Only the channel that is actually being watched is sent from the fibre network down the broadband link.
从纤维网络到宽带联结点每次只能承载一个电视频道，这就能保证不同的视频流传送到每一个用户家中。
2
Each is connected, via a fibre-optic link, to a data centre in which the images are recognised and checked against a database of those vehicles that have paid or are exempt.
The damage was detected by a system monitoring the fibre-optic link from western Europe and a security team was immediately dispatched to the spot, where the woman was arrested.