1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java b/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java
index 10cf1bee3..fbac5abaf 100644
--- a/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java
@@ -624,7 +624,7 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
             }
         }
 
-        if (channel != null) {
+        if (channel != null && codec != CODEC_12 && codec != CODEC_13 ) {
             if (connectionless) {
                 ByteBuf response = Unpooled.buffer();
                 response.writeShort(5);