Dear list, I have an Asterisk 1.4 SIP server with Twinkle and X-Lite voip clients in my LAN talking among them. Both clients use SPPEX codec. I notice the following features and I have these two questions: 1) X-Lite uses SPEEX codec between 14Kbps to 23Kbps. Can I configure a lower bitrate here, i.e. 8 Kbps ??? 2) Twinkle has more manageable features for SPEEX codec, I have "VAD Narrow Band payload type = 97". How can I know the bitrate that Twinkle uses with this setting ??? Thanks a lot !!! Alejandro