3.3.3.1.4 Capabilities Response (DYNVC_CAPS_RSP)
The DYNVC_CAPS_RSP (section 2.2.1.2) PDU is sent by the DVC client manager to indicate the protocol version level it supports.
The version level supported is indicated by the value of the Version field. If the client doesn't respond with a Capabilities Response packet within 10 seconds, the server MUST NOT make any further attempts to send a DVC Create Request packet.