only use one port with CDMA at the moment.

libraries/net/cellular/UbloxUSBModem/UbloxModem.cpp

@@ -443,6 +443,7 @@ int UbloxUSBModem::init()
     {
       INFO("Using a u-blox LISA-C200 CDMA Modem");
       m_gsm = false;
+      m_onePort = false;
     }
     else
     {

libraries/net/cellular/UbloxUSBModem/UbloxModem.h

@@ -128,8 +128,8 @@ private:
   bool m_ussdInit;        //< Has USSDInterface object (m_ussd) been initialised? true/false
   bool m_linkMonitorInit; //< Has LinkMonitor object (m_linkMonitor) been initialised? true/false
   bool m_atOpen;          //< Is the interface to the ATCommandsInterface open? true/false
-  bool m_onePort;
 protected:
+  bool m_onePort;
   bool m_gsm;
 };