Telephony and private line/leased line traffic are conventionally carried over connection-oriented synchronous or plesiochronous networks (which we will loosely refer to as TDM networks). With the proliferation of packet-switched networks (PSNs), there is a need to integrate TDM services into a unified PSN infrastructure. This integration requires emulation of TDM circuits within the PSN, a function that can be carried out using Pseudowire technology (and its various subsets TDMoIP, CESoPSN, SAToP, TDMoEthernet, TDMoMPLS, ATMoIP). This emulation must ensure Quality of Service and voice quality similar to those of existing TDM networks as well as preserving signaling features. more>