[asterisk-bugs] [JIRA] (ASTERISK-21170) DTMF timestamp issue

[NITESH BANSAL (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-21170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

NITESH BANSAL updated ASTERISK-21170:
-------------------------------------

    Attachment: DTMF-TIME-STAMP-PATCH.tar.gz

This test case can be reproduced by making a test case with SIPP.
I am attaching SIPP scripts for audio calls between A and B and corresponding PCAPs played by two parties.
With this PCAP, a huge jitter is observed in the RTP stream going towards B.
                
> DTMF timestamp issue
> --------------------
>
>                 Key: ASTERISK-21170
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21170
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_rtp_asterisk
>    Affects Versions: SVN
>         Environment: x86_64 Debian Squeeze
>            Reporter: NITESH BANSAL
>
> Asterisk assumes that every RTP packet is 20 ms apart which does not work for the start and stop of DTMF and it causes issues for the equipment which tries to render the RTPEvent DTMF back into Inband.
> High jitter values have been observed for the DTMF packets.

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