Hi, I have installed elastix 1.5.2 and I have to apply the Thomson patch for asterick 1.4 for call pick up by BLF. In the instruction of thomson manual I have : 1) Installing the patch: cd /usr/src/asterisk/channels ; move to the correct directory cp /pendrive/chan_sip.c . ; cp the file provided in the *.zip cd .. ; move to the correct directory make install ; compile Asterisk again but I'm unable to find the dir /usr/src/asterisk/channels. In the thomson zip file there are 2 files chan_sip(modif).c and chan_sip(orig).c , what file I have to use ? Sorry but I'm using elastix from few days.