As one of the important devices for NGN,Signaling Gateway(SG) must have High Availability(HA) of 99.999% to meet the QoS requiremets of telecom operators and users.

• 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.；999%25的高可用性(HA)；以满足运营商和客户对于服务质量的要求。