diff --git a/device/arista/x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm b/device/arista/x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm
index 61026aad52..f6f1774d8e 100644
--- a/device/arista/x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm
+++ b/device/arista/x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm
@@ -362,6 +362,55 @@ ucode_port_46=CGE2_25:core_1.46
 ucode_port_47=CGE2_26:core_1.47
 ucode_port_48=CGE2_24:core_1.48
 
+serdes_tx_taps_1=pam4:-18:86:0:4:0:0
+serdes_tx_taps_2=pam4:-18:86:0:4:0:0
+serdes_tx_taps_3=pam4:-18:86:0:4:0:0
+serdes_tx_taps_4=pam4:-18:86:0:4:0:0
+serdes_tx_taps_5=pam4:-18:86:0:4:0:0
+serdes_tx_taps_6=pam4:-18:86:0:4:0:0
+serdes_tx_taps_7=pam4:-18:86:0:4:0:0
+serdes_tx_taps_8=pam4:-18:86:0:4:0:0
+serdes_tx_taps_9=pam4:-18:86:0:4:0:0
+serdes_tx_taps_10=pam4:-18:86:0:4:0:0
+serdes_tx_taps_11=pam4:-18:86:0:4:0:0
+serdes_tx_taps_12=pam4:-18:86:0:4:0:0
+serdes_tx_taps_13=pam4:-18:86:0:4:0:0
+serdes_tx_taps_14=pam4:-18:86:0:4:0:0
+serdes_tx_taps_15=pam4:-18:86:0:4:0:0
+serdes_tx_taps_16=pam4:-18:86:0:4:0:0
+serdes_tx_taps_17=pam4:-18:86:0:4:0:0
+serdes_tx_taps_18=pam4:-18:86:0:4:0:0
+serdes_tx_taps_19=pam4:-18:86:0:4:0:0
+serdes_tx_taps_20=pam4:-18:86:0:4:0:0
+serdes_tx_taps_21=pam4:-18:86:0:4:0:0
+serdes_tx_taps_22=pam4:-18:86:0:4:0:0
+serdes_tx_taps_23=pam4:-18:86:0:4:0:0
+serdes_tx_taps_24=pam4:-18:86:0:4:0:0
+serdes_tx_taps_25=pam4:-18:86:0:4:0:0
+serdes_tx_taps_26=pam4:-18:86:0:4:0:0
+serdes_tx_taps_27=pam4:-18:86:0:4:0:0
+serdes_tx_taps_28=pam4:-18:86:0:4:0:0
+serdes_tx_taps_29=pam4:-18:86:0:4:0:0
+serdes_tx_taps_30=pam4:-18:86:0:4:0:0
+serdes_tx_taps_31=pam4:-18:86:0:4:0:0
+serdes_tx_taps_32=pam4:-18:86:0:4:0:0
+serdes_tx_taps_33=pam4:-18:86:0:4:0:0
+serdes_tx_taps_34=pam4:-18:86:0:4:0:0
+serdes_tx_taps_35=pam4:-18:86:0:4:0:0
+serdes_tx_taps_36=pam4:-18:86:0:4:0:0
+serdes_tx_taps_37=pam4:-18:86:0:4:0:0
+serdes_tx_taps_38=pam4:-18:86:0:4:0:0
+serdes_tx_taps_39=pam4:-18:86:0:4:0:0
+serdes_tx_taps_40=pam4:-18:86:0:4:0:0
+serdes_tx_taps_41=pam4:-18:86:0:4:0:0
+serdes_tx_taps_42=pam4:-18:86:0:4:0:0
+serdes_tx_taps_43=pam4:-18:86:0:4:0:0
+serdes_tx_taps_44=pam4:-18:86:0:4:0:0
+serdes_tx_taps_45=pam4:-18:86:0:4:0:0
+serdes_tx_taps_46=pam4:-18:86:0:4:0:0
+serdes_tx_taps_47=pam4:-18:86:0:4:0:0
+serdes_tx_taps_48=pam4:-18:86:0:4:0:0
+
 ucode_port_0.BCM8869X=CPU.0:core_0.0
 ucode_port_200.BCM8869X=CPU.8:core_1.200
 ucode_port_201.BCM8869X=CPU.16:core_0.201
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml
index 95e20b9178..044ef034a5 100644
--- a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml
@@ -4,11 +4,6 @@
     <phy_addr>0</phy_addr>
     <mode>gearbox</mode>
     <topology>2</topology>
-    <tx-taps>
-        <PAM4>2,-8,17,0,0</PAM4>
-        <NRZ>0,-8,17,0,0</NRZ>
-    </tx-taps>
-    <tx-taps-scale>0,0,1,0,0</tx-taps-scale>
 
     <lane id="0" system-side="true" />
     <lane id="1" system-side="true" />
@@ -34,4 +29,33 @@
     <lane id="21" system-side="false"  />
     <lane id="22" system-side="false"  />
     <lane id="23" system-side="false"  />
+
+    <PAM4>
+        <lane id="0" tx-taps="1,-5,15,0,0"/>
+        <lane id="1" tx-taps="1,-5,15,0,0"/>
+        <lane id="2" tx-taps="1,-5,15,0,0"/>
+        <lane id="3" tx-taps="1,-5,15,0,0"/>
+        <lane id="4" tx-taps="1,-5,15,0,0"/>
+        <lane id="5" tx-taps="1,-5,15,0,0"/>
+        <lane id="6" tx-taps="1,-5,15,0,0"/>
+        <lane id="7" tx-taps="1,-5,15,0,0"/>
+    </PAM4>
+    <NRZ>
+        <lane id="8" tx-taps="0,-1,15,-6,0"/>
+        <lane id="9" tx-taps="0,-1,15,-6,0"/>
+        <lane id="10" tx-taps="0,-1,15,-6,0"/>
+        <lane id="11" tx-taps="0,-1,15,-6,0"/>
+        <lane id="12" tx-taps="0,-1,15,-6,0"/>
+        <lane id="13" tx-taps="0,-1,15,-6,0"/>
+        <lane id="14" tx-taps="0,-1,15,-6,0"/>
+        <lane id="15" tx-taps="0,-1,15,-6,0"/>
+        <lane id="16" tx-taps="0,-1,15,-6,0"/>
+        <lane id="17" tx-taps="0,-1,15,-6,0"/>
+        <lane id="18" tx-taps="0,-1,15,-6,0"/>
+        <lane id="19" tx-taps="0,-1,15,-6,0"/>
+        <lane id="20" tx-taps="0,-1,15,-6,0"/>
+        <lane id="21" tx-taps="0,-1,15,-6,0"/>
+        <lane id="22" tx-taps="0,-1,15,-6,0"/>
+        <lane id="23" tx-taps="0,-1,15,-6,0"/>
+    </NRZ>
 </root>