L2CAP SDU

• A data unit that the application can send/receive to/from a peer.

L2CAP PDU

• A data unit that is exchanged between local and remote L2CAP entities. It consists of L2CAP protocol control information and payload fields. The payload field can contain an L2CAP SDU or a part of an L2CAP SDU.

L2CAP MTU

• The maximum length of an L2CAP SDU.

L2CAP MPS

• The maximum length of an L2CAP PDU payload field.

Credits

• A value indicating the number of L2CAP PDUs that the receiver of the credit can send to the peer.