TDM-to-packet conversion
TDM-to-packet conversion is the process of converting a digital signal in TDM format (typically a 64 Kbit/second signal encoded with mu-law or A-law compression) into packets (typically RTP packets) for carrying over a packet network such as the Internet.
The conversion process may include recoding with a different codec, silence suppression, comfort noise generation and other tricks that can decrease the bandwidth requirement or improve the perceived voice quality of the result.
Note that this is a conversion of the signal, not a tunnelling, unlike TDM over IP, which aims at transporting a TDM signal unchanged across an IP network.
See also Voice over IP.
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