SIPRFC 3261提供了对各种SIP headers，信息元素与可用状态码的完整描述。

The SIP RFC 3261 provides a complete description of the various SIP headers, message elements, and the status codes available.

youdao

当你的形式是完整的，你一定可以提供正确的信息输入'验证码'然后按'注册'。

When your form is complete and you are sure you provided the correct information you enter the 'Verification code' and press 'Register'.

youdao

当你的形式是完整的，你一定可以提供正确的信息输入'验证码'然后按'注册'。

When your form is complete and you are sure you provided the correct information you enter the 'Verification code' and press 'Register'.

youdao