diff --git a/meshtastic/admin.options b/meshtastic/admin.options
index 1495a50..a2131f9 100644
--- a/meshtastic/admin.options
+++ b/meshtastic/admin.options
@@ -5,3 +5,6 @@
 
 *AdminMessage.set_ringtone_message max_size:231
 *AdminMessage.get_ringtone_response max_size:231
+
+
+*HamParameters.call_sign max_size:6
\ No newline at end of file
diff --git a/meshtastic/admin.proto b/meshtastic/admin.proto
index 16ae1d0..9282f1f 100644
--- a/meshtastic/admin.proto
+++ b/meshtastic/admin.proto
@@ -201,6 +201,11 @@ message AdminMessage {
      */
     DeviceConnectionStatus get_device_connection_status_response = 17;
 
+    /*
+     * Setup a node for licensed amateur (ham) radio operation
+     */
+    HamParameters set_ham_mode = 18;
+
     /*
      * Set the owner for this node
      */
@@ -279,3 +284,24 @@ message AdminMessage {
     int32 nodedb_reset = 100;
   }
 }
+
+/*
+ * Parameters for setting up Meshtastic for ameteur radio usage
+ */
+message HamParameters {
+  /*
+   * Amateur radio call sign, eg. KD2ABC
+   */
+  string call_sign = 1;
+
+  /*
+   * Transmit power in dBm at the LoRA transceiver, not including any amplification
+   */
+  int32 tx_power = 2;
+
+  /*
+   * The selected frequency of LoRA operation
+   * Please respect your local laws, regulations, and band plans.
+   */
+  float frequency = 3;
+}