[asterisk-users] Asterisk DTMF RFC2833 issues
BryantZ at zktech.com
Fri Aug 27 09:17:19 CDT 2010
I have posted a question on the asterisk dev board about this issue but I
want to see if any users have run up against this.
This issue is that when calls are run through Broadvox and Level 3 the
in-call rfc2833 dtmf is not reliable. This occured for me on asterisk
version 220.127.116.11, 18.104.22.168 it appears to have been fixed when I went to
22.214.171.124 but broken again in 126.96.36.199-rc1.
I have tested with Grandstream and SNOM phones and both fail 90% of the
time Unidata phones fail 10% of the time Audiocodes and Grandstream ATA's
appear to not suffer from the issue on any version of asterisk.
What happens is when a caller trys to enter DTMF keys durring a call the
far end routed through these carriers do not detect all of the digits. We
did captures with broadvox and here is what they have said.
Per our phone conversation I have attached our signaling capture. The issue
is that after we receive a RTP packet, the RTP event that follows needs to
be sent within 100 ms. Anything greater than 100 ms will not be received.
Network Operations Center
Any one else seen this? Any ideas?
Please note you must be being proxied directly to the carrier so your RTP
flows direct other wise you will not see the issue.
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