diff --git a/MAC/APL/PIC/RSPDriver/src/CDOWrite.cc b/MAC/APL/PIC/RSPDriver/src/CDOWrite.cc
index 06447cfe488e296c85ccff8eb0a5b2df9112c48f..d474fd6b64f569c0852b3504f89a3c2dba5a3550 100644
--- a/MAC/APL/PIC/RSPDriver/src/CDOWrite.cc
+++ b/MAC/APL/PIC/RSPDriver/src/CDOWrite.cc
@@ -149,11 +149,6 @@ uint16 CDOWrite::compute_ip_checksum(void* addr, int count)
 
 void CDOWrite::sendrequest()
 {
-  // write register (with same setting) every second if WRITE_CDO_ONCE == 0
-  if (0 == GET_CONFIG("RSPDriver.WRITE_CDO_ONCE", i)) {
-    Cache::getInstance().getState().cdo().write(getBoardId() * getNumIndices() + getCurrentIndex());
-  }
-
   // skip update if the CDO settings have not been modified
   if (RTC::RegisterState::WRITE != Cache::getInstance().getState().cdo().get(getBoardId() * getNumIndices() + getCurrentIndex()))
   {
diff --git a/MAC/APL/PIC/RSPDriver/src/RSPDriver.conf.in b/MAC/APL/PIC/RSPDriver/src/RSPDriver.conf.in
index d3b69f784d67257067e9411ae59fbbf32f7cc104..c20cb87dddb61589f360819c4bb544961d2c1d55 100644
--- a/MAC/APL/PIC/RSPDriver/src/RSPDriver.conf.in
+++ b/MAC/APL/PIC/RSPDriver/src/RSPDriver.conf.in
@@ -40,8 +40,8 @@ RSPDriver.PPS_TRIGGER=1
 #
 # Specify MAC addresses of the RSP boards explicitly
 #
-RSPDriver.MAC_ADDR_0=10:FA:00:00:00:00
-RSPDriver.MAC_ADDR_1=10:FA:00:00:01:00
+RSPDriver.MAC_ADDR_0=10:FA:00:00:11:00
+RSPDriver.MAC_ADDR_1=10:FA:00:00:12:00
 RSPDriver.MAC_ADDR_2=10:FA:00:00:02:00
 RSPDriver.MAC_ADDR_3=10:FA:00:00:03:00
 RSPDriver.MAC_ADDR_4=10:FA:00:00:04:00
@@ -210,9 +210,6 @@ RSPDriver.LOOPBACK_MODE=0
 RSPDriver.WRITE_RSU=1
 RSPDriver.WRITE_BS=1
 RSPDriver.WRITE_CDO=1
-# WRITE_CDO_ONCE, if set to 1 only write CDO register once at startup
-# otherwise rewrite same data every update (= second)
-RSPDriver.WRITE_CDO_ONCE=1#0
 # READ_CDO, if set to 1 reads back contents of pid=CDO, regid=0x01
 # This can be used to verify that the UDP/IP header is correctly
 # written to the register.