December,12.23
Type
① Symbol of the classification
GY——outdoor（field）communication optical cable
GJ——indoor communication optical cable
② Symbol of strength member
No symbol——metallic strength member
F——non-metallic strength member
③ Symbol of structure characteristics
No symbol——loose tube structure
J—— tight structure
X——central tube structure
T——jelly-filled structure
Z——Flame retardant type
④ Symbol of sheath
Y——PE sheath
V——PVC sheath
U——polyurethane
A——Al-polyethylene laminated sheath
S——steel-polyethylene laminated sheath
W——with embedding steel-polyethylene laminated sheath
⑤ Symbol of protective covering
According to the provision of GB/ T 2952.1, denoted with the figure, such as:
53—－Corrugated steel-tape armored polyethylene outer sheath
33――Steel wire armored polyethylene outer sheath
93――Steel wire braid armored polyethylene outer sheath
Specification
① Symbol of the fiber quantity
It is denoted by virtual number of congeneric fiber in optical cable.
② Symbol of fiber sort
It is denoted by classified symbol of fiber，namely, capital letter A and B denote multimode fiber and single-mode fiber separately. number or small letter denote different kinds ofmultimode fiber and single-mode fiber. Common symbols are as follows：
A1a—50/125μm silicon dioxide series gradient multimode fiber
A1b—62.5/125μm silicon dioxide series gradient multimode fiber
B1.1—dispersion-unshifted single-mode fiber (ITU-T G.652A,B fiber), (B1 is shorthand for B1.1)
B1.3—extended wavelength band dispersion-unshifted single-mode fiber (ITU-T G.652C,D fiber)
B4—silicon dioxide series non?zero?dispersion shifted single-mode fiber(G.655 in ITU-T fiber)
