The initial step is to process the SIP INVITE message and respond with a 200 OK.

初始步骤是处理SIP INVITE消息并使用一个200 OK进行响应。

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The ibm.com server looks up the NAPTR record for example.com and forwards the INVITE message to that example.com server.

服务器将查找 example.com 的 NAPTR 记录，并将 INVITE 消息转发给 example.com 服务器。

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After the connection is made to the client, the server sends the INVITE message to the client and a provisional response (Trying) back to the client that sent the message.

建立了到客户机的连接后，服务器将向客户机发送INVITE消息，并向发送该消息的客户机回发一个临时响应(Trying)。

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Users send an invite by email or text message, and the invitee taps a button to enter a browser chat, which opens a browser-based chat room on their phone.

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