Name: 
 

Fiber U OLAN Self-Study Lesson 3



 1. 

Passive optical LANs use standard FTTH architecture and protocols which are similar to typical LANs.
 

 2. 

Passive optical LANs use optical splitters to divide the optical signal to allow up to ____ devices (ONTs) to be connected to one port on the optical line terminal (OLT) that is the center of the LAN.
A.
1
B.
4
C.
32
D.
Unlimited number
 

 3. 

Downstream the splitter splits the signal from the OLT to serve multiple ONTs while upstream it acts as a combiner to merge all the signals onto the same fiber connecting to the OLT, thus carrying bi-directional signals on one fiber.
 

 4. 

Passive OLANs use two wavelengths for bi-directional signals: _________ nm downstream from the OLT to the ONT and __________nm  upstream from the ONT to the OLT.
A.
850, 1300
B.
1310, 1550
C.
1490, 1310
D.
1310, 850
 

 5. 

The PON splitter serves the same purpose as a ______ but requires no power/ground/AC and takes a fraction of the space.
A.
Patch panel
B.
Attenuator
C.
WDM
D.
Ethernet switch
 

 6. 

ONTs in LANs are usually ________ but other options are available.
A.
4-port Gigabit Ethernet switches
B.
Triple play ONTs (voice/Ethernet/TV)
C.
Multiple port phones
D.
All of these
 

 7. 

As we mentioned above, OLANs are using only singlemode cables which are easy to install but require special termination procedures (generally prepolished/splice connections) or using prefab cable assemblies.
 



 
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