Version Description The functional version of the CSHE is SLA1. The functional versions of the CSHD are SLA1 and SLA2. Compared with the SLA1CSHD, the SLA2CSHD incorporates the following new functions: Multiprotocol label switching transport profile (MPLS-TP) tunnel OAM ETH pseudo wire emulation edge-to-edge (PWE3) packets carrying control words Virtual private LAN services (VPLSs) Application CSHD/CSHE boards function as system control, switching, and timing boards on OptiX RTN 910 NEs building Packet radio networks. In this scenario, these boards also receive and transmit E1/FE/GE services. Use CSHE boards if fixed GE electrical ports are required (for example, to achieve synchronous Ethernet or IEEE 1588v2 functionality). Otherwise, use CSHD boards if possible. Figure 1 Application scenario of CSHD/CSHE boards NOTE: IF boards shown in the preceding figure must be general-purpose IF boards or XPIC IF boards working in native E1+Ethernet mode or native STM-1+Ethernet mode. Service boards shown in the preceding figure can be Smart E1 processing boards or Ethernet interface boards. Ethernet ports on CSHD/CSHE boards can carry MPLS tunnels, which allow CSHD/CSHE boards to transmit MPLS/PWE3 services traversing radio networks and regional backhaul networks in end-to-end mode. Like CSHA/CSHB/CSHC boards, CSHD/CSHE boards can function as system control, switching, and timing boards on OptiX RTN NEs building Hybrid radio networks. If IEEE 1588v2 packets need to be transmitted using Ethernet ports on system control, switching, and timing boards, CSHD/CSHE boards must be installed. Functions and Features The CSHD/CSHE provides 4.4 Gbit/s packet switching, full time-division cross-connection, system control and communication, and clock processing functions. The CSHD/CSHE provides FE/GE ports, E1 ports, auxiliary ports, and management ports. Table 1 lists the functions and features that the CSHD/CSHE supports. Table 1 Functions and features that the CSHD/CSHE supports Function and Feature Description Basic functions Switching capacity Supports 4.4 Gbit/s packet switching function. Cross-connect capacity Supports full time-division cross-connections (equivalent to 8x8 VC-4s) at the VC-12, VC-3, or VC-4 level. System control and communication Manages, monitors, and controls the running status of the IDU, and works as a communication service unit between the NMS and boards to help the NMS to control and manage the NE. Clock Clock source Provides the system clock and frame headers for service signals and overhead signals for the other boards when tracing an appropriate clock source. The traced clock source can be any of the following: External clock SDH line clock PDH tributary clock Radio link clock Synchronous Ethernet clock Clock protection Supports the following clock protection schemes: Protection based on clock source priorities Protection by running the SSM protocol Protection by running the extended SSM protocol ACR Supported IEEE 1588v2 Processes IEEE 1588v2 messages. External clock port 1 External time port 2 DCN Outband DCN Supports a maximum of five DCCs. Inband DCN Supports the inband DCN function. The DCN bandwidth is configurable. Network management protocols HWECC protocol Supported IP protocol Supported L2 DCN Supported SNMP protocol Supports query of NE alarms, performance events, and partial configurations using SNMP. MPLS/PWE3 functions Supported See Table 2. QoS functions Supported See Table 3. Ethernet service functions Supported See Table 4. E1 service functions Supported See Table 5. Auxiliary ports and management ports NMS port 1 NMS serial port 1 NE cascade port 1 Orderwire phone port 1 Asynchronous data port 1 The transmission rate of the port is equal to or less than 19.2 kbit/s and the interfacing level complies with RS-232. Synchronous data port 1 The transmission rate of the port is 64 kbit/s and its specifications comply with ITU-T G.703. External alarm port Three inputs and one output Outdoor cabinet monitoring port 1 The specifications of port comply with RS-485. O&M Warm reset and cold reset Supported In-service FPGA loading Supported Board manufacturing information query Supported Board power consumption information query Supported Board temperature detection Supported Board voltage detection Supported Detection of indicators on the other boards Supported Pluggable CF card Supported The packet switching unit of the CSHD/CSHE works with its service interface unit or a service board to implement MPLS/PWE3 functions. Table 2 provides details about these functions.
