Ok. I've done more research and testing and here are the details. It is using the dialparties.agi (http://www.sprackett.com/asterisk/) file to dial . Originally with the dial options "tr". I changed the options to "Tt" but no change. Transferring internal extensions between each other works fine. Example: 201 calls 202. 201 transfers 202 to 203. Transferring the IAX trunk to other internal is weird, as per my previous email. Example: DID calls 201. 201 transfers DID to 202. DID is either hungup or half connected (DID gets connected to 202, but 202 only hears music. DID can hear 202, even though 202 is hearing music). At the moment I can only transfer trunk calls through the "parking" system, which is a pain to teach people about... I'm really stumped on this one. Mike Sander Operations Manager Suite 4 / 38-48 Waterloo St Surry Hills N.S.W 2010 Phone:(02) 8307 8877 Fax:(02)93182254 Mobile:0401 010 289 Email: mike@corporatebankinginternational.com Website: www.corporatebankinginternational.com -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 19/01/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 19/01/2005