On Feb 15, 2005, at 10:09 AM, Florian Lefeuvre wrote:
Hi all,
I use a GSM device to send dtmf on my asterisk system (via SIP). the codec I use is ulaw (or a-law). dtmf mode is INBAND. relaxmode is on. but most of the case, I 'missed' some DTMF or I 'double' one. as anybody as seen this before? is there any way to prevent this
I suffer from this problem all of the time but I'm configured for out-of-band dtmf on the asterisk side thanks to IAX2 trunking. I think the problem is GSM or maybe cell phones in general. I know this has been discussed before.
-mark
Thanks for your response mark,
I find the compilation option RADIO_RELAX.
this option change a threshold in DTMF detection (function dtmf_detect in dsp.c)
I remark an big improvement in the detection of the dtmf over GSM.
have you ever test this option?
RADIO is obscur for me, does it mean all wireless device?
Florian
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