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The daisy chaining installation can continue from each
HMFOC adapter port, but with a reduced chain in either
direction as defined by the fiber branch quantity.
Although this terminal has no reverse feed adapter port,
the reverse feed functionality is still available in the
reduced chains.
5.2.6.
Multi-use
5.2.6.1.
Internal splitter with pass-thru fibers
Multi-use fiber terminals are designed to deliver splitter
based services and/or traditional “unsplit” services. The
splitter (if present) is always connected to the first fiber of
the incoming 12 fiber stand. The outputs of the splitter are
indicated with a black dust cap. Adapters with an orange
dust cap indicate a straight pass-thru fiber. It is a fiber
dropped of from the incoming 12 fiber chain, but unsplit
(it is a regular fiber coming from the hub).
Example below shows the first fiber dropped of routed
to an integrated 1:4 splitter and the second and the third
fiber dropped of directly routed to the adapter port.
The other 9 fibers from the incoming 12 fiber strand
continue via the green HMFOC adapter port where fiber
4 of the incoming strand will take in position 1 in the
adapter port. 3 fibers from the red reverse port will take in
positions 10,11 and 12 in the green HMFOC port. In this
case the reverse port is also an HMFOC adapter port.
In this example, link installation decreases to 4 terminals
in a chain.
DROP
DROP DROP DROP
Fiber 1
1
2
2
3
1
4
3
5
4
6
6
5
7
7
8
8
9
9
10
10
11
11
12
12
DROP
DROP
HMFOC
HMFOC
5.2.5.
Indexing branch terminal
The indexing branch terminal enables dividing the
incoming 12 fibers into 2 HMFOC adapter ports. This
configuration provides more flexibility in the distribution
network as greater spatial coverage area can be
achieved. Neither the reverse feed port nor the single
drop ports are included on an indexing branch terminal.
The image below shows the schematic inside the
terminal:
The first fibers from the incoming 12 fiber tail are always
routed to the blue HMFOC connector, indicated with
letter B, the other fibers are routed to the green HMFOC,
indicated with letter A.
The fibers always take in the first fiber positions in the
multi fiber connector. Image above illustrates the first 3
fibers from the incoming 12 fiber tail (input) routed to the
first 3 positions in the blue HMFOC connector, the last
9 fibers from the incoming 12 fiber tail routed to the first
positions in the green HMFOC connector. The remaining
positions of the green and blue HMFOC are unused.
The Indexing branch terminal can be delivered with
following division of the incoming 12 fibers.
B (blue)
A (green)
1,2
3 to 12
1 to 3
4 to 12
1 to 4
5 to 12
1 to 5
6 to 12
1 to 6
7 to 12
The model number (catalogue number) indicates the
quantity of fibers going to the blue HMFOC:
For example
NDX-B3
indicates that the first 3 fibers
of the incoming 12 fiber strand are routed to the blue
HMFOC and the last 9 fibers are routed to the green
HMFOC taking in the first positions (position 1-9) in the
connector.
The image below shows the color code and the letter
code of the 2 HMFOC adapter ports.
HMFOC
1
2
3
4
5
6
7
1
2
3
1
3
2
4
8
5
9
6
10
7
11
12
8
9
B
HMFOC
A
HMFOC Adapter port A
HMFOC Adapter port B
