Triple-Play Service Deployment

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Voice
IP Data
Video
Figure 3.3 A standard FTTP system
Chapter 3: Deploying and Troubleshooting Fiber Networks
Central Office or Remote Terminal Fiber Distribution
Passive Outside Plant
Packet
Optical
Line
Termination
Video
Optical
Line
Termination
WDM
IP Data and Voice
Upstream and Downstream
Video Wavelength
Splitter
Optical
Network
Termination
Passive outside plant – signal is passively split
Coarse WDM supports three wavelengths – 1490/1310/1550 nm
Two wavelengths for IP data and voice – separate 1490 nm downstream and 1310 nm upstream wavelengths
Optional 1550 nm third wavelength – one way broadcast for analog and digital RF video
In a PON network (see Figure 3.4), the signals are combined into a
single fiber using WDM techniques at the CO with an OLT. At the
CO, a fiber distribution frame (FDF) integrates a number of OLTs
together with splicing trays and connectors, which, in turn,
connect the OLTs to the fiber network. COs may contain optical
networks. The type of connectors at the OLTs is most often ultra
polished connectors with a typical ORL value from 50-55 dB. More
modern networks utilize angle polished connectors (APC) with an
ORL value of 67-70 dB.