[Asterisk-Users] What does RELAXDTMF do?

[Peter J Dean]

Thanx for everyone's passionate responses, and apologises for not  
replying sooner.

1. Based on what I have seen I take it noone is sure of what the true  
purpose and the effects of the relaxdtmf parameter offer.
2. I am using both a mixture of VSP's and SPA3K's, but primarily it  
is the VSP's
3. And as for tweaking the output level's, I see no options being  
provided within the IAX and SIP configuration files, and not really  
concerned with the SPA3K's at this time since they are fail-overs.
4. Since the bulk of my issues are through the IAX2/SIP methods for  
DMTF and Asterisk has direct issues with DTMF, I just hope that v1.4  
will be released sooner rather than later.


On 09/06/2006, at 5:11 AM, Martin Joseph wrote:

>
> On Jun 8, 2006, at 3:13 AM, Peter J Dean wrote:
>
>> I have an issue with DTMF. DTMF is being partly recognised by some  
>> external IVR systems (banks, billing, etc), other IVR systems have  
>> intermittent issues. Call our VSP directly and using their IVR  
>> system without issue, and our internal IVR works just fine.  
>> Currently i have all voip devices using RFC2833, which is what is  
>> recommended, and thus the sip.conf file has dtmfmode=rfc2833 and  
>> relaxdtmf=yes.
>>
>> I have not seen any information that clearly defines the purpose  
>> of the relaxdtmf parameter in the sip.conf file, and wondering of  
>> flicking it from yes to no will have an impact, and if so what  
>> sort of impact will it have?
>>
> Dunno about that, but usually the gain of the output is the most  
> likely source for this kind of intermittent issue.  If you can  
> tweak your output level a hair each way and retest, you might find  
> you are ok.
>
> Just a thought,
> marty
>
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