Whenever it is necessary to extend Ethernet over the long distances, it come done in multiple ways, using multiple solutions available at the market. Modern solution, would be to use high-speed fiber networks as the intermediate tool for ensuring high speeds and stable signal.

And this is a place where our STM-1 to Ethernet converter series are coming in to help. The main thing to remember here is that STM-1 protocol, or leased line works as extension media for a Ethernet, which then already can carry LAN2LAN, or any other Ethernet and IP traffic. This is why we called these products as STM-1 to Ethernet converter.

And note, that you can have your physical Ethernet interface to be as Fast Ethernet 10/100 type, as well as Gigabit Ethernet type. In first case, you can use FE type STM1 converter, and latter case – GE type.

Following standards is important for equipment to be able to communicate with no troubles, which is why we will talk about using STM-1 as Ethernet extension.

STM-1 is a fiber optic network standard with a top bit rate of 155.52 Mbit/s. It is typically used for LANs extension as in the picture above. So. you can see that Ethernet get’s transferred over STM-1.
As the one can see from the figure, the converter (AN-STM-1-GETH) connects to the LAN from the one side, while extending network on great distances using fiber optics from the other side. At the receiving end, the same converter transforms signal back to traditional Ethernet, so it can be freely used in the LAN. This particular model, shown in the figure above is intended for Gigabit Ethernet. However not all networks have such great speeds, needed to be extended. In this scenario, there is AN-STM-1-ETH converter that works with 10/100 Ethernet while providing the same functionality.

Now, what if your case is exactly opposite, and you need send STM-1 over Ethernet , and not vice versa, as discussed above?

Then it’s really a different story, and much more complicated equipment then needs to be used and it’s STM-1 over IP, or AN-TDM-IP-STM1.

See how in this case your scheme will look like:

So, as a conclusion, always be checking, if you want send Ethernet over STM-1, or STM-1 over Ethernet, since in both cases sometimes folks mean the “STM-1 to Ethernet converter”.