diff --git a/ADF7021.cpp b/ADF7021.cpp
index 5466da1..e09114b 100644
--- a/ADF7021.cpp
+++ b/ADF7021.cpp
@@ -187,9 +187,19 @@ void CIO::ifConf(MMDVM_STATE modemState, bool reset)
   uint32_t ADF7021_REG13 = 0U;
   int32_t AFC_OFFSET = 0;
 
-  if(modemState != STATE_CWID && modemState != STATE_POCSAG)
+  uint32_t frequency_tx_tmp, frequency_rx_tmp;
+
+  if (modemState != STATE_CWID && modemState != STATE_POCSAG)
     m_modemState_prev = modemState;
 
+  // Change frequency for POCSAG mode, store a backup of DV frequencies
+  if (modemState == STATE_POCSAG) {
+    frequency_tx_tmp = m_frequency_tx;
+    frequency_rx_tmp = m_frequency_rx;
+    m_frequency_tx   = m_pocsag_freq_tx;
+    m_frequency_rx   = m_pocsag_freq_tx;
+  }
+
   // Toggle CE pin for ADF7021 reset
   if(reset) {
     CE_pin(LOW);
@@ -545,7 +555,13 @@ void CIO::ifConf(MMDVM_STATE modemState, bool reset)
   AD7021_control_word = 0x000E000F;
 #endif
   Send_AD7021_control();
-  
+
+  // Restore normal DV frequencies
+  if (modemState == STATE_POCSAG) {
+    m_frequency_tx = frequency_tx_tmp;
+    m_frequency_rx = frequency_rx_tmp;
+  }
+
 #if defined(DUPLEX)
 if(m_duplex && (modemState != STATE_CWID && modemState != STATE_POCSAG))
   ifConf2(modemState);
diff --git a/IO.cpp b/IO.cpp
index 8c33119..d2d041f 100644
--- a/IO.cpp
+++ b/IO.cpp
@@ -24,6 +24,7 @@
 
 uint32_t    m_frequency_rx;
 uint32_t    m_frequency_tx;
+uint32_t    m_pocsag_freq_tx;
 uint8_t     m_power;
 
 CIO::CIO():
@@ -288,7 +289,7 @@ bool CIO::hasRXOverflow()
   return m_rxBuffer.hasOverflowed();
 }
 
-uint8_t CIO::setFreq(uint32_t frequency_rx, uint32_t frequency_tx, uint8_t rf_power)
+uint8_t CIO::setFreq(uint32_t frequency_rx, uint32_t frequency_tx, uint8_t rf_power, uint32_t pocsag_freq_tx)
 {
   // Configure power level
   setPower(rf_power);
@@ -300,9 +301,16 @@ uint8_t CIO::setFreq(uint32_t frequency_rx, uint32_t frequency_tx, uint8_t rf_po
   ((frequency_rx >= UHF2_MIN)&&(frequency_rx < UHF2_MAX)) || ((frequency_tx >= UHF2_MIN)&&(frequency_tx < UHF2_MAX)) ) )
     return 4U;
 
+  if( !( ((pocsag_freq_tx >= VHF1_MIN)&&(pocsag_freq_tx < VHF1_MAX)) || \
+  ((pocsag_freq_tx >= UHF1_MIN)&&(pocsag_freq_tx < UHF1_MAX)) || \
+  ((pocsag_freq_tx >= VHF2_MIN)&&(pocsag_freq_tx < VHF2_MAX)) || \
+  ((pocsag_freq_tx >= UHF2_MIN)&&(pocsag_freq_tx < UHF2_MAX)) ) )
+    return 4U;
+
   // Configure frequency
   m_frequency_rx = frequency_rx;
   m_frequency_tx = frequency_tx;
+  m_pocsag_freq_tx = pocsag_freq_tx;
 
   return 0U;
 }
diff --git a/IO.h b/IO.h
index 8e2c705..5fe4081 100644
--- a/IO.h
+++ b/IO.h
@@ -42,6 +42,7 @@
 
 extern uint32_t  m_frequency_rx;
 extern uint32_t  m_frequency_tx;
+extern uint32_t  m_pocsag_freq_tx;
 extern uint8_t   m_power;
 
 class CIO {
@@ -93,7 +94,7 @@ class CIO {
   void      process(void);
   bool      hasTXOverflow(void);
   bool      hasRXOverflow(void);
-  uint8_t   setFreq(uint32_t frequency_rx, uint32_t frequency_tx, uint8_t rf_power);
+  uint8_t   setFreq(uint32_t frequency_rx, uint32_t frequency_tx, uint8_t rf_power, uint32_t pocsag_freq_tx);
   void      setPower(uint8_t power);
   void      setMode(MMDVM_STATE modemState);
   void      setDecode(bool dcd);
diff --git a/SerialPort.cpp b/SerialPort.cpp
index d6d2d37..8ee44b5 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -388,31 +388,41 @@ uint8_t CSerialPort::setMode(const uint8_t* data, uint8_t length)
 
 uint8_t CSerialPort::setFreq(const uint8_t* data, uint8_t length)
 {
-    uint32_t freq_rx, freq_tx;
-    uint8_t rf_power;
+  uint32_t freq_rx, freq_tx, pocsag_freq_tx;
+  uint8_t rf_power;
 
-    if (length < 9U)
-      return 4U;
-
-    // Old MMDVMHost, set full power
-    if (length == 9U)
-      rf_power = 255U;
+  if (length < 9U)
+    return 4U;
 
-    // New MMDVMHost, set power from MMDVM.ini
-    if (length == 10U)
-      rf_power = data[9U];
+  // Very old MMDVMHost, set full power
+  if (length == 9U)
+    rf_power = 255U;
+
+  // Current MMDVMHost, set power from MMDVM.ini
+  if (length >= 10U)
+    rf_power = data[9U];
+
+  freq_rx  = data[1U] << 0;
+  freq_rx |= data[2U] << 8;
+  freq_rx |= data[3U] << 16;
+  freq_rx |= data[4U] << 24;
+
+  freq_tx  = data[5U] << 0;
+  freq_tx |= data[6U] << 8;
+  freq_tx |= data[7U] << 16;
+  freq_tx |= data[8U] << 24;
+
+  // New MMDVMHost, set POCSAG TX frequency
+  if (length >= 14U) {
+    pocsag_freq_tx  = data[10U] << 0;
+    pocsag_freq_tx |= data[11U] << 8;
+    pocsag_freq_tx |= data[12U] << 16;
+    pocsag_freq_tx |= data[13U] << 24;
+  }
+  else
+    pocsag_freq_tx = freq_tx;
 
-    freq_rx  = data[1U] * 1U;
-    freq_rx += data[2U] * 256U;
-    freq_rx += data[3U] * 65536U;
-    freq_rx += data[4U] * 16777216U;
-    
-    freq_tx  = data[5U] * 1U;
-    freq_tx += data[6U] * 256U;
-    freq_tx += data[7U] * 65536U;
-    freq_tx += data[8U] * 16777216U;
-    
-    return io.setFreq(freq_rx, freq_tx, rf_power);
+  return io.setFreq(freq_rx, freq_tx, rf_power, pocsag_freq_tx);
 }
 
 void CSerialPort::setMode(MMDVM_STATE modemState)