Shulou(Shulou.com)06/03 Report--

Main details of big data wavelength Division Transmission Project Design

Big data era has been several years, wave division transmission is used by more and more people, and even some backbone network transmission has been inseparable from wave division transmission. Many people use it, so there are many specifications, so some engineering designs are also troubling more and more people. Today, I would like to share with you what engineering information wave division transmission needs to know at the initial stage of making a plan. just take a look at it, just for beginners' reference.

1. What is the type of data transmitted in the whole wavelength division system?

This is because CATV service and PON service cannot be transmitted in wavelength division. Therefore, we should first understand this in the early stage, otherwise we will be busy in vain.

2. Is the transmission link single-fiber or double-fiber?

Single and double fibers determine the type of wave division and the number of channels.

3. How many kilometers is the whole transmission distance? Is there a relay station?

We can estimate whether this wavelength division transmission project can be carried out. If there is no relay station and the distance is very long, then there is nothing we can do about it.

4. What is the distance between each station and what is the measured attenuation value of the line?

In the case of a relay station, it is necessary to understand the distance of each station, the size of the measured data between each station when equipped with DCM dispersion compensator, so that it can be used when equipped with EDFA fiber amplifier.

The measured data must be measured, because the optical fiber years are different and the manufacturers are different, so simply calculating according to the index value will have a great difference, which will directly affect the selection of EDFA optical fiber amplifier and lead to the failure of the whole link.

5. Do you want to get up and down business between sites?

If the adjacent or cross stations want to get off the service, it is necessary to configure the OADM wavelength division system in the intermediate station to facilitate the up and down service.

6. How many waves of traffic will be transmitted on the whole link? What is the rate of single wave?

The number of waves transmitted determines the selection of wave division equipment, whether it is 40 wave equipment or 16 wave equipment, it is a good choice. The single wave rate determines the selection of OTU wavelength converter, which is 2.5G, 4.25G or 10G.

7. Whether to use CWDM coarse wavelength division or DWDM dense wavelength division transmission, whether the channel expansion should be considered in the future?

CWDM coarse wavelength division can only transmit 16 waves, and can not be amplified by EDFA, so coarse wavelength division is a small capacity and short distance wavelength division transmission, and it is necessary to transmit long distances. It is expensive to add OEO optical fiber relay to each segment. Any more words will use DWDM dense wavelength division, of course, DWDM dense wavelength division can also do small capacity wavelength division transmission, more importantly, he can use EDFA optical fiber amplifier, in ultra-long distance wavelength division transmission is widely used, the later expansion is also very convenient, only need to expand the capacity of OTU service board on it, plug and play, quite convenient.

Attachment: http://down.51cto.com/data/2365972

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