Recently, EB-LINK completed and delivered the optical fiber transformation of the visual network in the patch shop of an electronics factory. More than a dozen inverters in the workshop are concentrated in the same section of wire trough. The camera link, which was originally run with shielded network cables, frequently retransmitted errors and caused intermittent images in the production line judgment.
Phenomenon before transformation
Errors are concentrated at the moment when the placement machine starts and stops. Packet capture can reveal retransmissions, but the link itself is not interrupted and the port does not go down. After taking the network cable out of the cable trough and walking it for a while, the problem was obviously improved. This indicates that the common mode interference is coupled into the copper cable, rather than a fault of the camera or back-end equipment. This kind of phenomenon is most easily misjudged as an equipment quality problem, resulting in a round of equipment replacement that still does not solve the problem.
Transformation practices
- The backbone between cabinets was changed from shielded network cables to dual-fiber optical fibers to avoid the common-mode interference of the frequency converter from the physical layer.
- Keep a short section of shielded network cable on the side of the workstation to connect to the camera, and the length should be controlled within ten meters.
- The entrance to the cabinet is uniformly grounded, the optical fiber and power cords are run in separate slots, and the intersections are spanned vertically.
- Armored jumpers are used under the cabinet to prevent pulling and rat bites.Single-mode single-core armored jumpers, anti-mouse jumper pigtails, special jumpers for Internet cafes, special jumpers for cabinetsIt is prepared for this kind of scenario.
Post-delivery comparison
SupportingSFP+ 10G single-mode dual-fiber 10km optical moduleRecord the transmitting and receiving luminous power one by one, and continuously observe one shift before and after delivery. The error retransmission count of the modified section returns to zero, and sporadic retransmissions can still be seen in the remaining unmodified sections. The comparison relationship is clear at a glance, the production line judgment image is no longer intermittent, and the rework time is reduced. The workshop then included the remaining two lines in the renovation plan. For similar inquiries, please call 0755-83179002.