TCL IP phone User Manual page 21

TCL-IP (8) User Manual
6.what kinds of voice codec can be selected for TCL-IP8?
Answer：The default voice codec of TCL-IP8 is
PCMU(G.711u).PCMU and PCMA both can supply better quality
voice，but possess a big bandwidth which is up to 64kbps.If the
network bandwidth is lower，you should select another lower Bit rate
voice codec，for example: G.723 or G.729, which possess the lower
bandwidth than the others(G.723 only for 5.3K/6.3K,G.729 for 8K)，
and also can get better quality voice .If bandwidth is enough, select
PCMU or PCMA，or even G.722 (G.722.1 can supply perfect
quality voice) will be better.
TCL communication
21
www.tclcomm.cn