L2CAP links are used to transport L2CAP PDUs, which may carry the L2CAP signaling channel or framed user data submitted to user-instantiated L2CAP channels. L2CAP frames submitted to the baseband may be larger than the available Baseband packets. A link control protocol embedded within the LLID field preserves the frame-start and frame-continuation semantics when the frame is transmitted in a number of fragments to the receiver. Normally, L2CAP links give reliable delivery of data priority over timely delivery.

L2CAP链路用于传输L2CAP PDU，它可以携带L2CAP信令通道或提交给用户实例化的L2CAP通道的用户数据。提交给基带的L2CAP帧可能比可用的基带数据包大。嵌入在LLID字段中的链路控制协议在帧被分成多个片段传输到接收器时保留帧开始和帧继续语义。通常，L2CAP链路优先保证数据的可靠传递，而不是及时传递。