Cisco UBR7246VXR Installation Manual - Page 27
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Also for Cisco UBR7246VXR: Quick Start Manual (27 pages), User Manual (7 pages), Hardware Installation (25 pages)
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Appendix A
Clock Source Paths
Figure A-4
Secondary Internal Clock Source
Port adapters w/
External SRCs
internal clocking
PRI SEC
PA
PA
Clock recovery
Clock card
Midplane
and filter chips
clk mux
clk mux
PA
PRI
SRC
PRI clk
20.48
PRI LOS
MHz
To line
PA
cards
SEC clk
SEC
SEC LOS
SRC
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
A-3
OL-26705-01