Specifications

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Book Title
78-13113-06 B0
Chapter 3 Installing and Removing the Uplink Cards
SONET Distance Information for RPR/SRP, DPT, and POS/DPT Uplink Cards
SONET Distance Information for RPR/SRP, DPT, and POS/DPT
Uplink Cards
The maximum distance for single-mode installations is determined by the amount of light loss in the
fiber path. Good quality single-mode, short-reach fiber with very few splices can carry an uplink card
signal two kilometers.
If your environment requires the signal to travel close to the typical maximum distance (see Chapter 1,
“Overview and Specifications”), use an optical time domain reflectometer (OTDR) to measure the power
loss.
Figure 3-13 Simplex Optical Cable
Figure 3-14 Duplex Optical Cable
For SONET/SDH single-mode fiber-optic connections, use one duplex LC small form-factor
pluggable(SFP) optical cable (see Figure 3-14) or two simplex optical cables (See Figure 3-13.)
Caution Splicing can degrade cable performance.
Note Single-mode fiber-optic cables are available from various vendors. These cables are not available
from Cisco Systems.
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