CallDeflection

Hi to all
Does anyone know how to use the new function by “Asterisk 1.8” - REDIRECTING
•Added CallRerouting/CallDeflection support for Q.SIG, ETSI PTP, ETSI PTMP.Will reroute/deflect an outgoing call when receive the message.

https://wiki.asterisk.org/wiki/display/AST/New+in+1.8#Newin1.8-libprichanneldriver(chandahdi)DAHDIchanges

http://kb.digium.com/articles/Configuration/Two-B-Channel-Transfers?retURL=%2Fapex%2FknowledgeProduct%3Fc%3DTelephony_Interface_Card&popup=false

Andi