From 44cc438dd7cf7bebfdfc990385dc42b771f62db5 Mon Sep 17 00:00:00 2001
From: sheirerd <sheirerd@ainfosec.com>
Date: Wed, 4 Nov 2026 03:25:18 -0500
Subject: [PATCH] #2529 NXDN conventional repeater calls now consider talkgroup
 zero a valid TO identifier

---
 .../decode/nxdn/identifier/NXDNTalkgroupIdentifier.java    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/io/github/dsheirer/module/decode/nxdn/identifier/NXDNTalkgroupIdentifier.java b/src/main/java/io/github/dsheirer/module/decode/nxdn/identifier/NXDNTalkgroupIdentifier.java
index ad30f2b7..7465e282 100644
--- a/src/main/java/io/github/dsheirer/module/decode/nxdn/identifier/NXDNTalkgroupIdentifier.java
+++ b/src/main/java/io/github/dsheirer/module/decode/nxdn/identifier/NXDNTalkgroupIdentifier.java
@@ -50,6 +50,13 @@ public class NXDNTalkgroupIdentifier extends TalkgroupIdentifier
         return Protocol.NXDN;
     }
 
+    @Override
+    public boolean isValid()
+    {
+        //NXDN conventional repeaters use a value of zero for the TO talkgroup value.
+        return getValue() >= 0;
+    }
+
     /**
      * Indicates if the identifier is for a Type-D system.
      */