Hi I am using a Voicetronix Openline and trying to get busy detect working for South Africa. Asterisk definitions are: VPB_TONE=BUSY,P,400/500,0/500 and this works although it is to sensitive and hangs up when pressing a DTMF tone. If I use the Voicetronix definition: VBP_TONE=BUSY,P,400,100,500 no hangup takes place at all. Our busy tone is as follows: 400Hz, -8dBm, on for 0.5 seconds off for 0.5 seconds. Can someone help with this? Thanks Doug