The CSHO boards have two functional versions: SLF1 and SLF2.
SLF2 supports L3VPN functions, the E1 interface can be configured as a T1 interface and WLAN modules, whereas SLF1 does not.
Application:
CSHO boards function as system control, switching, and timing boards of RTN 950A. They converge and groom various services through GE/STM-1/E1 service ports and TDM/hybrid/packet microwave ports. The E1 interface supports the T1 function. The E1 service is used as an example to describe the application scenario. For the T1 service, the application scenario is similar.
Figure 1 Application scenario of CSHO boards
NOTE:
In the preceding figure, IF boards must be general-purpose IF boards or XPIC IF boards working in native E1+Ethernet or native STM-1+Ethernet mode.
Service boards shown in the preceding figure can be native E1 interface boards, smart E1 interface boards, STM-1 interface boards, channelized STM-1 interface boards, or Ethernet interface boards.
Ethernet ports on CSHO boards can carry MPLS tunnels, which allow CSHO boards to transmit Multiprotocol Label Switching (MPLS) and pseudo wire emulation edge-to-edge (PWE3) services traversing microwave networks and regional backhaul networks in end-to-end mode.
Functions and Features:
CSHO boards provide 10 Gbit/s packet switching capacity, full time-division cross-connection, system control and communication, and clock processing functions. In addition, CSHO boards provide GE, STM-1, E1/T1, auxiliary, and management ports.
Table 1 lists the functions and features that CSHO boards support.
Table 1 Functions and features that CSHO boards support
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