A SIP response code for general maintenance purposes seems not to exist (reference: http://en.wikipedia.org/wiki/开发者_Go百科List_of_SIP_response_codes).
What kind of response code ( 1xx/2xx/3xx/4xx or 5xx ) should be used for maintenance mode?
503 Service Unavailable, see RFC3261, chapter 21.5.4 (Link). BTW, you should retag the question, although the error code scheme is similiar, SIP and HTTP are different protocols
目前还在坐月子期间，但是总是感觉精神抑郁，产后抑郁症的症状有哪些呢？freshwind
喜境牛奶光美肤仪适合出差旅行使用吗？
当贝f3放到4米之外会模糊吗ihaveonlybelief 17小时前 不会。当贝家用投影f3投150寸需要大约四米的距离。贝f3的投射比为1.2：1，投射的画面比例为16：9。投150英寸的画面，根据勾股定理可以计算出画面宽度约为33
少年少年 20小时前 1、顾清寒-A2 溢价3倍，尼尔联动皮肤目前没有返场。 2、沈妙-涂鸦少女
103010正在紧张有序的拍摄中，恰逢演员王昌瑞的生日。现场工作人员为他庆生，主演也送上祝福。
It seems to me Apple won\'t allow this, but I need to make sure. For an app we\'re building, we want to ask the user to enter payment information (including credit card details) to pay for tickets. T
I need to generate an XML output using Perl code.I\'m trying not to use any libraries,as it\'s very simple, temporary XML that gets used by another step in the process.
是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
加载中,请稍侯......
精彩评论