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1. A certain switch is configured as follows: it has a capacity of 256 lines, with 3 16-line digital subscriber boards, 10 16-line analog subscriber boards, 4 8-line/4-line E/M boards, and 1 2M digital trunk line board. Is it reasonable?
Based on the information provided, we can calculate the capacity utilization of the switch. First, the total capacity of the switch is 256 lines. The number of lines occupied by various user boards and channel boards is as follows: – 3 pieces of 16-line digital user boards: 16 lines × 3 pieces = 48 lines – 10 pieces of 16-line analog user boards: 16 lines × 10 pieces = 160 lines – 4 pieces of 8-line/4-line E/M boards: 8 lines × 4 pieces = 32 lines – 1 piece of 2M digital relay board: Typically, one 2M digital relay board can provide 30 voice channels; however, it does not occupy user lines, as these are relay channels used for communicating with other switching devices. When we add up all the user boards (48 + 160 + 32 = 240 lines), it seems to be within the switch’s capacity range. It should be noted here that although the 2M digital relay board does not occupy the user lines, it requires the switch to have sufficient channel processing capacity to handle these 30 channels. This is usually related to the software and hardware resources of the switch; it is necessary to check the specific specifications of the switch to ensure compatibility and processing capacity. Therefore, on the surface, this configuration is reasonable in terms of the number of lines, as it does not exceed the switch’s 256-line capacity. However, to determine whether it is truly reasonable, the following points need to be considered: 1. Whether the processing capacity of the relay board exceeds that of the switch or the limits permitted by its design. 2. Have redundancy and future expansion needs been considered? 3. The actual traffic volume of the switch (such as call volume during peak hours) and its performance requirements must be taken into account to ensure that service quality does not decline under heavy load. 4. Based on practical applications, determine whether the ratio of analog user boards to digital user boards meets the actual requirements. 5. Do other functions provided by the switch require additional cards or hardware resources? In short, this configuration seems reasonable in terms of quantity, but whether it can meet actual operational requirements depends on a detailed consideration of the switch’s various performance aspects and practical application needs. .
3×16+10×16+4×8+1×32=272 lines > 256 lines, so the configuration is incorrect.