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An Analysis of the importance of the clock in the switch


(Clock signals include: OPI'SK, OFI2M, OPT4M); CKs-CKI) _ + QsE16 (SI'U) a transmission system for a D1. M-sM2 the BNET; SM's BNEpDA + RSM2 the BNET (Peng KO +, DTSK0 one, DTSK1 +, DTSKI I). 3.2.3s ~ L / RS ~ L/sM2/RS SM module internal clock signal flow within the main control box of the board of the clock signal is provided directly by the BNET board. Other boxes of the board of the clock signal through the CKV BNET board board output, and then sent to the interface through the HW clock line box of the cell plate. Master clock transmission lines and related board is designed to let us know clock system possible point of failure, the failure occurred, according to largely determine the range of symptoms, combined with the signal flow for the next step. Because we know from a hardware perspective, the fault may be only divided into two parts, one dealing with class veneer clock, and second transmission lines. Cascading analysis, exclusion methods, can quickly find the trouble spots. 4 summarizes the actual maintenance of combined experience from the case, we can know C & C08 switch, the clock system plays a very important role indeed, almost every machine frame, the normal work of each board can not do without the clock system, once clock source or transmission line fails, will the corresponding part of switching module or board impact, causing severe failure (such as the master clock system problems, etc.) can lead to paralysis of the exchange system. The general problem is the clock can not be ignored, the user can easily call on the large area of ​​impact. Therefore, in the daily process, switch maintenance personnel must pay attention to the clock system of inspection and maintenance, regular inspection system and the switch time clock (the clock used to maintain class action command see Appendix). Under normal circumstances the maintenance of just using the query command, such as observation CKS clock board is in tracking status, when there is an exception for other operations need to be like heavy, mostly because of the operation of the clock module or global, can be made when necessary Huawei 800 assistance. In addition, SETEXTM (modified switch time), the order must be careful, once the error, then one will have a serious impact on billing, such as causing the wrong one, heavy one and so on. Proposed change under normal circumstances are not easily switch time, to change the traffic a little time in the evening also carried out must be completed to verify. Our work,[link widoczny dla zalogowanych], we need to do a lot, especially the work plan as a maintenance base, it is recommended be sure to check the clock type of work included, to ensure that the clock system to work properly. [
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