Ovrrbu-bts. Pdf
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- Điều hướng trang này:
- Online State.
- Offline state.
- SU BIT
| Initialization State. This state is defined by a cold start or power-on reset on the FRU. BIT is always
applied immediately with the results of the test used by software to determine the follow-on state. A successful initialization BIT transitions the FRU to an in-service state and an unsuccessful BIT transitions it to an out of service state. Online State. This state defines the FRU as active and in-service. The FRU may be continually monitored or polled for status while in the online state. Limited BIT routines may be applied periodically whenever the FRU is idle or as a part of routine testing such that it does not interfere with active users. Offline state. This state defines the FRU as out of service. BIT can be applied at anytime under control of the EMS software or System Operator as defined above. RBU BIT - The RBU Built In Tests are the basic set of tests that are used to determine that the system may be brought into service and for detecting and isolating faults once the system has transitioned to an in-service operational configuration. During the initialization state, BIT is performed on the partitioned (Dual Redundancy) FRUs first. All FRUs associated with the partition must successfully complete the scripted BIT routines to allow the partition to transition to an in-service state. To complete the initialization state, the designated online Link Control Processor (LCP) ensures that BIT is performed on all the remaining FRUs. In the case of select FRUs not passing the initialization BIT but where limited operational status may still be achieved, the operator is presented with the option of proceeding to a degraded in-service mode. SU BIT - The BIT for the SU is applied at SU initialization or upon request by the RBU (EMS). The SU is originally initialized during the provisioning of the unit at the customer location. Once installation has proceeded to the point of applying power to the SU, the SU BIT will verify the CCA (modem, RFFE, subscriber interface) operational status as well as that of the power supply (including battery backup) prior to entering an online state. Once link availability is established, the results of the installation and BIT are reported to the RBU and the SU is transitioned to an in-service state. Once the operational state is obtained, the SU continuously monitors the forward channel bit error rate and the status of the primary power, making this information available to the EMS on demand. In addition to the unit specific tests for both the RBU and the SU, the EMS is able to command the initiation of system level BIT activities involving both the RBU and the SU. These include various RF and digital loopbacks, a make/break dial tone test, a telephone (or X.21 DTE) present test, and the monitoring of an extensive list of link performance data (Error Free Seconds, Bit Error Rate, etc.). tải về 0.71 Mb. Chia sẻ với bạn bè của bạn:
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