virtual concatenation

The key technologies of SDH such as asynchronous mapping, pointer processing, Virtual Concatenation ( Vcat) and Link Capacity Adjustment Scheme ( LCAS) are applied in this system with which the primary block signal E1 and Ethernet data can be accessed through SDH network together.

该系统综合运用了SDH的异步映射、指针处理、虚级联（Vcat）、动态链路容量调整（LCAS）等关键技术，实现了一次群信号E1和以太网数据在SDH上的接入。

With VC-12 virtual concatenation, we can make efficient and flexible use of the bandwidth.

VC-12虚级联技术是近期才做出正式协议规定的，通过它可以灵活的分配带宽，同时对传输设备没有任何要求，最大限度的利用了网络。

The SDH/ SONET Virtual Concatenation Technology

SDH/SONET虚拟级联技术

GFP, virtual concatenation and link capacity adjustment scheme facilitate SDH to transport data service and voice service.

通用成帧规程、虚级联和链路容量调整机制三项新技术使得SDH设备实现了数据业务和话音业务的综合传输，SDH发展成了多业务传送平台。