[Freeswitch-users] Inband DTMF Problem
mike at jerris.com
Thu Nov 6 07:25:26 PST 2008
On Nov 6, 2008, at 10:08 AM, Klaus Teller wrote:
> OK. I updated and tried flushing the DTMFs before playing the
> commands and it works. Thanks.
> Now, i feel there is a more general issue of scalability around DTMF
> (both inband as well as RFC2833) handling in Freeswitch. What do you
> guys think?
> What i've been working on is a tool for testing voice applications.
> The tool connects via Freeswitch to the voice platform and simulates
> the behavior of the user. We've tried the tool with the most
> reliable voice platforms out there as well as with some less reliable.
> What we observe is that in all cases, we can run 100 calls
> sequentially without problem. But as soon as we have 10 calls in
> parallel, digits start to get lost. Is this something you think
> should be expected?
> I must note that there are a lot of DTMF reading and sending going
> on. In fact, the testing tool doesn't use voice recognition to
> assert whether the voice application is in the right state or not.
> Instead, we instrument the voice application to emit some DTMF
> sequences that are uniquely mapped to prompts. So there DTMF
> sequences are read by the testing tool to determine if the voice app
> is in the right state or not.
> Looking forward to your feedback.
You should have no expectation whatsoever that inband dtmf will ever
scale, as for rfc2833, I tend to doubt that there is any scaling
issues there. Do you have any traces and accompanying freeswitch
debug logs that show this behavior? Is it reliably reproducible?
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