4.13.4. T.38-Only Transcoding

To initiate a T.38-only call, the audio capabilities must be specifically disabled by the application by specifying a capability of GCCAP_AUDIO_disabled in the capabilities list. In this call scenario, no audio transcoding is done before or after the T.38 transmission. The call is initiated and terminated while using the T.38 transcoder; no transition back to an audio transcoder is necessary.

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