Asterisk - Asterisk & Sangoma Hardware DTMF

Sangoma hardware DTMF is now supported starting from 3.3.0 wanpipe release. The Hardware DTMF is supported by the Octasic Hardware Echo/DTMF DSP. Therefore in order to take advantage of hardware DTMF you must have one of Sangomas AFT A200/A400,101/2/4/8 D cards (with onboard hardware echo cancelation)

Requirements:

1. Download latest 3.3.X release or greater
2. Install above wanpipe release:
   -> follow standard wanpipe installation instruction
   
3. Configure wanpipe devices using wancfg_zaptel script.
   -> run: /usr/sbin/wancfg_zaptel
   -> follow standard wanpipe config instructions
   -> select hardware dtmf option
4. Start wanpipe
   -> wanrouter start
5. Configure zaptel
   -> ztcfg
6. Start Asterisk
   -> asterisk