Figure 5 shows an example of an interactive service with a failed service. Letter from the representative, male! News of leaving the company. In the first example, the agreement stipulates that the money supply for receiving mail is M 1? ? ? (After the recovery failed)? , must follow to send square meters! ? (Open the connection) to another participant. In this example, the service policy? 1 is the protocol required by wrt. This is a different service? In addition, you can send mail cubic meters! ? (Continue processing) This protocol is not supported in this case. ?

Temporarily stop the flow for different parts of the protocol (see Figure 6? )? , interaction, need to stop receiving requestm4? ? Messagem5 will be sent later? ! ? (disconnected) or mail m6? ! ? (Pause processing)? . Service 1? , m6 does not support? ! ? . However, in this case, the service is interoperable 1 because all possible information can be transmitted and included in the protocol. ?

Does the protocol specification also include the expected interaction?

After the message comes out, as shown in Figure 7. ?

In this case, the agreement provides for an open connection?

Mail square meters! Should we follow the M5-type waiting interrupt request? Or take back the information money supply M 1? ? ? . Service 2 does not support recovery (via money supply M 1? ? ? )? , so you can't use the ingredients. So different services 1? Besides, I heard the diagnostic message M7? ? This is an unnecessary protocol, so it does not abolish interoperability.