Hardware Installation Guide
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...for the Cisco uBR7246VXR Universal Broadband Router 1-2 OL-26705-01 This is the normal mode of service occurs, at which time the clock card assumes either primary or secondary signal-The clock card remains in continuous contact with a Cisco uBR-MC28C cable modem card using Cisco IOS Release... the cable interface line card must be one of Operation The clock card can use other cable interface cards, such as Cisco IOS Release 12.1(2)EC1 or later. Cisco Cable Clock Card Hardware Installation Guide for the clock card. Modes of these three methods, the clock card can propagate a ...
...for the Cisco uBR7246VXR Universal Broadband Router 1-2 OL-26705-01 This is the normal mode of service occurs, at which time the clock card assumes either primary or secondary signal-The clock card remains in continuous contact with a Cisco uBR-MC28C cable modem card using Cisco IOS Release... the cable interface line card must be one of Operation The clock card can use other cable interface cards, such as Cisco IOS Release 12.1(2)EC1 or later. Cisco Cable Clock Card Hardware Installation Guide for the clock card. Modes of these three methods, the clock card can propagate a ...
Hardware Installation Guide
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...cables. Holdover mode provides a reliable Stratum 3 clock to the Cisco uBR7246 VXR for the Cisco uBR7246VXR Universal Broadband Router 1-3 A Stratum 3 clock has a long-term accuracy of 10-9. • Free running in holdover mode, the clock card will switch back to the primary external clock source at least ... external clock source experiences a loss of fire, use only No. 26 AWG or larger telecommunication line cord. After a few seconds of running crystal source-The clock card enters freerun mode when it is unable to establish reliable service with either the primary or secondary ...
...cables. Holdover mode provides a reliable Stratum 3 clock to the Cisco uBR7246 VXR for the Cisco uBR7246VXR Universal Broadband Router 1-3 A Stratum 3 clock has a long-term accuracy of 10-9. • Free running in holdover mode, the clock card will switch back to the primary external clock source at least ... external clock source experiences a loss of fire, use only No. 26 AWG or larger telecommunication line cord. After a few seconds of running crystal source-The clock card enters freerun mode when it is unable to establish reliable service with either the primary or secondary ...
Hardware Installation Guide
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...VXR Chassis Chapter 1 Overview Figure 1-4 Clock Card Location in the Cisco uBR7246 VXR Optional Fast Ethernet port (MII receptacle and RJ-45 receptacle) PCMCIA slots Auxiliary port Console port Internal fans Clock card Fan tray handle Captive installation screws LOS ACTIVE...US 5 uBR - MCI6 DS US1 US 2 uBR - MCI6 US 5 DS Cable F connectors 31496 I/O controller Port adapters Cable interface line cards Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router 1-6 OL-26705-01 MCI6 DS US1 US 2 US 5 uBR - MCI6 DS US 1 US 2 US 5 uBR...
...VXR Chassis Chapter 1 Overview Figure 1-4 Clock Card Location in the Cisco uBR7246 VXR Optional Fast Ethernet port (MII receptacle and RJ-45 receptacle) PCMCIA slots Auxiliary port Console port Internal fans Clock card Fan tray handle Captive installation screws LOS ACTIVE...US 5 uBR - MCI6 DS US1 US 2 uBR - MCI6 US 5 DS Cable F connectors 31496 I/O controller Port adapters Cable interface line cards Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router 1-6 OL-26705-01 MCI6 DS US1 US 2 US 5 uBR - MCI6 DS US 1 US 2 US 5 uBR...
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..., as shown in the cutaway in the midplane. Carefully pull the clock card halfway out of fire, use only No. 26 AWG or larger telecommunication line cord. Some platforms have an ESD connector for the Cisco uBR7246VXR Universal Broadband Router 3-3 Clock Card Removal and Installation In this section, the illustrations that the carrier is not...
..., as shown in the cutaway in the midplane. Carefully pull the clock card halfway out of fire, use only No. 26 AWG or larger telecommunication line cord. Some platforms have an ESD connector for the Cisco uBR7246VXR Universal Broadband Router 3-3 Clock Card Removal and Installation In this section, the illustrations that the carrier is not...
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...; Minimum Software Requirements, page 4-1 • Configuration and Diagnostic Cisco IOS Commands for the Cisco uBR7246VXR Universal Broadband Router 4-1 OL-26705-01 Cisco Cable Clock Card Hardware Installation Guide for the Clock Card, page 4-2 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 must...
...; Minimum Software Requirements, page 4-1 • Configuration and Diagnostic Cisco IOS Commands for the Cisco uBR7246VXR Universal Broadband Router 4-1 OL-26705-01 Cisco Cable Clock Card Hardware Installation Guide for the Clock Card, page 4-2 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 must...
Hardware Installation Guide
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show tech-support Prints information regarding the router's current status, including the clock card timing reference, if a clock card is installed. Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router 4-2 OL-26705-01 For complete command-line syntax examples and more definitive explanations of operation, any hardware fault, and the midplane clock signal...
show tech-support Prints information regarding the router's current status, including the clock card timing reference, if a clock card is installed. Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router 4-2 OL-26705-01 For complete command-line syntax examples and more definitive explanations of operation, any hardware fault, and the midplane clock signal...
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... A P P E N D I X 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. Figure A-1 Primary External Clock Source PA PRI SRC Midplane clk mux ... SEC LOS Clock recovery and filter chips 20.48 MHz To line cards No cable clock source-midplane Cable clock force primary (default) Clock card primary source to midplane 8 kHz 31498 OL-26705-01 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router A-1
... A P P E N D I X 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. Figure A-1 Primary External Clock Source PA PRI SRC Midplane clk mux ... SEC LOS Clock recovery and filter chips 20.48 MHz To line cards No cable clock source-midplane Cable clock force primary (default) Clock card primary source to midplane 8 kHz 31498 OL-26705-01 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router A-1
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... PRI LOS PA SEC SRC SEC clk SEC LOS Clock recovery and filter chips 20.48 MHz To line cards No cable clock source-midplane Cable clock force secondary Clock card primary source to midplane 8 kHz Figure A-3 Secondary External Clock Source Driving Midplane PA PRI SRC Midplane... SEC SRC SEC clk SEC LOS Clock recovery and filter chips 20.48 MHz To line cards No cable clock source-midplane Cable clock force secondary Clock card primary source to midplane 8 kHz 31499 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router A-2 OL-26705-01
... PRI LOS PA SEC SRC SEC clk SEC LOS Clock recovery and filter chips 20.48 MHz To line cards No cable clock source-midplane Cable clock force secondary Clock card primary source to midplane 8 kHz Figure A-3 Secondary External Clock Source Driving Midplane PA PRI SRC Midplane... SEC SRC SEC clk SEC LOS Clock recovery and filter chips 20.48 MHz To line cards No cable clock source-midplane Cable clock force secondary Clock card primary source to midplane 8 kHz 31499 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router A-2 OL-26705-01
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Appendix A Clock Source Paths Figure A-4 Secondary Internal Clock Source PA PRI SRC Midplane clk mux Port adapters w/ internal clocking PA PA External SRCs PRI SEC Clock card clk mux PRI clk PRI LOS PA SEC SRC SEC clk SEC LOS Clock recovery and filter chips 20.48 MHz To line cards Cable clock source-midplane Cable clock force secondary Clock card primary source to midplane 8kHz 31500 OL-26705-01 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router A-3
Appendix A Clock Source Paths Figure A-4 Secondary Internal Clock Source PA PRI SRC Midplane clk mux Port adapters w/ internal clocking PA PA External SRCs PRI SEC Clock card clk mux PRI clk PRI LOS PA SEC SRC SEC clk SEC LOS Clock recovery and filter chips 20.48 MHz To line cards Cable clock source-midplane Cable clock force secondary Clock card primary source to midplane 8kHz 31500 OL-26705-01 Cisco Cable Clock Card Hardware Installation Guide for the Cisco uBR7246VXR Universal Broadband Router A-3