1.Extension E1 links over IP networks; 

2.Whether the transmission signal is voice, data, image, signaling, will be able to achieve good quality results; Maintenance 

3.E1 clock synchronization via IP networks; 

4.Compared to VOIP and ATM, TDM over IP converter networking simple and inexpensive; 

5.It supports all traditional PBX; 

6.Compared to VOIP, the sound has good quality and small delay; 

        One of TDM over IP converter Pictures: