# Link layer interruption (smart data link)

Source: [https://docs.qualcomm.com/doc/80-PK177-134/topic/link_layer_interruption.html](https://docs.qualcomm.com/doc/80-PK177-134/topic/link_layer_interruption.html)

The LinkInterrupt subsystem provides the client with APIs to subscribe to link
        interrupt events. Application vendors can subscribe for link interruption events happening
        around handoff. These APIs are part of smart data link.

Note: Link layer interruption (smart data link) is an experimental feature.

- **[LLI subsystem APIs](https://docs.qualcomm.com/doc/80-PK177-134/topic/lli_subsystem_apis.html)**
- **[LLI subsystem callback interfaces](https://docs.qualcomm.com/doc/80-PK177-134/topic/lli_subsystem_callback_interfaces.html)**
- **[LLI enums](https://docs.qualcomm.com/doc/80-PK177-134/topic/lli_enums.html)**
- **[LLI structs](https://docs.qualcomm.com/doc/80-PK177-134/topic/lli_structs.html)**
- **[Interrupt event sequence](https://docs.qualcomm.com/doc/80-PK177-134/topic/interrupt_event_sequence.html)**  

Normal sequence of pre-handoff and handoff interrupt events with associated         data.
- **[Example code](https://docs.qualcomm.com/doc/80-PK177-134/topic/example_code_QC_3.html)**

**Parent Topic:** [Modem API](https://docs.qualcomm.com/doc/80-PK177-134/topic/modem.html)

Last Published: Nov 14, 2024

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