Summary:	ASTERISK-05771: [patch] Chat-cord: Off Hook + DTMF detection
Reporter:	Vincent de Groot (vdegroot)	Labels:
Date Opened:	2005-12-03 15:21:29.000-0600	Date Closed:	2011-06-07 14:03:10
Priority:	Major	Regression?	No
Status:	Closed/Complete	Components:	Channels/chan_oss
Versions:		Frequency of Occurrence
Related Issues:
Environment:		Attachments:	( 0) oss.patch
Description:	Based on the hack of Onno Kortmann http://www.okay.dyndns.org/okhp/linux/asterisk/ This patch makes it possible to use a chat-cord ( http://www.grynx.com/index.php/projects/build-your-own-chat-cord/ ) in combination with an normal telephone to use as device for Asterisk. - Off hook detection based on the difference in stddev of noise levels (off/on-hook) - Use the buttons of phone to send DTMF codes (numbers) to driver ****** ADDITIONAL INFORMATION ****** Changes compared with the hack of Onno: - Onno's hack was written for the old OSS channel (chan_oss_old.c) This one is working for the current chan_oss.c - This patch has no support for generating a ring-tone Compile with: In Asterisk Makefile OPTIONS += -DRADIO_RELAX In chan_oss.c #define TRYOPEN 1 Extra parameters in /etc/asterisk/oss.conf Use debug=0x4 in oss.conf to view the stddev values of the signal to fine tune the parameters below. vol_divide=3 hd_disp_interval=30 hd_hl_threshold=60 hd_ll_threshold=40 hd_hl_seqmin=20 hd_ll_seqmin=20 hd_hl_threshold: The pick-up threshold level, a value just below the observed values when the phone is off-hook but no one is talking. hd_ll_threshold: A value just above the value that appears when the phone is hung up. More info about fine tuning at: http://www.okay.dyndns.org/okhp/linux/asterisk/
Comments:	By: Russell Bryant (russell) 2005-12-05 14:55:31.000-0600 Since this patch is based on the work of someone else, we will probably need a disclaimer from both of you to consider putting this into the tree. By: Olle Johansson (oej) 2006-01-04 05:20:55.000-0600 No reply for over a month. Closing time.