Optical fiber transceiver A,B terminal meaning interpretation


A friend recently asked, what is the meaning of the letters A and B on the fiber optic transceiver type or transceiver module?

Today fly chang technology xiaobian to introduce for you, transceiver in A,B terminal letters of the true meaning.

Let's take a look!

First of all, there are two types of fiber transceivers according to the number of fiber cores, one is single-mode dual-fiber fiber transceivers, the other is single-mode single-fiber fiber transceivers.

We talked about A,B.Only single-mode single-fiber transceivers are available.Since a single-mode single-fiber transceiver is transmitted through a single fiber core, both transmitting and receiving light are transmitted through a single fiber core at the same time.

In this case, two wavelengths of light must be used to distinguish normal communication.

Therefore, there are two wavelengths of light emitted by the optical module of single-mode single-fiber transceiver, generally 1310nm/1550nm, and 1490nm/1550nm for the distance.

The two ends of the interconnection of a pair of transceivers will then differ, with one end transmitting 1310nm and receiving 1550nm.

The other end transmits 1550nm and receives 1310nm.

So easy to distinguish between users, generally will be replaced by letters.

The A end (1310nm/1550nm) and the B end (1550nm/1310nm) appear.

Users must be paired with AB.Not AA or BB connection.

Shenzhen Wirenet Telecom Technology Co., Ltd., has 10 years'experience on manufacturing and supplying fiber optic cabling system products.