when use VoIP, the default codec is g.729, and the pure data rate is 8k, but when I use rsvp to check, the rsvp preserve 24k per session. Is the overhead (24-8=16k) is all rtp overhead? If so, and I use ip rtp header-compression command in the interface, how many bandwidth can I save with this command? can any body tell me? thank you!
The use of G.729 coder-decoder (codec) allows the compression of voice calls to 8 kb. However, VoIP networks introduce header-based overhead, which raises the size of the voice packet to 60 bytes and the required bandwidth to approximately 24 kbps. The use of compressed real-time protocol (cRTP) reduces the size of the header to 2 to 4 bytes per packet and the bandwidth requirement to 11.2 kbps per G.729 compressed call (Figure 4), thus increasing call capacity.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...