diff --git a/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang b/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang
index 5ae5dbfe3a82068de90f91371c1d4de65a4db464..072c01b897573101f6907a4d6e5ce03c4988c79a 100755
--- a/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang
+++ b/yang-models/_3gpp-nr-nrm-drachoptimizationfunction.yang
@@ -16,6 +16,7 @@ module _3gpp-nr-nrm-drachoptimizationfunction {
     Model (NRM).";
   reference "3GPP TS 28.541 5G Network Resource Model (NRM)";
 
+  revision 2025-03-28 { reference CR-1501; }
   revision 2021-08-04 { reference S5-214052/CR-0517; }
   revision 2021-01-25 { reference CR-0454 ; }
   revision 2020-10-02 { reference "CR-0384, CR-0382" ; }
@@ -49,7 +50,13 @@ 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;
     }