MToP stands for Mobile Transport over Packet and is a framework developed by Cisco for expanding the IP/MPLS network of mobile operators from their core to their edge (Radio) layer. In this framework, the mobile operator will have an IP/MPLS network which is being used for carrying all kinds of traffic in edge and core. One of the main issues for mobile operators is handling different technologies for use in different stages of their network evolution. In other words, the mobile operator has to deal with TDM, ATM, FR, and Ethernet technologies when using 2G, 2.5G, 3G, and NGN. Replacing the network infrastructure from TDM to FR to ATM to ... will force a lot of CAPEX and OPEX. But with MToP in place, the operator can leverage the AToM capability of IP/MPLS and build a general purpose transport network which can be used for any kind of transmission technology. In this framework, there will be pseudowires created inside the IP/MPLS network and each PW will carry a different kind of traffic. For simpler cases, the operator can leverage VPLS instead and build an L2 broadcast domain across its MPLS network or it can implement L3 MPLS VPNs instead. Of course L3 VPNs can be used only when different edge sites are communicating over L3 protocols like IP and not when these sites use L2 technologies for communication.