diff --git a/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java b/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java
index c44bb4cd..d24a223e 100644
--- a/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java
+++ b/src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java
@@ -75,6 +75,7 @@ import io.github.dsheirer.module.decode.dmr.message.voice.VoiceMessage;
 import io.github.dsheirer.module.decode.event.DecodeEvent;
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 import io.github.dsheirer.module.decode.event.PlottableDecodeEvent;
+import io.github.dsheirer.module.decode.ip.hytera.sds.HyteraUnknownPacket;
 import io.github.dsheirer.module.decode.ip.hytera.sms.HyteraSmsPacket;
 import io.github.dsheirer.protocol.Protocol;
 import io.github.dsheirer.source.tuner.channel.rotation.AddChannelRotationActiveStateRequest;
@@ -318,6 +319,19 @@ public class DMRDecoderState extends TimeslotDecoderState
                     .build();
             broadcast(smsEvent);
         }
+        //Unknown Hytera Long Data Service Token Message
+        else if(packet.getPacket() instanceof HyteraUnknownPacket hyteraUnknownPacket)
+        {
+            MutableIdentifierCollection mic = new MutableIdentifierCollection(packet.getIdentifiers());
+
+            DecodeEvent unknownTokenEvent = DMRDecodeEvent.builder(packet.getTimestamp())
+                    .eventDescription(DecodeEventType.UNKNOWN_PACKET.name())
+                    .identifiers(mic)
+                    .timeslot(packet.getTimeslot())
+                    .details("HYTERA UNK TOKEN MSG:" + hyteraUnknownPacket.getHeader().toString())
+                    .build();
+            broadcast(unknownTokenEvent);
+        }
         else
         {
             DecodeEvent packetEvent = DMRDecodeEvent.builder(packet.getTimestamp())
diff --git a/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/packet/PacketSequenceMessageFactory.java b/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/packet/PacketSequenceMessageFactory.java
index 5b2a3e4c..667661f7 100644
--- a/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/packet/PacketSequenceMessageFactory.java
+++ b/src/main/java/io/github/dsheirer/module/decode/dmr/message/data/packet/PacketSequenceMessageFactory.java
@@ -32,6 +32,7 @@ import io.github.dsheirer.module.decode.dmr.message.data.header.motorola.MNISPro
 import io.github.dsheirer.module.decode.dmr.message.type.ApplicationType;
 import io.github.dsheirer.module.decode.ip.UnknownPacket;
 import io.github.dsheirer.module.decode.ip.hytera.sds.HyteraTokenHeader;
+import io.github.dsheirer.module.decode.ip.hytera.sds.HyteraUnknownPacket;
 import io.github.dsheirer.module.decode.ip.hytera.sms.HyteraSmsPacket;
 import io.github.dsheirer.module.decode.ip.ipv4.IPV4Header;
 import io.github.dsheirer.module.decode.ip.ipv4.IPV4Packet;
@@ -175,7 +176,7 @@ public class PacketSequenceMessageFactory
             }
             else
             {
-                return new DMRPacketMessage(packetSequence, new UnknownPacket(packet, 0), packet,
+                return new DMRPacketMessage(packetSequence, new HyteraUnknownPacket(hyteraTokenHeader), packet,
                         packetSequence.getTimeslot(), packetSequence.getPacketSequenceHeader().getTimestamp());
             }
         }
diff --git a/src/main/java/io/github/dsheirer/module/decode/ip/hytera/sds/HyteraUnknownPacket.java b/src/main/java/io/github/dsheirer/module/decode/ip/hytera/sds/HyteraUnknownPacket.java
new file mode 100644
index 00000000..ec2e74a8
--- /dev/null
+++ b/src/main/java/io/github/dsheirer/module/decode/ip/hytera/sds/HyteraUnknownPacket.java
@@ -0,0 +1,68 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.module.decode.ip.hytera.sds;
+
+import io.github.dsheirer.identifier.Identifier;
+import io.github.dsheirer.module.decode.ip.IPacket;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Hytera SDS Long Data Message with unknown encoded payload
+ */
+public class HyteraUnknownPacket implements IPacket
+{
+    private HyteraTokenHeader mHeader;
+
+    /**
+     * Constructs a parser for a header contained within a binary message starting at the offset.
+     *
+     * @param header to the packet within the message
+     */
+    public HyteraUnknownPacket(HyteraTokenHeader header)
+    {
+        mHeader = header;
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append("HYTERA UNKNOWN LONG DATA SERVICE TOKEN MESSAGE:").append(getHeader().toString());
+        return sb.toString();
+    }
+
+    @Override
+    public HyteraTokenHeader getHeader()
+    {
+        return mHeader;
+    }
+
+    @Override
+    public IPacket getPayload() {return null;}
+    @Override
+    public boolean hasPayload() {return false;}
+
+    @Override
+    public List<Identifier> getIdentifiers()
+    {
+        return Collections.emptyList();
+    }
+}