Fiber Closure-Dome type -GJSM5

Share to:


A type of dome closure series, used for direct connection during optical fiber transmission, and provides joint connection protection, with 4 small round holes and 1 large hole; heat sealing with heat shrinkable casing; can be used for overhead, pole, wall and buried installations. With good sealing performance, the simple installation and wide application range are the best choice for optical fiber connection.



  • All functional indicators are in line with thenational YD814.1-2004 standard for distribution
  • Four-in and four-out cable ports; there are 4 roundholes

and one oval hole, which suits for Φ7~Φ20cables.

  • The outer box body is made of high-strength engineering plastics, It has features of light weight, high mechanical strength, anti aging, strong corrosion resistance,lightning resistance, and long service
  • Stacked structure splice tray makes it flexible, convenient and safe for the optical fiber core configuration,expansion and the cable
  • Special slot in the splice tray for fixing 1:4 and 1:8 or 1:16 PLC splitter.



Size F190*316
Cable ports (inlet/outlet) 3  in/ 3 out
Cable diameter (mm) F7~F20
Splice tray capacity 24 (single core)
Max splice tray number 4
Max core capacity 96 (single core)
Max splitting 1:4 (4pcs), 1:8(2pcs), 1:16(1pc)
Sealing type Heat shrinkable sleeve, silicon rubber


Technical Index

  • Fiber radius of curvature:≥40mm
  • Optical disk additional loss: ≤01dB
  • TemperatureRange: – 20°C ~ + 60°C
  • Anti lateral pressure: ≥2000N / 10cm
  • Shock resistance:≥20N.m
  • Protection level:IP65



1. Cable installation

① Open the hole:Saw the entry ports as need.

② Clean the cable sheath with cloth(about 1.4 meter)

③ Slide the cable into the hole.

2. Cable preparation

① Strip the cable sheath, clean the filing, cut the cable reinforced core at 75mm distance from the sheath cut;

② If a shielded cable is installed, leave a cable shielding layer of approximately 25mm x 25mm in the axial direction at the annular cutout of the cable and clamp the shielded cable;

③ Cut off the loose tube at 35mm from the annular section of the optical cable, remove the oil on the optical fiber bundle, put on the bare fiber protection tube.

④ Align the cable section and the base hole end, insert the reinforced core into the fixing hole, squeeze it with a nut and cut off the excess;

⑤ If shield wire is used to connect 2 cables, the cables should be paired together according to the outlet order.

3. Oval hole sealing

① Wipe the elliptical surface and cable sheath with a clean piece of paper or cloth to a distance of 100mm from the edge of the hole;

② Rough the elliptical surface and cable sheath with sand paper, clean them with cloth;

③ Put on the elliptical heat shrinkable tube, and mark the optic cable on the end of the tube;

④ make the 2nd mark on the cable at 5mm from the 1st marker;

⑤ Wrap the cable with warm aluminum paper from the 2nd mark;

⑥ When install the 2nd cable, allocate the heat shrinkable tube according to the cable size, insert the branch card (note: all the branch cards should be fully inserted into the heat shrink tube)

⑦ Heat the heat shrink tube with a torch so that it shrinks all over the holder and cable, then heat the clips on both sides until the hot melt flows out of the two cables.

4. Optic Cable installation

① Each splice tray holds a maximum of 24fiber joints, and holds up to 2 bare fiber protection tubes on each side of the tray, marking each tube at a 15mm distance from the edge of the splice tray;

② Carefully cut off the extra protection tube at the mark and secure the tube to the tray with a strap.

5. Optical fiber connection and storage

① Connect the corresponding fibers according the requirement;

② Place the fiber joint in the card slot of the splice tray, coiled the remaining fiber in the tray;

③ Check if all fibers are intact, then cover the transparent lid and fix it to the splice tray.

6. The box installation

Place the box cover on the box base, tighten them together through locking ring, install it by wall mounting or pole mounting.

Featured Products

Scroll to Top