diff --git a/internal/module/sip-call-server.go b/internal/module/sip-call-server.go
index 069a7e3..90e1f74 100644
--- a/internal/module/sip-call-server.go
+++ b/internal/module/sip-call-server.go
@@ -191,7 +191,6 @@ func (scs *SIPCallServer) Output(ctx context.Context, payload any) error {
 
 	if ok {
 		dtmfWriter := call.inDialog.AudioWriterDTMF()
-
 		time.Sleep(time.Millisecond * time.Duration(payloadDTMFResponse.PreWait))
 		for i, dtmfRune := range payloadDTMFResponse.Digits {
 			err := dtmfWriter.WriteDTMF(dtmfRune)
@@ -200,7 +199,7 @@ func (scs *SIPCallServer) Output(ctx context.Context, payload any) error {
 				return fmt.Errorf("sip.dtmf.server error output dtmf digit at index %d", i)
 			}
 		}
-		time.Sleep(time.Millisecond * time.Duration(payloadDTMFResponse.PreWait))
+		time.Sleep(time.Millisecond * time.Duration(payloadDTMFResponse.PostWait))
 		return nil
 	}
 
diff --git a/internal/module/sip-dtmf-server.go b/internal/module/sip-dtmf-server.go
index 575122a..41ddc72 100644
--- a/internal/module/sip-dtmf-server.go
+++ b/internal/module/sip-dtmf-server.go
@@ -214,7 +214,7 @@ func (sds *SIPDTMFServer) Output(ctx context.Context, payload any) error {
 				return fmt.Errorf("sip.dtmf.server error output dtmf digit at index %d", i)
 			}
 		}
-		time.Sleep(time.Millisecond * time.Duration(payloadDTMFResponse.PreWait))
+		time.Sleep(time.Millisecond * time.Duration(payloadDTMFResponse.PostWait))
 		return nil
 	}