Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 309077)
+++ channels/chan_sip.c	(working copy)
@@ -4031,6 +4031,12 @@
 		return;
 	}
 
+	/* disable pointless warning about inband dtmf if faxdetect is enabled */
+	if ((ast_test_flag(&p->flags[0], SIP_DTMF) != SIP_DTMF_INBAND) &&
+            (ast_test_flag(&p->flags[0], SIP_DTMF) != SIP_DTMF_AUTO)) {
+			ast_dsp_disable_inband_dtmf_warning(p->dsp);
+	}
+
 	ast_dsp_set_features(p->dsp, features);
 	if (global_relaxdtmf) {
 		ast_dsp_set_digitmode(p->dsp, DSP_DIGITMODE_DTMF | DSP_DIGITMODE_RELAXDTMF);
Index: include/asterisk/dsp.h
===================================================================
--- include/asterisk/dsp.h	(revision 309077)
+++ include/asterisk/dsp.h	(working copy)
@@ -69,6 +69,9 @@
 struct ast_dsp *ast_dsp_new(void);
 void ast_dsp_free(struct ast_dsp *dsp);
 
+/*! \brief disable dtmf inband warnings */
+void ast_dsp_disable_inband_dtmf_warning(struct ast_dsp *dsp);
+
 /*! \brief Set threshold value for silence */
 void ast_dsp_set_threshold(struct ast_dsp *dsp, int threshold);
 
Index: main/dsp.c
===================================================================
--- main/dsp.c	(revision 309077)
+++ main/dsp.c	(working copy)
@@ -401,6 +401,11 @@
 	tone_detect_state_t ced_tone_state;
 };
 
+void ast_dsp_disable_inband_dtmf_warning(struct ast_dsp *dsp)
+{
+	dsp->display_inband_dtmf_warning = 0;
+}
+
 static void mute_fragment(struct ast_dsp *dsp, fragment_t *fragment)
 {
 	if (dsp->mute_fragments >= ARRAY_LEN(dsp->mute_data)) {