CN21USIA1 Huawei Core Network

OSTA2.0 Hua wei T8280 USIA1 CN21USIA1 KWAD0USIA101 03052588 General Service Interface Unit Board

The structure of the T8280 subrack is described as follows:

• Front structure of the subrack

  • The subrack provides 14 slots for installing the universal process blades (UPBs) and switch units (SWUs).
  • The backplane is located in the subrack and is used to transmit signals between boards.
  • The fan trays are located under the board slots. The two fan trays can be maintained separately.
  • The slots for the shelf management Module (SMM) are located at the bottom front of the subrack. The SMM manages all the boards, fans, and power supplies of the subrack. Generally, two SMMs are configured.

• Rear structure of the subrack

  • The subrack provides 14 slots for installing the universal service interface units (USIs) and switch interface units (SWIs).
  • The slots for the shelf data Module (SDM) are located at the bottom rear of the subrack. The SDM and the SMM are installed in pairs. Two SDMs can be configured.
  • The power entry modules (PEMs) are located above the SDM boards. Each subrack has two PEMs working in the 1+1 backup mode, which can be maintained independently.

The IMS adopts the standard ATCA-based OSTA 2.0 hardware platform developed by Huawei.

The OSTA hardware platform is based on the ATCA and complies with the standards of Network Equipment Building System (NEBS) and European Telecommunications Standards Institute (ETSI). It has the following features and advantages:

• Extensively used for a long time on existing network.

  The ATCA-based OSTA 2.0 platform has been widely used in various products of Huawei since 2004, and has been proven on live networks.

• Complies with ATCA PCI Industrial Computer Manufacturers Group (PICMG) 3.0 and PICMG 3.1.

• Consumes less power.

  • Automatically lowers the working frequency of hardware in the case of low traffic, and thereby reduces power consumption.
  • Adopts the new hexad-core processor, which greatly reduces the CPU usage.
  • Replaces traditional hard-disk drives with solid-state drives.

  With the support of these features and advantages, the OSTA 2.0 platform can reduce the power consumption by 30%.

• High speed

  The high-speed serial data link and switching structure are adopted to support a data switching bandwidth of up to 2.5 Tbit/s.

• High availability

  All the front boards and back boards support hot swapping. All the critical components (such as power supply, fans, management modules, and various boards) are configured with redundancy backup. The availability of the system reaches 99.999%.

• Highly scalable

  The platform supports the interface expansion of the ATCA boards in a subrack, and subrack cascading through the interface boards.

• Easy to upgrade

  The speed of a backplane interface can be smoothly upgraded to 10 Gbit/s Ethernet interface. The performance of an interface board can be easily upgraded.

• Easy to manage

  The standard management buses are adopted to manage any part in the system.