diff --git a/radio/src/pulses/pulses.cpp b/radio/src/pulses/pulses.cpp
index 8c9d745b4..581836797 100755
--- a/radio/src/pulses/pulses.cpp
+++ b/radio/src/pulses/pulses.cpp
@@ -204,7 +204,7 @@ void enablePulses(uint8_t module, uint8_t protocol)
     case PROTOCOL_CHANNELS_DSM2_LP45:
     case PROTOCOL_CHANNELS_DSM2_DSM2:
     case PROTOCOL_CHANNELS_DSM2_DSMX:
-      init_serial(module, DSM2_BAUDRATE, DSM2_PERIOD * 2000, false);
+      extmoduleSerialStart(DSM2_BAUDRATE, DSM2_PERIOD * 2000, false);
       break;
 #endif
 
@@ -222,12 +222,12 @@ void enablePulses(uint8_t module, uint8_t protocol)
 
 #if defined(MULTIMODULE)
     case PROTOCOL_CHANNELS_MULTIMODULE:
-      init_serial(module, MULTIMODULE_BAUDRATE, MULTIMODULE_PERIOD * 2000, true);
+      extmoduleSerialStart(MULTIMODULE_BAUDRATE, MULTIMODULE_PERIOD * 2000, true);
       break;
 #endif
 
     case PROTOCOL_CHANNELS_SBUS:
-      init_serial(module, SBUS_BAUDRATE, SBUS_PERIOD_HALF_US, false);
+      extmoduleSerialStart(SBUS_BAUDRATE, SBUS_PERIOD_HALF_US, false);
       break;
 
     case PROTOCOL_CHANNELS_PPM:
diff --git a/radio/src/targets/horus/board.h b/radio/src/targets/horus/board.h
index deb44d3de..5bb628cd5 100644
--- a/radio/src/targets/horus/board.h
+++ b/radio/src/targets/horus/board.h
@@ -225,7 +225,6 @@ void init_pxx1_pulses(uint8_t module);
 void disable_pxx1_pulses(uint8_t module);
 void init_pxx2(uint8_t module);
 void disable_pxx2(uint8_t module);
-void init_serial(uint8_t module, uint32_t baudrate, uint32_t period_half_us, bool inverted);
 void intmoduleSerialStart(uint32_t baudrate, uint8_t rxEnable);
 void disable_serial(uint8_t module);
 void intmoduleStop();
diff --git a/radio/src/targets/horus/pulses_driver.cpp b/radio/src/targets/horus/pulses_driver.cpp
index 796bcf177..559daed76 100644
--- a/radio/src/targets/horus/pulses_driver.cpp
+++ b/radio/src/targets/horus/pulses_driver.cpp
@@ -78,13 +78,6 @@ void disable_pxx1_pulses(uint8_t module)
 }
 
 #if defined(DSM2)
-void init_serial(uint8_t module, uint32_t baudrate, uint32_t period_half_us, bool inverted)
-{
-  if (module == EXTERNAL_MODULE) {
-    extmoduleSerialStart(baudrate, period_half_us, inverted);
-  }
-}
-
 void disable_serial(uint8_t module)
 {
   if (module == EXTERNAL_MODULE) {
diff --git a/radio/src/targets/sky9x/board.h b/radio/src/targets/sky9x/board.h
index ff64e7ac6..84387d514 100644
--- a/radio/src/targets/sky9x/board.h
+++ b/radio/src/targets/sky9x/board.h
@@ -259,7 +259,6 @@ void init_ppm(uint32_t port);
 void disable_ppm(uint32_t port);
 void init_pxx1_pulses(uint32_t port);
 void disable_pxx1_pulses(uint32_t port);
-void init_serial(uint32_t port, uint32_t baudrate, uint32_t period_half_us, bool inverted);
 void disable_serial(uint32_t port);
 void init_module_timer( uint32_t module_index, uint32_t period, uint8_t state);
 void disable_module_timer( uint32_t module_index);
diff --git a/radio/src/targets/sky9x/pulses_driver.cpp b/radio/src/targets/sky9x/pulses_driver.cpp
index 603016075..8ca8169b6 100644
--- a/radio/src/targets/sky9x/pulses_driver.cpp
+++ b/radio/src/targets/sky9x/pulses_driver.cpp
@@ -236,21 +236,16 @@ void disable_pxx1_pulses(uint32_t port)
   }
 }
 
-void init_serial(uint32_t port, uint32_t baudrate, uint32_t period_half_us, bool inverted)
+void extmoduleSerialStart(uint32_t baudrate, uint32_t period_half_us, bool inverted)
 {
-  if (port == EXTERNAL_MODULE) {
-    if (baudrate == 125000) {
-      // TODO init_main_ppm could take the period as parameter?
-      init_main_ppm(2500 * 2, 0);
-      init_ssc(125);
-    }
-    else {
-      init_main_ppm(3500 * 2, 0);
-      init_ssc(100);
-    }
-    }
+  if (baudrate == 125000) {
+    // TODO init_main_ppm could take the period as parameter?
+    init_main_ppm(2500 * 2, 0);
+    init_ssc(125);
+  }
   else {
-    // TODO
+    init_main_ppm(3500 * 2, 0);
+    init_ssc(100);
   }
 }
 
diff --git a/radio/src/targets/taranis/board.h b/radio/src/targets/taranis/board.h
index d8a98008b..7e043da80 100644
--- a/radio/src/targets/taranis/board.h
+++ b/radio/src/targets/taranis/board.h
@@ -189,7 +189,6 @@ void init_pxx1_pulses(uint8_t module);
 void init_pxx1_serial(uint8_t module);
 void disable_pxx1_pulses(uint8_t module);
 void disable_pxx1_serial(uint8_t module);
-void init_serial(uint8_t module, uint32_t baudrate, uint32_t period, bool inverted);
 void disable_serial(uint8_t module);
 void intmoduleStop();
 void intmodulePxxStart();
diff --git a/radio/src/targets/taranis/pulses_driver.cpp b/radio/src/targets/taranis/pulses_driver.cpp
index ed8dd01a9..1e67152ae 100644
--- a/radio/src/targets/taranis/pulses_driver.cpp
+++ b/radio/src/targets/taranis/pulses_driver.cpp
@@ -73,13 +73,6 @@ void disable_pxx2(uint8_t module)
 }
 
 #if defined(DSM2)
-void init_serial(uint8_t module, uint32_t baudrate, uint32_t period_half_us, bool inverted)
-{
-  if (module == EXTERNAL_MODULE) {
-    extmoduleSerialStart(baudrate, period_half_us, inverted);
-  }
-}
-
 void disable_serial(uint8_t module)
 {
   if (module == EXTERNAL_MODULE) {