Why should the optical fiber head be divided into flat and beveled ports?

Flat and beveled are the grinding methods of the optical fiber end face, PC is the flat port, and APC is the beveled (8 degree angle).

Different grinding methods determine the quality of optical fiber transmission, which is reflected in the insertion back loss.

PC (Physical Contact).PC is microspherical grinding and polishing, and the ferrule surface is ground into a slight spherical surface.

apc (angled physical contact)BevelPhysical contact,Fiber endfaces are typically ground to an 8° bevel.

Typical insertion loss for PC, UPC, and APC connectors.

should be less than the larger value), the typical value is generally smaller than the connector is usually easier to achieve low insertion loss.

The end face of the APC connector is beveled and polished, so the return loss of the APC connector is maintained.

Generally superior to UPC connectors. In general, the return loss of the PC is -50dB (or even higher). The APC industry standard return loss is -60dB.

In order to achieve a higher return loss, APC end faces can be selected.

Shanghai State Road Communication Technology ****, hope, thank you!

Almost. It depends on the usage habits of each person. As for the amount of ink stored and the amount of ink produced, it is just an advertising gimmick. One of the good things about the oblique mouth is that you can clearly see the needle luck.

It is a product designed according to different application environments, and it is done according to actual needs.

The regulations are also based on actual needs.

Normalize all jumper ports as the same port.

3com's network card bar is generally used for servers, which is relatively stable.

Find someone who specializes in computers, and he'll tell you.

Unlimited amount? What's your budget?

Hardware firewall: 2 enterprise-level Layer 3 switches, do load balancing, and then the remaining Layer 2 switches will do.

The following are not hardware-connected devices in a computer network: (d, hard disk).

When the hard disk starts to work, it is generally in high-speed rotation, if we suddenly turn off the power halfway, it may cause the head to rub violently with the platter and damage the hard disk, so avoid sudden shutdown. When shutting down, be sure to pay attention to whether the hard disk indicator on the panel is still flashing, and only when the indicator stops flashing and the hard disk reads and writes is over, you can turn off the computer's power switch.

In the process of using hard disks, there are often many users who will compress in "disk space management". Compress the hard disk with this program. This causes the compressed volume file to grow in size.

As a result, the team slows down, and the number of reads and writes increases, which affects the heat generation and stability of the hard drive. Therefore, it will lead to a reduction in service life. So, if the hard drive is sufficient, there is no need to use this program.

d hardware connection device, this statement is more special!

d.Hard Disk A hard disk storage device.

Select D: Hard disk.

Several others are required for an internet connection.

If you can't change it yourself, it's a hardware change that must be solved through your network provider.

Apply with the carrier Your equipment will be changed to a fiber optic transceiver, and the tariff will definitely change.

You can only apply for it, and you can't change it yourself.

To buy a light cat, you have to apply to the relevant departments.

Optical fiber network equipment belongs to Group 0907, Class 9 of the Trademark Classification;

According to statistics, 55 trademarks of optical fiber network equipment have been registered.

How to choose other sub-categories when registering:

1.There was 1 trademark in the category of serial bus converter (computer network connection equipment, group number: 0907) that was selected for registration, accounting for a large proportion of registrations.

2.There was 1 trademark in the category of computer hardware, group number: 0901) that was selected for registration, accounting for a large proportion of registrations.

3.There is 1 trademark in the category of switch (electrical, group number: 0913) that was selected for registration, and the registration rate is reached.

4.There was 1 trademark in the category of wireless adapter (group number: 0913) that was selected for registration, accounting for a proportion of registrations.

5.There was 1 trademark in the category of choosing to register (timer for sorting and de-sorting, group number: 0902), and the proportion of registrations was reached.

6.There was 1 trademark in the category of "Network Processor for the Test and Development System of Computer Chips for Computer Hardware Systems, Group No. 0913", and the registration rate was reached.

7.There was 1 trademark in the category of computer storage devices, group number: 0901) that was selected for registration, accounting for a large proportion of registrations.

8.There was one trademark in the category of "Optical Transport Network Equipment (Computer) for the Test and Development System of Computer Chips for Computer Hardware Systems", Group No. 0907) that was selected for registration, accounting for a large proportion of registrations.

9.There was one trademark in the category of Ethernet equipment (computers) for testing and development systems of computer chips for computer hardware systems, group number: 0907) that was selected for registration, accounting for a large proportion of registrations.

10.There was 1 trademark in the category of ((computer) memory, group number: 0901) that was selected for registration, accounting for a large proportion of registrations.