Overall noise of this system is pelow10.000pwop in the 2500km hypotheti-cal reference circuit. 2500pwop of the total noise is allococated to the thetical equipment and 7500pwop to the repeatered line which Sufficiently Satisfies the CCITT Recommendation.

• 在2500Km的模拟参考电路上的总杂音小于10,000pwop,其中分配终端设备的杂音为2500pwop,线路增音设备为7500pwop,这完全符合CCITT的建议。