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rtpengine: document new T.38 options

Richard Fuchs authored on 25/03/2020 13:56:56
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@@ -2404,6 +2404,23 @@ rtpengine_offer();
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 				and used for transcoding on the offering side.Useful only in combination with codec-transcode. <emphasis>all</emphasis> keyword
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 				can be used to mask all offered codecs
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 				</para></listitem>
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+				<listitem><para>
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+				<emphasis>T.38=decode</emphasis> - If the offered &sdp; contains a media section
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+				advertising T.38 over UDPTL, translate it to a regular audio media section
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+				over RTP. By default, PCMU and PCMA will be used as audio codecs, but that can
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+				be overriden using the codec options described above. Other transport protocols
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+				(e.g. SRTP) can also be selected in the same way. If the offered &sdp; does not
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+				contain a T.38 section, then this flag has no effect.
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+				</para></listitem>
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+				<listitem><para>
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+				<emphasis>T.38=force</emphasis> - Any audio media section (over RTP) in the
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+				offered &sdp; will be translated into a T.38 section over UDPTL.
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+				</para></listitem>
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+				<listitem><para>
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+				<emphasis>T.38=stop</emphasis> - Stops a previously established T.38 to audio
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+				gateway and reverts the session back to media passthrough. This is useful when
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+				handling a rejected T.38 offer.
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+				</para></listitem>
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 			</itemizedlist>
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 			<para>
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 			 Check also the documentation of RTPEngine, these flags are documented there as well: