![background image](http://html.mh-extra.com/html/cisco/gigabit-switch-router-cisco-12012/gigabit-switch-router-cisco-12012_installation-and-configuration-manual_65984089.webp)
Preparing for Installation 2-19
Site Requirement Guidelines
Table 2-7
Estimating Link Loss
After calculating the power budget minus the data link loss, the result should be greater than
zero. Results less than zero may have insufficient power to operate the receiver.
For SONET versions of a line card, the signal must meet the worst case parameters listed
in Table 2-8.
Table 2-8
Line Card SONET Signal Requirements
Link Loss Factor
Estimate of Link Loss Value
Higher order mode losses
0.5 dB
Clock recovery module
1 dB
Modal and chromatic dispersion
Dependent on fiber and wavelength used
Connector
0.5 dB
Splice
0.5 dB
Fiber attenuation
1 dB/km
Single-Mode
Multimode
PT
–18.5
–15
PR
–30
–28
PB
11.5
13
Summary of Contents for Gigabit Switch Router Cisco 12012
Page 4: ......
Page 12: ...xii Cisco 12012 Gigabit Switch Router Installation and Configuration Guide ...
Page 16: ...xvi Cisco 12012 Gigabit Switch Router Installation and Configuration Guide ...
Page 96: ...2 26 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide Site Log ...
Page 310: ...14 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide ...