Cable companies now offer broadband Internet and voice services over networks that used to carry just television, and telecoms firms have upgraded their networks to carry television signals.

有线电视公司现在可以通过他们以前只能传送电视节目的网络提供宽带互联网和语音业务了，而电信公司通过网络升级也可以提供电视信号。

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The delivery of voice calls using VoLTE is similar to the voice over IP, or VOIP, phone services offered by many cable and Internet-service providers.

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Voice communications currently represent only a tiny part of the massive amounts of data carried over the cable networks.

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Cable, wireless and satellite providers are free to provide voice service (or not) over the network of their choosing, and they are free to pick and choose which homes to serve.

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