Some Critical Techniques in TDMoIP E1 Mux

TDMoIP is a novel method of transporting arbitrary circuit-based services over IP-based networks. TDMoIP can support TDM-type traffic(from T1/E1 to SONET speeds) as well as a variety of legacy data services. QoS and voice quality are similar to those of exiting circuit-based networks and all signaling features are preserved. In this paper, we carry out beforehand study for the development of key technologies for TDMoIP, and give the implementation scheme of IPmux-4 for E1 circuits.