Hi, I am having trouble getting my configuration right so that I can have a call transcoded to Speex wideband from another codec (alaw or g.722). If both phones use Speex wideband with no transcoding required by FS, the call succeeds though. My codecs are listed in vars.xml as follows: <X-PRE-PROCESS cmd="set" data="global_codec_prefs=speex@32000 @20i,speex@16000h@20i,G722,G7221@32000h,G7221@16000h,PCMA,PCMU,GSM"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=speex@32000 @20i,speex@16000h@20i,G722,G7221@32000h,G7221@16000h,PCMA,PCMU,GSM"/> However if I make a call from a phone A using, say, g.722 to a phone using Speex wideband, the SDP in the invite from phone A to phone B does not include Speex wideband. In fact the SDP includes speex/8000 even though speex/8000 is neither enabled in vars.xml, not in either of the phones. Here is the codec listing in the SDP of the INVITE from Freeswitch to phone B (from Wireshark) : Media Attribute (a): rtpmap:9 G722/8000 Media Attribute (a): rtpmap:99 SPEEX/8000 Media Attribute (a): rtpmap:115 G7221/32000 Media Attribute (a): fmtp:115 bitrate=48000 Media Attribute (a): rtpmap:107 G7221/16000 Media Attribute (a): fmtp:107 bitrate=32000 Media Attribute (a): rtpmap:8 PCMA/8000 Media Attribute (a): rtpmap:0 PCMU/8000 Media Attribute (a): rtpmap:3 GSM/8000 Media Attribute (a): rtpmap:101 telephone-event/8000 Media Attribute (a): fmtp:101 0-16 Media Attribute (a): rtpmap:13 CN/8000 Media Attribute (a): ptime:20 Could anyone tell me what I am doing wrong please? Many thanks Bruce