| reply to testr773
Re: you need Good explanation. As to bandwidth requirements, however, a good rule of thumb is that you need about 160kbps of upstream bandwidth for uncompressed G.711, and about 50kbps for G.729 or one of the other compression schemes. Double that if you plan to use 3-way calling. So you buy quite a bit of bandwidth for a small drop in perceived fidelity. In fact, unless you have bandwidth to spare, the call quality is likely to be better using compression. The RTP used for VoIP data streams does no error checking, so if bandwidth is inadequate, the packets are simply dropped.
I found this explanation helpful:
»cnscenter.future.co.kr/resource/···ment.pdf |
