Knowledge

When expanding the capacity of centralized image storage, bottlenecks are often scattered in three places: server network card, interconnection in the cabinet, and internal disks. This article provides three paragraphs for model selection and budget saving, explaining when to use DAC, when to replace the optical port network card, and what to do if there are not enough cache disks.

The radiology department's access and upload are slow. In many cases, it is not because there is insufficient storage, but because a certain section of the link is slowing down or losing packets. This article provides a reusable troubleshooting sequence: check the negotiation rate, measure the transmission and reception in each direction, organize the jumpers and distribution frames, and finally judge the capacity expansion to help the hospital information department avoid detours.

The weak current room of a multi-tenant building is often crowded with access equipment for more than 20 households. Mixed lines, wrong labeling, and no accounting will double the time of a change. This article provides a management plan for shared weak current rooms based on three things: color coding, partitioning, and accounting.

Whether to use copper cables or optical cables for the last 100 meters from the weak current room to the tenant's home depends on the distance, interference and change frequency. This article gives the actual boundaries of copper cable extension, three situations of light modification, and the points to note when the armored end is terminated.

When deploying wireless APs in buildings, the backhaul links are often limited by 100 meters of copper cables, and the measured load of Wi-Fi 6/7 high-power APs is close to Gigabit. This article explains the ranging, fixed speed, jumper selection, and power supply coordination of fiber optic backhaul.

After a tenant quits, the workstation layout and bandwidth requirements of the new tenant are often different. This article gives a four-step method to limit the change work to weak current rooms and indoors: check the ledger, reconfigure the access equipment, change jumpers and labels, and retest and archive.

The access rate and optical path on the tenant side are constantly changing. The transceiver with an SFP slot separates the complete machine and the module. The rate and wavelength can be reserved for later use. This article discusses the differences, applicable scenarios, and two points of attention when matching modules.

Before the terminal delivery of optical fibers to tenants in weak current rooms of a building, the terminal plan, labeling system and excess length processing determine the convenience of future changes and troubleshooting. This article lists the items to be checked one by one.

The actual benefit that the POL all-optical network brings to campus operation and maintenance is that there are fewer maintenance objects: active equipment on the floor is reset to zero, and troubleshooting becomes two things: optical power and cleaning. This article records fault location ideas based on ports, fiber segments, and baselines.

Why is it suitable for POL to install optical fiber to the bedside in the ward? It is also more difficult to construct than a teaching building: nurse calls, infusion alarms, and mobile ward rounds are all tied to the network, and the network cannot be disconnected for a long time during the renovation. This article arranges three things: bandwidth isolation, hospital construction and wiring of old equipment.