一方面，他们可以通过使用语音网络技术电话在自己的网络上来承接自己内部的通话业务，从而使得自己的运营成本降低。
On the one hand they have been able to reduce their own costs by adopting VoIP internally to carry calls around their networks.
为了解决有线业务收入衰退的问题。除了着眼于无线业务和将通话计划与国际互联网和电视服务捆绑销售之外，运营商正在寻求其他几种方式。
Carriers are seeking to address declining revenue in the landline business several ways besides focusing on the wireless business and bundling calling plans with Internet and television service.
一个才设立没有老的通话业务需要保护名叫Yota的公司已建成了一个从无到有的4 G网络，埋藏了3000公里(1,864英里)的光纤电缆以连接无线基站。
Yota, a start-up with no old voice business to protect, has built a 4g network from scratch, burying 3,000km (1,864 miles) of fibre-optic cables to connect its wireless base stations.
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