16 August 06 FDM-FSK Preliminary User Guide
20
Dwg: A01230
Fiber Identification Techniques
This method assumes the technician is dealing with the worst case i.e. no fibers are
assigned or labeled at each modem location, just patchcords.
Let’s assume that we are installing a Daisy Chain down an arterial roadway, at each
end of the system you will have only two fibers, at all locations in between there will
be four fibers, two from downstream and two from upstream, all modems are
powered off.
1.
Starting at the Master location (City Hall) power up the
modem and connect the two fibers into T1 and R2.
2.
At the next location power up the modem and connect
each patchcord, one at time, into
R2
.
When the modems display indicates “
1
”, insert this fiber
into
R1
.
3.
The remaining three patchcords are then rotated through
T2
until you see the:
a.
Daisy Chain display,
b.
Or if you have the Slave set to 2 Rings you will
see a Fold-Back display.
You will now have Fiber communications with City Hall
Note: City Hall will also have the Daisy Chain Display, if it was set to 2
Rings then it will have a Fold-Back display.
4.
Continue steps 2 and 3 until you reach the end of the Daisy Chain.
T1
R2
R1
T2
LOS
LOS
Slave 1
T1
R2
R1
T2
LOS
LOS
Slave 1
T1
R2
R1
T2
LOS
LOS
Slave 1
T1
R2
R1
T2
LOS
LOS
Master
T1
R2
R1
T2
LOS
LOS
Master
T1
R2
R1
T2
LOS
LOS
