clock Card. If you need additional equipment, contact a service representative for ordering information. • Cisco uBR7246 VXR universal broadband router •... -
Page 14: Safety Guidelines
Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde. Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01... -
Page 15: Electrical Equipment Guidelines
Do not perform any action that creates a potential hazard to people or makes the equipment unsafe; • carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds. Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01... -
Page 16: Preventing Electrostatic Discharge Damage
You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures: Turn the television or radio antenna until the interference stops. -
Page 17: Chapter 3 Removing And Installing The Clock Card
C H A P T E R Removing and Installing the Clock Card This chapter describes how to remove the Cisco Cable Clock Card from a Cisco uBR7246 VXR and also how to install a new or replacement clock card. This chapter contains the following sections: Installation Overview, page 3-1 •... -
Page 18: Handling The Clock Card
The Cisco uBR7246 VXR supports online insertion and removal (OIR), however, the clock card cannot be “hot-swapped” in the chassis. You must power down the Cisco uBR7246 VXR when removing and/or replacing a clock card. Removing the clock card from the chassis before powering off will cause the router to crash. -
Page 19: Clock Card Removal And Installation
This section contains the following illustrations: Cisco uBR7246 VXR—Removing a Clock Card, page 3-4 • • Cisco uBR7246 VXR—Installing a Clock Card, page 3-5 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01... -
Page 20: Cisco Ubr7246 Vxr-Removing A Clock Card
If the clock card will be returned to the factory, immediately place it in a static shielding bag. ACTIVE FAULT HOLDOVER FREERUN ENABLE Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01... -
Page 21: Cisco Ubr7246 Vxr-Installing A Clock Card
FREERUN ENABLE on the clock card. Step 5 Connect the DB-15 T1 cable(s) to the front of the clock card. ACTIVE FREERUN FAULT ENABLE HOLDOVER Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01... -
Page 22: Connecting A Clock Card Interface Cable
Connecting a Clock Card Interface Cable Connecting a Clock Card Interface Cable You can use up to two DB-15 T1 connections on the clock card. They are available from Cisco Systems and outside commercial cable vendors. To connect DB-15 T1 cables to the clock card, follow these steps:... -
Page 23: Chapter 4 Configuring The Clock Card
• Minimum Software Requirements You must have Cisco IOS Release 12.1(1a)T1 or later, and Cisco IOS Release 12.1(2)EC1 or later if you are configuring the clock card with a Cisco uBR-MC16S or Cisco uBR-MC16E cable interface line card. If you are using a Cisco uBR-MC28C cable interface line card with the clock card, you must use Cisco IOS Release 12.1(3a)EC1 or later. -
Page 24: Configuration And Diagnostic Cisco Ios Commands For The Clock Card
Clock Card Table 4-1 presents a list of basic configuration and diagnostic Cisco IOS commands that you can use to initially configure and troubleshoot clock card installation. For complete command-line syntax examples and more definitive explanations of command-line functions, refer to the Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide. -
Page 25: Appendix
A P P E N D I X Clock Source Paths The schematics in this appendix display the various clock source paths established by the Cisco Cable Clock Card in a Cisco uBR7246 VXR depending on your external connection(s) and configuration. - Page 26 PRI LOS To line cards SEC clk SEC LOS Cable clock No cable clock force secondary source-midplane Clock card primary source to midplane 8 kHz Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01...
- Page 27 PRI clk 20.48 PRI LOS To line cards SEC clk SEC LOS Cable clock Cable clock force secondary source-midplane Clock card primary source to midplane 8kHz Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01...
- Page 28 Appendix A Clock Source Paths Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router OL-26705-01...