Interface Processing Subsystem BSC6900

Interface Processing Subsystem

Position of the Interface Processing Subsystem in the BSC6900 System

The interface processing subsystem consists of three types of interfaces: ATM interfaces, IP interfaces, and TDM interfaces. Figure 3-13 and Figure 3-14 show the position of the interface processing subsystem in the MPS/EPS and TCS respectively, with the interfaces highlighted in apricot.

Functions

· The interface processing subsystem provides the following types of ATM, IP, and TDM interfaces.

– E1/T1 electrical ports

– Channelized STM-1/OC-3 optical ports

– Unchannelized STM-1/OC-3 optical ports

– FE/GE electrical ports (FE= Fast Ethernet, GE=Gigabit Ethernet)

– GE optical ports

· The interface processing subsystem processes transport network messages and, also hides differences between them within the BSC6900.

· On the uplink, the interface processing subsystem terminates transport network messages at the interface boards. It also transmits the user plane, control plane, and management plane datagrams to the corresponding service processing boards. The processing of the signal flow on the downlink is the reverse of the processing of the signal flow on the uplink.

Hardware Involved

The interface processing subsystem consists of the Iu, Iur, Iub, Abis, A, Ater, Gb, and Pb

interface boards