Mro- tek ltd is offering tdm access multiplexer, model ecat01-l . It is specially developed for multiplexing up to 4 e1 channels over single 100base fx fast ethernet fiber link. It provide low cost solution for transporting 4 e1channels transparently over single fast ethernet fiber for point to point applications. This tdm access multiplexer conforms to itu g.703, g.823, g.824, gr-499 core. Some key features of this tdm access multiplexer are as follows: