Currently, the 3G network construction is in full swing, and the continuous expansion and gradual IP evolution of the mobile backhaul network is launched to guarantee the depth and width of mobile signals and thus to adapt to the gradual incense in users and to meet the requirements for bandwidth. The TCAT is an automatic product developed by Huawei based on the trail cutover during OAM of carriers. It breaks the traditional trail cutover mode of the carriers and solves three problems in the traditional trail cutover: labor-consuming, highly risky, and long signal loss. The TCAT is the value added tool that is developed based on the iManager T2000 and U2000 network management systems (NMSs). The existing NMSs can support the functions of the TCAT through upgrade. Therefore, the deployment is simple and it is convenient to perform operations.

Based on the profound understanding of the operation and maintenance in the access network, Huawei has launched the iManager 2510 line assurance system (hereinafter referred to as the N2510). As an industry-leading integrated optical-copper line expert, the N2510 is characterized by "accurate, stable, fast". N2510 can help carriers to locate faults accurately, improve line quality, improve the service provisioning efficiency, and improve line bandwidth, which in turn improve service quality and reduce OPEX.

The U2520 is the new-generation service assurance system that is developed by Huawei, features high precision and high performance, and is used to manage the service quality in the IP domain. The IP transformation of bearer networks is an inevitable trend. With the rapid progress of services such as the IPTV service and the enterprise private line service, operators invest high in the IP and SA domains increasingly, with yearly compound growth exceeding 20%. The U2520 is the dashboard that is oriented to the IP service quality. Specifically, it monitors IP service quality, locates service faults and identifies causes of the faults, supports the pre-warning about the deterioration of the service quality, and implements the operation and maintenance (OAM) of an IP network in an unsolicited manner. In the case of the OAM of an IP bearer network, the U2520 can provide the quantitative data of the quality of experience (QoE) that reflects the end user satisfaction. In this manner, the IP OAM department and the service department can obtain the data of the same dimension, which reduces the difficulty in determinig the fault owner effectively. Therefore, the faults in the IP domain need not be located by experts across departments, which increase the OAM efficiency effectively and improve the end user satisfaction.

ASON has been an inevitable trend of the transport network. The ASON features bring higher resource usage, more flexible service grooming, and higher network survivability. At the same time, ASON brings new challenges to the network planning and maintenance of operators. How to quickly plan network capacity network-wide in the most optimized way? How to perform an all-round check on the network planning data to meet various security requirements of operators? How to appraise network security and find out the bottleneck where network congestion may occur? These are the new challenges to operators.