# Get dedicated radio bearer status and indication

This sample application demonstrates how to get dedicated radio bearer status and indication.

1. Implement IServingSystemListener listener class

class ServingSystemListener : public telux::data::IServingSystemListener {
     public:
       ServingSystemListener(SlotId slotId) : slotId_(slotId) {}
       void onDrbStatusChanged(telux::data::DrbStatus status) override {
         std::cout << "\n onDrbStatusChanged on SlotId: "
                     << static_cast<int>(slotId_) << std::endl;
         switch(status) {
             case telux::data::DrbStatus::ACTIVE:
                 std::cout << "Current Drb Status is Active" << std::endl;
                 break;
             case telux::data::DrbStatus::DORMANT:
                 std::cout << "Current Drb Status is Dormant" << std::endl;
                 break;
             case telux::data::DrbStatus::UNKNOWN:
                 std::cout << "Current Drb Status is Unknown" << std::endl;
                 break;
             default:
                 std::cout << "Error: Unexpected Drb Status is reported" << std::endl;
                 break;
         }
       }
    
     private:
       SlotId slotId_;
    };
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2. Optioanlly, instantiate initialization callback

auto initCb = [&](telux::common::ServiceStatus status) {
         subSystemStatus = status;
         subSystemStatusUpdated = true;
         cv_.notify_all();
    };
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3. Get the DataFactory and data serving system manager instance and check if the data serving system manager is ready or not

auto &dataFactory = telux::data::DataFactory::getInstance();
    do {
        subSystemStatusUpdated = false;
        std::unique_lock<std::mutex> lck(mtx_);
        dataServingSystemMgr = dataFactory.getServingSystemManager(slotId, initCb);
    
        if (dataServingSystemMgr) {
            std::cout << "\n\nInitializing Data Serving System manager subsystem on slot " <<
                 slotId << ", Please wait ..." << std::endl;
            cv_.wait(lck, [&]{return subSystemStatusUpdated;});
            subSystemStatus = dataServingSystemMgr->getServiceStatus();
        }
    
        if (subSystemStatus == telux::common::ServiceStatus::SERVICE_AVAILABLE) {
            std::cout << " *** DATA Serving System is Ready *** " << std::endl;
            break;
        }
        else {
            std::cout << " *** Unable to initialize data Serving System *** " << std::endl;
        }
    } while (1);
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4. Register for serving system listener

dataServingSystemMgr->registerListener(dataListener);
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5. Get dedicated radio bearer Status

telux::data::DrbStatus drbStatus = dataServingSystemMgr->getDrbStatus();
    
    switch(drbStatus) {
         case telux::data::DrbStatus::ACTIVE:
         std::cout << "Current Drb Status is Active" << std::endl;
         break;
         case telux::data::DrbStatus::DORMANT:
         std::cout << "Current Drb Status is Dormant" << std::endl;
         break;
         case telux::data::DrbStatus::UNKNOWN:
         std::cout << "Current Drb Status is Unknown" << std::endl;
         break;
         default:
         std::cout << "Error: Unexpected Drb Status is reported" << std::endl;
         break;
    }
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Now, wait for dedicated radio bearer notifications.

Last Published: Jun 24, 2026

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