diff --git a/libs/freetdm/src/ftdm_io.c b/libs/freetdm/src/ftdm_io.c
index ec6c2fb757..099035409f 100644
--- a/libs/freetdm/src/ftdm_io.c
+++ b/libs/freetdm/src/ftdm_io.c
@@ -3457,7 +3457,7 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_command(ftdm_channel_t *ftdmchan, ftdm_co
 					ftdmchan->dtmf_on = val;
 					GOTO_STATUS(done, FTDM_SUCCESS);
 				} else {
-					snprintf(ftdmchan->last_error, sizeof(ftdmchan->last_error), "invalid value %d range 10-1000", val);
+					ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "invalid value %d range 10-1000", val);
 					GOTO_STATUS(done, FTDM_FAIL);
 				}
 			}
@@ -3471,7 +3471,7 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_command(ftdm_channel_t *ftdmchan, ftdm_co
 					ftdmchan->dtmf_off = val;
 					GOTO_STATUS(done, FTDM_SUCCESS);
 				} else {
-					snprintf(ftdmchan->last_error, sizeof(ftdmchan->last_error), "invalid value %d range 10-1000", val);
+					ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "invalid value %d range 10-1000", val);
 					GOTO_STATUS(done, FTDM_FAIL);
 				}
 			}
@@ -5108,6 +5108,12 @@ FT_DECLARE(ftdm_status_t) ftdm_configure_span_channels(ftdm_span_t *span, const
 		if (chan_config->dtmf_on_start) {
 			span->channels[chan_index]->dtmfdetect.trigger_on_start = 1;
 		}
+		if (chan_config->dtmf_time_on) {
+			ftdm_channel_command(span->channels[chan_index], FTDM_COMMAND_SET_DTMF_ON_PERIOD, &chan_config->dtmf_time_on);
+		}
+		if (chan_config->dtmf_time_off) {
+			ftdm_channel_command(span->channels[chan_index], FTDM_COMMAND_SET_DTMF_OFF_PERIOD, &chan_config->dtmf_time_off);
+		}
 	}
 
 	return FTDM_SUCCESS;
@@ -5347,6 +5353,14 @@ static ftdm_status_t load_config(void)
 						chan_config.dtmf_on_start = FTDM_FALSE;
 					}
 				}
+			} else if (!strcasecmp(var, "dtmf_time_on")) {
+				if (sscanf(val, "%u", &(chan_config.dtmf_time_on)) != 1) {
+					ftdm_log(FTDM_LOG_ERROR, "invalid dtmf_time_on: '%s'\n", val);
+				}
+			} else if (!strcasecmp(var, "dtmf_time_off")) {
+				if (sscanf(val, "%u", &(chan_config.dtmf_time_off)) != 1) {
+					ftdm_log(FTDM_LOG_ERROR, "invalid dtmf_time_off: '%s'\n", val);
+				}
 			} else if (!strncasecmp(var, "iostats", sizeof("iostats")-1)) {
 				if (ftdm_true(val)) {
 					chan_config.iostats = FTDM_TRUE;
diff --git a/libs/freetdm/src/include/freetdm.h b/libs/freetdm/src/include/freetdm.h
index 2b29d4f396..443afc7fd0 100755
--- a/libs/freetdm/src/include/freetdm.h
+++ b/libs/freetdm/src/include/freetdm.h
@@ -521,6 +521,8 @@ typedef struct ftdm_channel_config {
 	uint8_t debugdtmf;
 	uint8_t dtmf_on_start;
 	uint32_t dtmfdetect_ms;
+	uint32_t dtmf_time_on;
+	uint32_t dtmf_time_off;
 	uint8_t iostats;
 } ftdm_channel_config_t;