Currently, I am facing problem doing call transfer using QSIG in MD110. I understand that if I need to do "call transfer by join" in MD110 required Manufacturer Specific Information to be included in my IE message before I send it over to MD110 from my application. Is there anyone can help me by providing the IE spec needed to do this? I heard that MD110 IE is using ASB501 format. Is this true? and where can I get the spec for this?