Version Description The functional version of the CSHA/CSHB/CSHC is SLA1. Application CSHA/CSHB/CSHC boards function as system control, switching, and timing boards on OptiX RTN 910 NEs building Hybrid radio networks. In this scenario, these boards also receive and transmit E1/STM-1/FE/GE services. The selection of CSHA, CSHB, or CSHC boards depends on desired port types and port quantities. Figure 1 Application scenario of CSHA/CSHB/CSHC 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 E1 interface boards, STM-1 interface boards, or Ethernet interface boards. CSHA/CSHB boards must work in conjunction with STM-1 interface boards for receiving and transmitting STM-1 services. To transmit IEEE 1588v2 packets through Ethernet ports on system control, switching, and timing boards, use CSHD/CSHE boards. Functions and Features The CSHA/CSHB/CSHC provides 4.2 Gbit/s packet switching, full time-division cross-connection, system control and communication, and clock processing functions. The CSHA/CSHB/CSHC provides FE/GE service ports, PDH/SDH service ports, auxiliary ports, and management ports. Table 1 lists the functions and features that the CSHA/CSHB/CSHC supports. Table 1 Functions and features that the CSHA/CSHB/CSHC supports Function and Feature Description CSHA CSHB CSHC Basic functions Switching capacity Supports 4.2 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 synchronization at the physical layer 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 IEEE 1588v2 Processes IEEE 1588v2 messages. External clock port 1 External time port 1 DCN Outband DCN Supports a maximum of five DCCs. Supports a maximum of five DCCs. Supports a maximum of seven 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 For details, see Table 2. QoS functions Supported For details, see Table 3. Ethernet service functions Supported For details, see Table 4. SDH service functions Not supported Not supported Supported For details, see Table 5. PDH service functions Supported For details, see Table 6. 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
