Hi. Can you say, what codec type does IP Phone 7910 support and how can I restrict ip phone to use g711[a|u]-law or g729r8 in case of using ip phones with ip keyswitch feature. I didn't find link which exactly explains codec managment on ip phones.
Have a look at device pools and regions this will explain something to as far as codecs go they are rated with a mos score g.711 around 4.1 and uses pulce code modulation and is 64kbps add the headers on a ethernet lan and you will see packet sizes of 214 bytes without the ethernet header 14bytes you get 50x200byte =10000(packets per second) x8 for bits =80kbps stream some one correct this if its wrong anyway you are enclined to use g.729 over wan links as it is less bandwith hungry though it requires alot more processing ACELP is the coding compression method used 3.7 is the mos score be aware that There are drawbacks to compressing voice. One of the main drawbacks is signal distortion due to multiple encodings (called tandem encodings). For example, when a G.729 voice signal is tandem encoded three times, the MOS score drops from 3.92 (very good) to 2.68 (unacceptable). Another drawback is codec-induced delay with low bit-rate codecs.
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