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https://reviewboard.asterisk.org/r/3657/
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Review request for Asterisk Developers.


Bugs: ASTERISK-23908
    https://issues.asterisk.org/jira/browse/ASTERISK-23908


Repository: Asterisk


Description
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When using FEC error correction with span=3 and entries=4 asterisk will try to 
repair in packet with sequence number 5 because it will see that packet -4 is 
missing. The result is that Asterisk will forward garbage packets that can 
possibly kill the fax.

This patch adds a check to see if the sequence number is valid before checking 
if the packet is missing


Diffs
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Diff: https://reviewboard.asterisk.org/r/3657/diff/


Testing
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Replayed the T.38 FEC callflow using a version of SIPP patched to understand 
m=image for pcapplay


Thanks,

Torrey Searle

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