Hi, I have a FreeSWITCH 1.4.15 (from debian repositories), but I've been having a problem for a long time (with older versions too) and I don't know if it is a configuration problem or a bug. The FreeSWITCH runs on an openvz machine and this server is not overloaded. Before testing with trunk branch I want to share my problem looking for help to solve it (it's in production) I have an issue with some providers that send to my FreeSWITCH CN packets. When this happens, the other call leg has a terrible delay and bad quality sound.It starts with a little delay, but during the call the delay increases more and more. Capturing with wireshark and decoding rtp stream I can see 31% of packets dropped by Jitter Buff in the leg in wich the delay occurs (from FreeSWITCH IP to the other endpoint) I don't have any problem when the provider doesn't send CN packets. If I configure FreeSWITCH not to negotiate "comfort noise" (profile: supress-cng=true), the provider sends cn packets too. I tried with no luck variables such as: - send_silence_when_idle (with values "400" and "true") - bridge_generate_comfort_noise=true The rtp related params of my sofia profile are: rtp-timer-name=soft inbound-zrtp-passthru=false (don't use zrtp) rtp-timeout-sec=300 rtp-hold-timeout-sec=1800 inbound-late-negotiation=true NDLB-allow-bad-iananame=true supress-cng=true vad=none t38-passthru=true inbound-codec-prefs=PCMA,PCMU,G722,GSM outbound-codec-prefs=PCMA,PCMU,G722,GSM In the dialplan the only variables that I set related with rtp are: set inherit_codec=true export absolute_codec_string=${ep_codec_string} Thanks in advance -- Jose Fco. Irles Durá