diff --git a/core/ivr/ivr.go b/core/ivr/ivr.go
index 8253f3ce9..79202ec5d 100644
--- a/core/ivr/ivr.go
+++ b/core/ivr/ivr.go
@@ -66,7 +66,7 @@ func GetClient(channel *models.Channel) (Client, error) {
 
 // Client defines the interface IVR clients must satisfy
 type Client interface {
-	RequestCall(number urns.URN, handleURL string, statusURL string) (CallID, *httpx.Trace, error)
+	RequestCall(number urns.URN, handleURL string, statusURL string, machineDetection bool) (CallID, *httpx.Trace, error)
 
 	HangupCall(externalID string) (*httpx.Trace, error)
 
@@ -250,7 +250,7 @@ func RequestCallStartForConnection(ctx context.Context, config *config.Config, d
 	}
 
 	// try to request our call start
-	callID, trace, err := c.RequestCall(telURN, resumeURL, statusURL)
+	callID, trace, err := c.RequestCall(telURN, resumeURL, statusURL, channel.MachineDetection())
 
 	/// insert an channel log if we have an HTTP trace
 	if trace != nil {
diff --git a/core/ivr/twiml/twiml.go b/core/ivr/twiml/twiml.go
index 3bdc2c707..a54b51479 100644
--- a/core/ivr/twiml/twiml.go
+++ b/core/ivr/twiml/twiml.go
@@ -182,15 +182,18 @@ type CallResponse struct {
 }
 
 // RequestCall causes this client to request a new outgoing call for this provider
-func (c *client) RequestCall(number urns.URN, callbackURL string, statusURL string) (ivr.CallID, *httpx.Trace, error) {
+func (c *client) RequestCall(number urns.URN, callbackURL string, statusURL string, machineDetection bool) (ivr.CallID, *httpx.Trace, error) {
 	form := url.Values{}
 	form.Set("To", number.Path())
 	form.Set("From", c.channel.Address())
 	form.Set("Url", callbackURL)
 	form.Set("StatusCallback", statusURL)
-	form.Set("MachineDetection", "Enable")
-	form.Set("AsyncAmd", "true")
-	form.Set("AsyncAmdStatusCallback", statusURL)
+
+	if machineDetection {
+		form.Set("MachineDetection", "Enable")
+		form.Set("AsyncAmd", "true")
+		form.Set("AsyncAmdStatusCallback", statusURL)
+	}
 
 	sendURL := c.baseURL + strings.Replace(callPath, "{AccountSID}", c.accountSID, -1)
 
diff --git a/core/ivr/vonage/vonage.go b/core/ivr/vonage/vonage.go
index a05b628dd..80783b55a 100644
--- a/core/ivr/vonage/vonage.go
+++ b/core/ivr/vonage/vonage.go
@@ -404,15 +404,17 @@ type CallResponse struct {
 }
 
 // RequestCall causes this client to request a new outgoing call for this provider
-func (c *client) RequestCall(number urns.URN, resumeURL string, statusURL string) (ivr.CallID, *httpx.Trace, error) {
+func (c *client) RequestCall(number urns.URN, resumeURL string, statusURL string, machineDetection bool) (ivr.CallID, *httpx.Trace, error) {
 	callR := &CallRequest{
 		AnswerURL:    []string{resumeURL + "&sig=" + url.QueryEscape(c.calculateSignature(resumeURL))},
 		AnswerMethod: http.MethodPost,
 
 		EventURL:    []string{statusURL + "?sig=" + url.QueryEscape(c.calculateSignature(statusURL))},
 		EventMethod: http.MethodPost,
+	}
 
-		MachineDetection: "hangup", // if an answering machine answers, just hangup
+	if machineDetection {
+		callR.MachineDetection = "hangup" // if an answering machine answers, just hangup
 	}
 
 	callR.To = append(callR.To, Phone{Type: "phone", Number: strings.TrimLeft(number.Path(), "+")})
diff --git a/core/models/channels.go b/core/models/channels.go
index 432875f32..16ede2f29 100644
--- a/core/models/channels.go
+++ b/core/models/channels.go
@@ -54,6 +54,7 @@ type Channel struct {
 		Roles              []assets.ChannelRole     `json:"roles"`
 		MatchPrefixes      []string                 `json:"match_prefixes"`
 		AllowInternational bool                     `json:"allow_international"`
+		MachineDetection   bool                     `json:"machine_detection"`
 		Config             map[string]interface{}   `json:"config"`
 	}
 }
@@ -91,6 +92,9 @@ func (c *Channel) MatchPrefixes() []string { return c.c.MatchPrefixes }
 // AllowInternational returns whether this channel allows sending internationally (only applies to TEL schemes)
 func (c *Channel) AllowInternational() bool { return c.c.AllowInternational }
 
+// MachineDetection returns whether this channel should do answering machine detection (only applies to IVR)
+func (c *Channel) MachineDetection() bool { return c.c.MachineDetection }
+
 // Parent returns a reference to the parent channel of this channel (if any)
 func (c *Channel) Parent() *assets.ChannelReference { return c.c.Parent }
 
@@ -169,7 +173,8 @@ SELECT ROW_TO_JSON(r) FROM (SELECT
 		FROM unnest(regexp_split_to_array(c.role,'')) as r)
 	) as roles,
 	JSON_EXTRACT_PATH(c.config::json, 'matching_prefixes') as match_prefixes,
-	JSON_EXTRACT_PATH(c.config::json, 'allow_international') as allow_international
+	JSON_EXTRACT_PATH(c.config::json, 'allow_international') as allow_international,
+	JSON_EXTRACT_PATH(c.config::json, 'machine_detection') as machine_detection
 FROM 
 	channels_channel c
 WHERE 
diff --git a/core/tasks/ivr/worker_test.go b/core/tasks/ivr/worker_test.go
index 05671071e..c0958db76 100644
--- a/core/tasks/ivr/worker_test.go
+++ b/core/tasks/ivr/worker_test.go
@@ -78,7 +78,7 @@ type MockClient struct {
 	callError error
 }
 
-func (c *MockClient) RequestCall(number urns.URN, handleURL string, statusURL string) (ivr.CallID, *httpx.Trace, error) {
+func (c *MockClient) RequestCall(number urns.URN, handleURL string, statusURL string, machineDetection bool) (ivr.CallID, *httpx.Trace, error) {
 	return c.callID, nil, c.callError
 }
 
diff --git a/web/ivr/ivr_test.go b/web/ivr/ivr_test.go
index 04117c9d7..2ef31f101 100644
--- a/web/ivr/ivr_test.go
+++ b/web/ivr/ivr_test.go
@@ -78,7 +78,7 @@ func TestTwilioIVR(t *testing.T) {
 	defer server.Stop()
 
 	// add auth tokens
-	db.MustExec(`UPDATE channels_channel SET config = '{"auth_token": "token", "account_sid": "sid", "callback_domain": "localhost:8090"}' WHERE id = $1`, testdata.TwilioChannel.ID)
+	db.MustExec(`UPDATE channels_channel SET config = '{"auth_token": "token", "account_sid": "sid", "callback_domain": "localhost:8090", "machine_detection": true}' WHERE id = $1`, testdata.TwilioChannel.ID)
 
 	// create a flow start for cathy bob, and george
 	parentSummary := json.RawMessage(`{