Thanks Rommel for the answer. I am not sure which codec I will be using because I am not the one who will be configuring the router. My plan is to pay someone for that part of the work after I do everything else such as the phyical interconnectivity myself. Let us assume that I don’t want to compromise for the quality of the voice. Could you please then suggest a codec, the best one for quality of the voice and then let me know how many voice lines I can get from my T1 data line.