
B–63783EN/01
D. OPTICAL FIBER CABLE
459
Ferrule
Protective cover
Optical cable
Optical connector
D Features of low–loss optical cable (A66L–6001–0029)
A low–loss optical cable is selected from conventional PCF optical
cables (A66L–6601–0026). The selected cable offers low loss, and
its connector section is given special treatment; the fiber ends are
provided with a depression so that the ferrules can be butted against
each other. The two optical cables used with the low-loss optical
junction adapter must be of low–loss type.
D Appearance of the low–loss optical junction adapter and cable
(how to distinguish them from conventional types)
The body of the conventional optical junction adapter is black, but
that of the low–loss optical junction adapter is blue. In addition,
the protective cover(Note 1) of the conventional PCF optical cable
is black, but that of the low–loss optical cable is blue.
8. Installing the optical fiber junction adapter
The optical fiber junction adapter should be installed within a cabinet,
as a rule. If it is impossible to avoid installing it within a cabinet,
protect the adapter and the optical cable portions (such as connectors
and cords) not covered with reinforcement coating from the outside air
by, for example, covering them with packing.
9. Environmental resistance of the optical fiber junction adapter
D The optical fiber junction adapter is not waterproof. Even when
optical cables are attached to both ends of the adapter, there are very
small gaps in the linked portions, so water resistance can not be
expected.
D When optical cables are attached to both ends of the junction
adapter installed in a normal environment (such as within a
cabinet), it is unlikely that dust will penetrate between the adapter
and optical fiber to the degree that it may hamper normal optical
linkage. If one or both ends of the adapter are left open, dust and
dirt may accumulate even when the adapter is in a normal
environment (such as within a cabinet). The dust and dirt on the
adapter ends is likely to hamper normal optical linkage when the
optical cables are attached. In such a case, clean the junction
adapter and the optical connector using the optical fiber junction
adapter cleaning method described below.