diff --git a/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang b/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang
index 55c1b68a2d561b31ce6b0d114cbb7a67a15a9c1d..0e166be1f265cd010ee6b3c7fbea9bf238d1496a 100755
--- a/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang
+++ b/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang
@@ -14,10 +14,11 @@ module _3gpp-nr-nrm-drachoptimizationfunction {
   description "Defines the YANG mapping of the DRACHOptimizationFunction 
     Information Object Class (IOC) that is part of the NR Network Resource 
     Model (NRM).
-    Copyright 2023, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, 
+    Copyright 2025, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, 
     TTA, TTC). All rights reserved.";
   reference "3GPP TS 28.541 5G Network Resource Model (NRM)";
 
+  revision 2025-03-23 { reference CR-1502 ; }
   revision 2023-09-17 { reference CR-1042 ; } 
   revision 2021-08-05 { reference S5-214053/CR-0518; }
   revision 2021-01-25 { reference CR-0454 ; }
@@ -52,7 +53,13 @@ module _3gpp-nr-nrm-drachoptimizationfunction {
       type TargetProbabilityT;
     }
     leaf numberofpreamblessent {
-      description "This attribute determines the number of preambles sent.";
+      description "This attribute indicates the number of preambles sent 
+        used to configure a wanted distribution of RACH preambles in a 
+        vendor implemented DRACH optimisation function.
+        Note: The DRACH optimization function may configure preambleTransMax
+        as defined in TS 38.331 [54]. The allowed values for preambleTransMax
+        are 3, 4, 5, 6, 7, 8, 10, 20, 50, 100, 200 (see 38.331 [54], 
+        subclause 6.3.2).";      
       mandatory true;
       type NumberofpreamblessentT;
     }