1. When shutting down, be sure to turn off the power of the equipment first and then turn off the air supply.
Second, after the end of the salt spray test, the studio should be cleaned as necessary.
Third, if the salt spray test chamber is not to be tested for a long time (more than two weeks), the studio and the water seal groove should be thoroughly cleaned with clean water, and the nozzles shall be cleaned to prevent salt from crystallizing and clogging the nozzle to ensure the normal operation of the next test. . At the same time, the water in the saturator should be drained through the drain valve.
Fourth, the fog pipe should not be blocked, the nozzle should be lower than the fog joints, so as not to affect the row of fog, so that the work chamber pressure increased, causing the lid to set off, affecting the test results.
5. If you do not use the equipment for a long time, you should unplug the power plug. Before restarting the system, perform the necessary inspection on the electrical system.
The task of the managed switch is to keep all network resources in good condition. The network management switch product provides a variety of network management methods based on the terminal control port (Console), based on the Web page, and supports Telnet to remotely log in to the network. Therefore, network administrators can perform local or remote real-time monitoring of the switch's working status and network running status, and manage the working status and working mode of all switch ports in a global view.
The switch is the most important network connection device of the LAN, and the management of the LAN mostly involves the management of the switch.
The network management switch supports the SNMP protocol. The SNMP protocol consists of a set of simple network communication specifications, which can complete all basic network management tasks, has a small demand for network resources, and has some security mechanisms. The working mechanism of the SNMP protocol is very simple, mainly through various types of messages, namely PDU (protocol data unit) to achieve the exchange of network information.
There are also managed switches that provide policy-based QoS (Quality of service). Policy refers to the rules that control the behavior of the switch. The network administrator uses the policy to allocate bandwidth and priority for application flows and control network access. The focus is on the bandwidth management strategy required by the service level agreement and the way of publishing the policy to the switch. Multifunction light emitting diodes (LEDs) used to indicate port status, half duplex/full duplex and 10BaseT/100BaseT at each port of the switch, and switch status LEDs that indicate system, redundant power supply (RPS) and bandwidth utilization A comprehensive and convenient visual management system has been formed.
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