This basic INVITE flow (Figure 2) has user@ibm.com initiating a call with user@example.com.

基本INVITE流（图2）让 user@ibm.com发起对 user@example.com 的呼叫。

youdao

This basic INVITE flow (Figure 2) has user@ibm.com initiating a call with user@example.com.

基本INVITE流（图2）让 user@ibm.com发起对 user@example.com 的呼叫。

youdao