4800 or 9600 bps modems to extend the local loop interface to a remote location
腾讯元宝使用指南 图源：元宝官方
，详情可参考旺商聊官方下载
It was one of several used to promote the latest game in the Call of Duty series.
backpressure: 'strict' // or 'block', 'drop-oldest', 'drop-newest'