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-rw-r--r--include/asterisk/dsp.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asterisk/dsp.h b/include/asterisk/dsp.h
index 3334152..78c9a74 100644
--- a/include/asterisk/dsp.h
+++ b/include/asterisk/dsp.h
@@ -45,7 +45,8 @@
#define DSP_FAXMODE_DETECT_CNG (1 << 0)
#define DSP_FAXMODE_DETECT_CED (1 << 1)
-#define DSP_FAXMODE_DETECT_ALL (DSP_FAXMODE_DETECT_CNG | DSP_FAXMODE_DETECT_CED)
+#define DSP_FAXMODE_DETECT_V21 (1 << 2)
+#define DSP_FAXMODE_DETECT_ALL (DSP_FAXMODE_DETECT_CNG | DSP_FAXMODE_DETECT_CED | DSP_FAXMODE_DETECT_V21)
#define DSP_TONE_STATE_SILENCE 0
#define DSP_TONE_STATE_RINGING 1