Release Notes 2.1.9
From Pbxnsip Wiki
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ACK branch value for subsequent INVITE
The ACK branch value of the Re-INVITE ACK was identical to the branch value of the first INVITE ACK (the CSeq value was practically ignored). This was causing problems when using Mediatrix FXS adapters when switching to T.38. The transaction would time out and the FXS adapter would send a disconnect after 32 seconds.
There is also a workaround available for the FXS adapter, however we recommend to upgrade to 2.1.9.
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More Simple CDR options
Two more options for date and time have been added.
