diff --git a/radio/src/pulses/pulses.cpp b/radio/src/pulses/pulses.cpp
index 954c33114..96695aa6f 100755
--- a/radio/src/pulses/pulses.cpp
+++ b/radio/src/pulses/pulses.cpp
@@ -149,7 +149,7 @@ void disablePulses(uint8_t module, uint8_t protocol)
 
 #if defined(CROSSFIRE)
     case PROTOCOL_CHANNELS_CROSSFIRE:
-      disable_module_timer(module);
+      // TODO disable_module_timer(module);
       break;
 #endif
 
@@ -167,10 +167,6 @@ void disablePulses(uint8_t module, uint8_t protocol)
     case PROTOCOL_CHANNELS_PPM:
       disable_ppm(module);
       break;
-
-    default:
-      disable_no_pulses(module);
-      break;
   }
 }
 
@@ -195,7 +191,7 @@ void enablePulses(uint8_t module, uint8_t protocol)
 
 #if defined(CROSSFIRE)
     case PROTOCOL_CHANNELS_CROSSFIRE:
-      init_module_timer(module, CROSSFIRE_PERIOD, true);
+      // TODO init_module_timer(module, CROSSFIRE_PERIOD, true);
       break;
 #endif
 
@@ -216,10 +212,6 @@ void enablePulses(uint8_t module, uint8_t protocol)
     case PROTOCOL_CHANNELS_PPM:
       init_ppm(module);
       break;
-
-    default:
-      init_no_pulses(module);
-      break;
   }
 }
 
diff --git a/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp b/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp
index a4b607191..8bcfa16ef 100755
--- a/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp
@@ -34,11 +34,6 @@ void intmodulePxxStart()
   // shouldn't be used anymore
 }
 
-void intmoduleTimerStart(uint32_t period, uint8_t state)
-{
-  // shouldn't be used anymore
-}
-
 void intmodulePxx2Start()
 {
   INTERNAL_MODULE_ON();
diff --git a/radio/src/targets/taranis/extmodule_driver.cpp b/radio/src/targets/taranis/extmodule_driver.cpp
index 9d27034a2..6e2cfed42 100644
--- a/radio/src/targets/taranis/extmodule_driver.cpp
+++ b/radio/src/targets/taranis/extmodule_driver.cpp
@@ -39,37 +39,6 @@ void extmoduleStop()
   }
 }
 
-void extmoduleTimerStart(uint32_t period, uint8_t state)
-{
-  if (state)
-    EXTERNAL_MODULE_ON();
-  else if (!IS_TRAINER_EXTERNAL_MODULE())
-    EXTERNAL_MODULE_OFF();
-
-  GPIO_PinAFConfig(EXTMODULE_TX_GPIO, EXTMODULE_TX_GPIO_PinSource, 0);
-
-  GPIO_InitTypeDef GPIO_InitStructure;
-  GPIO_InitStructure.GPIO_Pin = EXTMODULE_TX_GPIO_PIN;
-  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
-  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
-  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-  GPIO_Init(EXTMODULE_TX_GPIO, &GPIO_InitStructure);
-  GPIO_SetBits(EXTMODULE_TX_GPIO, EXTMODULE_TX_GPIO_PIN); // Set high
-
-  EXTMODULE_TIMER->CR1 &= ~TIM_CR1_CEN;
-  EXTMODULE_TIMER->PSC = EXTMODULE_TIMER_FREQ / 2000000 - 1; // 0.5uS from 30MHz
-  EXTMODULE_TIMER->ARR = (2000 * period);
-  EXTMODULE_TIMER->CCR2 = (2000 * period) - 1000;
-  EXTMODULE_TIMER->EGR = 1; // Restart
-  EXTMODULE_TIMER->SR &= ~TIM_SR_CC2IF;
-  EXTMODULE_TIMER->DIER |= TIM_DIER_CC2IE; // Enable this interrupt
-  EXTMODULE_TIMER->CR1 |= TIM_CR1_CEN;
-
-  NVIC_EnableIRQ(EXTMODULE_TIMER_CC_IRQn);
-  NVIC_SetPriority(EXTMODULE_TIMER_CC_IRQn, 7);
-}
-
 void extmodulePpmStart()
 {
   EXTERNAL_MODULE_ON();
diff --git a/radio/src/targets/taranis/intmodule_pulses_driver.cpp b/radio/src/targets/taranis/intmodule_pulses_driver.cpp
index e424dd538..6d5bea5ed 100644
--- a/radio/src/targets/taranis/intmodule_pulses_driver.cpp
+++ b/radio/src/targets/taranis/intmodule_pulses_driver.cpp
@@ -32,37 +32,6 @@ void intmoduleStop()
   INTMODULE_TIMER->CR1 &= ~TIM_CR1_CEN;
 }
 
-void intmoduleTimerStart(uint32_t period, uint8_t state)
-{
-  if (state)
-    INTERNAL_MODULE_ON();
-  else
-    INTERNAL_MODULE_OFF();
-
-  GPIO_PinAFConfig(EXTMODULE_TX_GPIO, EXTMODULE_TX_GPIO_PinSource, 0);
-
-  GPIO_InitTypeDef GPIO_InitStructure;
-  GPIO_InitStructure.GPIO_Pin = INTMODULE_TX_GPIO_PIN;
-  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
-  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
-  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-  GPIO_Init(INTMODULE_TX_GPIO, &GPIO_InitStructure);
-  GPIO_SetBits(INTMODULE_TX_GPIO, INTMODULE_TX_GPIO_PIN); // Set high
-
-  INTMODULE_TIMER->CR1 &= ~TIM_CR1_CEN;
-  INTMODULE_TIMER->PSC = EXTMODULE_TIMER_FREQ / 2000000 - 1; // 0.5uS from 30MHz
-  INTMODULE_TIMER->ARR = (2000 * period);
-  INTMODULE_TIMER->CCR2 = (2000 * period) - 1000;
-  INTMODULE_TIMER->EGR = 1; // Restart
-  INTMODULE_TIMER->SR &= ~TIM_SR_CC2IF; // Clear flag
-  INTMODULE_TIMER->DIER |= TIM_DIER_CC2IE; // Enable this interrupt
-  INTMODULE_TIMER->CR1 |= TIM_CR1_CEN;
-
-  NVIC_EnableIRQ(INTMODULE_TIMER_CC_IRQn);
-  NVIC_SetPriority(INTMODULE_TIMER_CC_IRQn, 7);
-}
-
 void intmoduleSendNextFrame()
 {
   if (moduleSettings[INTERNAL_MODULE].protocol == PROTOCOL_CHANNELS_PXX) {
@@ -122,7 +91,7 @@ void intmodulePxxStart()
   INTMODULE_TIMER->DIER |= TIM_DIER_UDE; // Enable DMA on update
   INTMODULE_TIMER->CCMR2 = TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2;
   INTMODULE_TIMER->SR &= ~TIM_SR_CC2IF; // Clear flag
-  INTMODULE_TIMER->CCR2 = 40000; // The first frame will be sent in 20ms
+  INTMODULE_TIMER->CCR2 = 16000; // The first frame will be sent in 20ms
   INTMODULE_TIMER->DIER |= TIM_DIER_CC2IE; // Enable this interrupt
   INTMODULE_TIMER->CR1 |= TIM_CR1_CEN;
 
diff --git a/radio/src/targets/taranis/pulses_driver.cpp b/radio/src/targets/taranis/pulses_driver.cpp
index 6e5070222..7b883d2ad 100644
--- a/radio/src/targets/taranis/pulses_driver.cpp
+++ b/radio/src/targets/taranis/pulses_driver.cpp
@@ -106,32 +106,3 @@ void disable_ppm(uint8_t module)
   }
 #endif
 }
-
-void init_no_pulses(uint8_t module)
-{
-  init_module_timer(module, 18, false);
-}
-
-void disable_no_pulses(uint8_t module)
-{
-  if (module == INTERNAL_MODULE)
-    intmoduleStop();
-  else
-    extmoduleStop();
-}
-
-void init_module_timer(uint8_t module, uint32_t period, uint8_t state)
-{
-  if (module == INTERNAL_MODULE)
-    intmoduleTimerStart(period, state);
-  else
-    extmoduleTimerStart(period, state);
-}
-
-void disable_module_timer(uint8_t module)
-{
-  if (module == INTERNAL_MODULE)
-    intmoduleStop();
-  else
-    extmoduleStop();
-}
diff --git a/radio/src/tasks.cpp b/radio/src/tasks.cpp
index 8ccae5eb1..665c3600e 100644
--- a/radio/src/tasks.cpp
+++ b/radio/src/tasks.cpp
@@ -75,7 +75,7 @@ bool isForcePowerOffRequested()
 
 bool isProtocolSynchronous(uint8_t protocol)
 {
-  return (protocol == PROTOCOL_CHANNELS_PXX2 || protocol == PROTOCOL_CHANNELS_NONE);
+  return (protocol == PROTOCOL_CHANNELS_PXX2 || protocol == PROTOCOL_CHANNELS_CROSSFIRE || protocol == PROTOCOL_CHANNELS_NONE);
 }
 
 void sendSynchronousPulses()
@@ -83,7 +83,12 @@ void sendSynchronousPulses()
   for (uint8_t module = 0; module < NUM_MODULES; module++) {
     uint8_t protocol = moduleSettings[module].protocol;
     if (isProtocolSynchronous(protocol) && setupPulses(module)) {
-      intmoduleSendNextFrame();
+      if (module == INTERNAL_MODULE) {
+        intmoduleSendNextFrame();
+      }
+      else {
+        // TODO
+      }
     }
   }
 }