Hi, In what direction should I start looking so that I can let Asterisk forward (pass through) sip calls containing "strange" codecs without transcoding? (Not just the G.729, which already seems to have some sort of support in Asterisk.) Are there some config files to fix, or should I reprogram/recompile? What files should I start looking at? Thanks in advance, Matti Zemack, BBC R&I, Kingswood, UK http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.