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-rwxr-xr-xinclude/asterisk/dsp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asterisk/dsp.h b/include/asterisk/dsp.h
index 2f28c5d6e..916e24898 100755
--- a/include/asterisk/dsp.h
+++ b/include/asterisk/dsp.h
@@ -18,6 +18,7 @@
#define DSP_FEATURE_BUSY_DETECT (1 << 1)
#define DSP_FEATURE_CALL_PROGRESS (1 << 2)
#define DSP_FEATURE_DTMF_DETECT (1 << 3)
+#define DSP_FEATURE_FAX_DETECT (1 << 4)
#define DSP_DIGITMODE_DTMF 0 /* Detect DTMF digits */
#define DSP_DIGITMODE_MF 1 /* Detect MF digits */