设备首先使用一个信令交换过程来建立到ATM目的地的路径。
Devices first use a signaling process to establish a path with an ATM destination.
软交换涉及的产品主要有负责核心控制的软交换设备、应用服务器、媒体服务器、接入网关、中继网关、信令网关、IAD设备。
Products softswitch involves mainly include: softswitch equipment for core control, application server, media server, access gateway, relay gateway, signaling gateway, and IAD equipment.
作为下一代网络(NGN)的重要设备之一，信令网关(SG)必须具备99。
As one of the important devices for NGN, Signaling Gateway (SG) must have High Availability (ha) of 99.
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