FTTP 16 Flashcards
EPON
Ethernet Passive Optical Network
FTTP
Fiber to the Premises
GFI
Ground Fault Interrupt
NAP
Network Access Point
Soft material fitted over the end of the fiber drop to facilitate pulling
Pull Sock
RFOG
RF over glass
WDM
Wave division Multiplexing
PON
Passive Optical Network
LASER
Light Amplification Stimulated by Emissions of Radiation
What Class LASER is used in FTTP
Class 1
Coiling fiber in this pattern prevents winding up as this pattern reverses direction every 180 degrees
Figure 8
The loss of optical or electrical energy due to an electrical or mechanical obstruction.
Attenuation
RFoG Downstream
1550nm
RFoG Upstream
1610nm
EPON Downstream
1490nm
EPON Upstream
1310nm
required bond conductor gauge wire
12 gauge
AWG
American Wire gauge
The maximum total coax distance between the R-ONU and Power Supply
50ft
Always keep your eyes at a ___ degree angle or perpendicular to any optical connection
90
A smaller vault located between the pedestal and the home.
Hand Hole
Refers to cable that can be burried directly underground without the aid of conduit.
Direct Bury
Always pull fiber from the ___ to the ____
Vault to the enclosure
placed between the headend and the served neighborhood. A handful of primary fiber are routed from the headend to the
splitter cabinet
Locating the ONU or associated power supplies in an ____ is prohibited.
attic space
Greenfield or Brownfield
Greenfield - Represents new neighborhoods with new homes. Brownfield - Is older established neighborhoods
Pre cut drops come individually packaged according to length and connector type ranging from
50 to 400 feet
There’s typically less than ____ of loss through a fiber drop 5000 feet long
1dB
R-ONU
RFoG Optical Network Unit
Over 80% of FTTP installation failures are related
to dirty connector interfaces
NAPs are available from several vendors, they come in
2, 4, 6, 8, and 12 port varieties.
R-ONU output signal power
19 dBmV
At minimum a _______ must also be installed inside the premises for MDU
four way splitter
The R-ONU requires a _____ power source delivered over coax
12 volt DC
Never put a _____ on the center port, internally it will short the 12 volt power
terminator
As of February 16, 2016 all RFoG installations that include back up R-ONU power must also include a
back-up battery for the eMTA.
Back up for R-ONU has a double chirp 15 minutes apart means
replace battery
When activating a fiber drop, make the connection at the______first followed by the connection at the NAP
R-ONU
Most optical power loss occurs at the ____, one at the NAP and the other at the R-ONU.
connector
The NAP or Network Access Point is simply a
a fiber break out box.
A four port NAP has four fibers
blue, orange, green, brown
The NAP has how much attenuation value?
none
a splitter cabinet typically has how many spits?
32
If the light power reading is above ___, the level is acceptable and the fiber can be reconnected to the ONU.
-5 dbm
Aurora ONU…Green = optical input power is equal to or greater than
-10 dBm
Aurora ONU…Red = optical input power is less than
-10 dBm
Aurora ONU…RF output CNR
> 48 dB
Commscope MicroNode (EPON) requires Downstream power nominal
-3 to -26 dBm
