1·If virtual LAN (VLAN) trunking is available, where multiple network subnets can be accessed simultaneously through the same physical adapter, this method does not use that benefit.
如果可以使用虚拟LAN (VLAN)中继，就可以通过同一个物理适配器同时访问多个子网，但是这种方法无法享有这一好处。
2·Two other cables from the receiving equipment drop in trunking in the central service duct of the tower block and then continue underground in 25 mm polythene conduit.
另外两个电缆从在大楼中央服务管中继接收设备，然后继续下跌地下25毫米聚乙烯管道。
3·Trunking Media Gateway transmits media stream between IP and circuit switching networks, implements interworking of IP and circuit switching networks with signaling gateway in Softswitch network.
在软交换网络体系中，IP中继媒体网关完成电路交换网侧与IP分组网络侧媒体流的转换，同信令网关一起完成电路交换网与IP网络的互通。