期权谈判自动机通常提供有限状态自动机。与大多数有限状态机一样，事件，动作和状态转换是此有限状态自动机的各种属性。这些属性之一(即事件)通常会导致点对点协议(PPP)连接从一种状态转换为另一种状态。这称为状态转换。
事件基本上是外部事件之一，或者是任何启动或触发状态机以将状态从一个更改为另一个或保持其当前或当前状态的命令之一。由于事件也会触发动作。
因此，可以说状态转换和动作都是由于事件无限自动机引起或启动的。
总共有13个事件导致不同的PPP过渡状态之一。这些事件在下表中给出：
| Event | Description |
|---|---|
| Up | This event label simply means that lower layer is Up. This event only occurs when it gets signals from lower layer that it is ready to transmit data frames. This event also indicates to LCP (Link Control Protocol) that connection or link is going to enter link establishment phase i.e. establishment of connection will take place through exchange of data frames or packets. |
| Down | This event label simply means that lower layer is Down. This event only occurs when it gets signals from lower layer that it is now ready to transmit data frames. This event also indicates to LCP (Link Control Protocol) that connection or link is going to enter link dead phase i.e. termination of connection or link will take place. |
| Open | This event label simply means administrative open. This event indicates that connection or link is allowed to be Opened for exchanging data frames. |
| Close | This event label simply means administrative open. This event indicates that connection or link is not allowed to be Opened, instead, it will remain closed for exchanging data frames. |
| TO+ | This event label simply means timeout with counter is greater than 0. It indicates that restart timer is expired along with restart counter remains greater than zero. It will initiate retransmission of configure-request or terminate-request packets. |
| TO- | This event label simply means timeout with counter expired. It indicates that restart timer is expired along with restart counter no longer greater than zero. It will not initiate retransmission of configure-request or terminate-request packets. |
| RCR+ | This event label simply means receive configure requests is acceptable. It indicates that configure-request packet that is received from peer or client for wanting to open connection is good and acceptable. Therefore, it initiates transmission of corresponding configure-ack. |
| RCR- | This event label simply means receive configure request is unacceptable. It indicates that configure-request packet that is received from peer or client for wanting to open connection is not good and is unacceptable. Therefore, it initiate transmission of corresponding configure-nak or configure-reject. |
| RCA | This event label simply means receive configure acknowledgment. This event mainly occurs when a valid positive response i.e. configure-ack packet to configure-request packet is received from the client or peer. |
| RCN | This event label simply means receive configure nak/rej. This event mainly occurs when a valid negative response i.e. configure-nak or configure-reject packet to configure-request packet is received from the client or peer. |
| RTR | This event label simply means receive terminate request: This event occurs when terminate-request packet is received. This terminate-request packet indicates that the peer or client wants to close or terminate the link or connection. |
| RTA | This event label simply means receive terminate acknowledgment. This event generally occurs peer or client sends terminate-ack packet in response to terminate-request packet. |
| RUC | This event label simply means receive unknown code. This event generally occurs peer or client sends an un-interpretable packet i.e. Code-reject packet in response. |
| RXJ+ | This event label simply means receive code reject permitted or receive protocol reject. This event occurs when peer or client sends code-reject or protocol reject packet that is acceptable like code-reject of an extended code or protocol rejects of NCR. |
| RXJ- | This event label simply means receive code reject catastrophic or receive protocol reject. This event occurs when peer or client sends code-reject or protocol reject packet that is unacceptable like code-reject of configure-request or protocol reject of LCP. |
| RXR | This event label simply means receive echo requests, receive echo reply, or receive discard requests. This event occurs when packet i.e. echo-request, echo-reply or discard request is sent by the peer or client. |