◆ Strength member code
Strength member used for strength tensile sheath or inset sheath
(non)--------Metallic strength member
F------------------ F—Non-metallic strength member
◆Cable core and optical cable derive structure character code
Optical cable structure character shall reflect main type and derive structure of cable core. it is shared code when there are several structure character need mark. It is compound code arrange from up to down according to code below.
|
D……………… optical fiber ribbon structure
(Non) ……………loose tube stranding structure
J …………tight buffered fiber structure
(Non) ……………………… Tier twist structure
X……………… central tube structure
T……………………… filled compound
|
(Non)…… dry type water-resistance structure
R…………………………… charge structure
C…………………… self-supporting structure
B………………………… compressed structure
E……………………………… ellipse structure
Z……………………… flame-retardant structure
|
◆ Symbols for sheath
|
Y……………………… polyethylene sheath
|
V…………………… PVC sheath
|
|
U……………………… polyurethane jacket
|
A………… aluminum-polyethylene clung structure
|
|
S………… steel-polyethylene clung structure
|
W……… steel polyethylene clung sheath with steel wires inside
|
|
L…………………………… aluminum sheath
|
G…………………………… steel sheath
|
|
Q…………………………… lead sheath
|
|
TABLE 1 Armour layer
|
Code
|
Armour layer
|
|
0
|
Non-armour layer
|
|
2
|
wrapping double steel tape
|
|
3
|
single thin steel wire
|
|
33
|
Double thin steel wire
|
|
4
|
single thick steel wire
|
|
44
|
double thick steel wire
|
|
5
|
Corrugarted steel tape
|
◆ Symbols for Outer sheath
It can include mat layer, armour layer and muter coating when there is outer coating, It is code show for two group number(mat layer need not)first group is armour layer, it is can one or two number, see table 1,second group is outer coating or sheath It is one number see table 2.
Table 2 Outer coating or sheath
|
code
|
Outer coating or sheath
|
|
1
|
Fiber coating
|
|
2
|
PVC sheath
|
|
3
|
PE sheath
|
|
4
|
PE+nylon sheath
|
|
5
|
PE protect sheath
|
◆ Symbols for cable specification
Coble specification is made up of fire and conduct core.
◆ Symbols for fiber count
Represented by the figure of valid fiber number of the same category.
◆ Symbols for fiber classification
Fiber classification is represented by symbols for fiber type. Uppercase “A” represented Multi mode optical fiber, uppercase “B” represented single mode optical fiber, numeral and lowercase represented various classifications for single or multi mode fiber, common symbols as follows.
Table 3
|
type code
|
character
|
Fiber core dia.
（μm）
|
cladding diameter
（μm）
|
Matcrial
|
|
Ala
|
Grade-index multimode fiber
|
50
|
125um
|
SiO2
|
|
Alb
|
Grade-index multimode fiber
|
62.5
|
125um
|
SiO2
|
|
Alc
|
Grade-index multimode fiber
|
85
|
125um
|
SiO2
|
Description
