The main function of MCF is to transmit various messages needed by NM(network management) s between the NM system and network element (NE) equipment as well as between respective NE equipment so as to accomplish the functions of maintenance and management messages communication of OptiX BWS 320G system. Such messages mainly refer to the byte D1~D12 of the data communication channel DCC of OptiX BWS 320G system optical supervisory channel, DCC byte contents derived from MCF functional block, D1~D12 byte positions set in E1 frame of the optical supervisory channel.
MCF also provides F&f interface and X.25 interface connected between OptiX BWS 320G system and NM system to accomplish the communication function between the synchronous equipment and NM system.
n Software function
The main function of BIOS software is to boot the system, load and upgrade the Host software, and perform hardware self-test of the main control unit SCC.
The main function of the host software is to perform real time monitoring, maintenance and management on the OptiX BWS 320G system NEs and the whole transmission equipment network by means of the cooperation of OptiX BWS 320G NM system and SCC board hardware. The host software is mainly composed of the communication module (CM) and the administration module (AM). CM is mainly engaged in performing message communication function, supporting the transmission of running, management and maintenance information between BWS 320G NM system and NE equipment as well as between the NEs; while AM is mainly engaged in synchronous equipment management functions, and supporting such functions as configuration management, alarm management, performance management, security management and topology management of OptiX BWS 320G NM system.
3. Application
n SCC board is always inserted in the 14th board position of OptiX BWS 320G subrack.
n Reset key RST
This key is used to reset SCC. Press this key with a sharp-tip object to reset SCC.
n Alarm switch ALC
This switch is used to turn on or turn off the buzzer alarm on the rack top.
NM system can set up the communication link with OptiX BWS 320G system through SCC in multiple modes. Below we'll explain in details.
n One-to-one connection between NM and gateway NE
The following connection modes are available：
(1) Connection with direct-connected network cable
Connection between NM terminal and OptiX BWS 320G system with direct-connected network cable is safe and quick, with least influence on the NE equipment and NM operating system. This is related to the data transmitting mode of ethernet. When one user plans to transmit data, he first check whether there is any conflict of the current timeslot. If there is, he'll wait for the next timeslot to transmit. It can be imagined: the less NE equipment that are connected on the network line, the less possibility that conflicts would happen. Therefore, in order to ensure the normal data transmission, this kind of direct-connected network cable connection is most widely used. Figure 3-21 shows the schematic diagram of such direct-connected network cable connection.
Figure3-21 Direct-connected network cable connection
In Figure 3-21, one end of the network cable is connected to the ethernet interface of NE equipment, while the other end is connected to the netcard interface of OptiX BWS 320G NM terminal. But it should be mentioned here that connection of multiple gateways or multiple NMs can not be realized in this mode.
(2)LAN connection
When LAN is available, we can make use of the LAN. Compared with the above network cable connection, LAN connection can realize the connection of multiple gateways or multiple NMs. But when the network is of a large scale, the performance of NM system might be affected by the network bottlenecks. Make sure that the IP addresses of gateway equipment do not conflict with those of other equipment on the network. This connection mode is shown in Figure 3-22.
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