Eventually, IP telephony will prevail, and the traditional PBX will be a museum piece.最终，网络电话将大行其道，而传统的程控交换机将成为古董。We provide support for users of mobile and fixed-line telephony.我们为使用移动和固定电话的用户提供支持。These optical fibres may be used for new sorts of telephony.这些光缆可以用于新型电话通讯系统。