Hello, I am planning to create a conference server where calls (sip or pstn) are received at one server and conference mixing happens at another(these could be same machines or different ones depending on load). For this implementation, I needed your help in understanding which of the following are major CPU and memory consuming activities: a) Encoding/Decoding, b) Re-sampling, c) Echo Cancellation, d)Conferencing. And also I would like to know how would I achieve a UA which would initially act as a terminating UA and accept a call, take a passcode using DTMF, do the passcode validation and then would act as a gateway which would be transcoding and transrating the audio media between the client and the conference server. Regards Manmeet
