Matthew Rubenstein wrote:
I connect to a PSTN carrier over SIP which requires me to connect with
a g729 codec. I'm using them for just robocalling: Asterisk server
originates calls which play a prerecorded file. Can I pre-encode those
stored files in g729 so they don't need to be encoded for each call?
Yes, if you are using asterisk 1.4 then in the CLI you can type:
convert
<filename-including-path-if-not-in-asterisk-sounds-folder>.<original
extension> <filename-including-path-if-not-in-asterisk-sounds-folder>.g729
so convert recording.ulaw recording.g729
Will make a permanent copy not requireing transcoding again.
If you are using asterisk 1.2, there is a tool on the asteriskguru site
to transcode the file for you.
http://www.asteriskguru.com/tools/audio_conversion.php
If
so, do I need a g729 license for each call, or just a license for the
preencoder?
You will need a license for when the file is encoded, after that if it
is played back on a g729 call you will not need a license. Asterisk will
automatically choose the lowest cost file to playback (which one in
natvie format will be).
> If the robocalls accept incoming DTMF, do I need g729
licenses for those calls?
You only need a license when you are transcoding, if you have an
incoming call that is g729 and you terminate the call to a device that
is configured to use g729 then you will not need a license.
If you are recording the call then you will need (possibly 2) llicenses.
DTMF signals do not require a license (although the device generating
them needs to be configured to use RFC 2833 or Out of Band for DMTF
encoding).
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