Triple-Play Service Deployment

68
1490nm laser/
1310nm meter OLT
1550nm laser
( optional)
video
Optical
connectors
Central Office Tests
– OLT output power
– Video output power
– ONT + link input power
– ORL
– Patch cord loss
– WDM coupler loss
WDM
Coupler
Point-to-Point
Network
Distribution Fiber Tests
– Attenuation
– Splice loss
– Connector loss
– Connector reflectance
– ORL
– Fault location
– Continuity check
Figure 3.16 Tests to perform on a point-to-point network
Chapter 3: Deploying and Troubleshooting Fiber Networks
WDM
Coupler
ONT
Premises Tests
– ONT output power
– Video/data + link input power
– WDM coupler loss
The fiber patch panels are located only at the fiber ends—a fiber
distribution frame at the central office and the remote fiber
distribution frame at the remote central office, or alternatively the
terminal close to the customer premises.
During the fiber construction and for the complete acceptance
tests, there are only point-to-point fiber links. Therefore, the
process is straightforward, and either dual wavelength OTDRs
operating at 1310/1550 nm or a source/power meter/ORL meter
combination is used.
The transmission equipment is not as complex and includes
Ethernet DSLAMs, or ONUs. Frequently, only one or two wavelengths
(1310/1490 or 1490/1550 nm) are used thereby requiring
the use of only standard power meters.
Because there is no frame along the complete distribution fiber,
troubleshooting tests are performed from the CO first, then at any
accessible test point on the network to the customer premises.
OTDRs or a source/power meter/ORL meter combination is used.