Introduction to the Cross-Connect Board on Huawei OSN3500

Huawei OptiX OSN 3500 equipment supports the EoD board, which enables service conversion between the TDM domain and the packet domain.

Figure 1 shows the typical networking and application of the EDQ41.

Figure 1 Networking and application of the EDQ41 

The EDQ41 is applicable in five typical networking scenarios. Figure 2 shows the service signal flow in each application scenario.

• Application 1: The EDQ41 receives EoS services from other NEs and then converts the EoS services to packet services, therefore implementing transition from the STM-1/STM-4 SDH network to the GE/10GE packet network.
• Application 2: The EDQ41 receives EoS services from line boards on the same NE and then converts the EoS services to packet services, therefore implementing transition from the SDH network to the GE/10GE packet network.
• Application 3: The EDQ41 board receives SDH services (including SDH services and EoS services) from SDH line board, processes and then distributes the services to GE/10GE packet networks and STM-1/STM-4 SDH networks.
• Application 4: The EDQ41 board receives SDH services (including pure SDH services and EoS services) from SDH line boards, processes and then sends the services directly to the SDH network. In this case, the EDQ41 board functions like an SDH line board.

The EDQ41 supports the maximum processing capacity of 2.5 Gbit/s. Therefore, only 2.5 Gbit/s services of the services received from STM-N (1≤N≤64) line boards can be processed and sent to the packet network.

Figure 2 Service signal flow on the EDQ