diff --git a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band257.tm1.32PRB.usrpx300.conf b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band257.tm1.32PRB.usrpx300.conf
index f2e468c71b..4262b82145 100644
--- a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band257.tm1.32PRB.usrpx300.conf
+++ b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band257.tm1.32PRB.usrpx300.conf
@@ -110,8 +110,8 @@ gNBs =
 #1,2,4,8,10,20,40,80
         ra_ResponseWindow                                           = 7;
 #ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR
-#0=oneeighth,1=onefourth,2=half,3=one,4=two,5=four,6=eight,7=sixteen
-        ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR                = 4;
+#1=oneeighth,2=onefourth,3=half,4=one,5=two,6=four,7=eight,8=sixteen
+        ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR                = 3;
 #oneHalf (0..15) 4,8,12,16,...60,64
         ssb_perRACH_OccasionAndCB_PreamblesPerSSB                   = 7;
 #ra_ContentionResolutionTimer
diff --git a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band261.tm1.32PRB.usrpn300.conf b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band261.tm1.32PRB.usrpn300.conf
index f810dd546c..b412769d9a 100644
--- a/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band261.tm1.32PRB.usrpn300.conf
+++ b/targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band261.tm1.32PRB.usrpn300.conf
@@ -112,8 +112,8 @@ gNBs =
 #1,2,4,8,10,20,40,80
         ra_ResponseWindow                                           = 7;
 #ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR
-#0=oneeighth,1=onefourth,2=half,3=one,4=two,5=four,6=eight,7=sixteen
-        ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR                = 4;
+#1=oneeighth,2=onefourth,3=half,4=one,5=two,6=four,7=eight,8=sixteen
+        ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR                = 3;
 #oneHalf (0..15) 4,8,12,16,...60,64
         ssb_perRACH_OccasionAndCB_PreamblesPerSSB                   = 7;
 #ra_ContentionResolutionTimer