| ID | 数据年份 | 局用交换机容量 | #中央国有 | #地方国有 | 电话机部数 | #中央国有 | #地方国有 |
| 单位 | * | 万门 | 万门 | 万门 | 万部 | 万部 | 万部 |
| 1 | 1949 | 31.17 | 31.17 | 0 | 26.28 | 26.28 | 0 |
| 2 | 1950 | 32.09 | 32.09 | 0 | 27.67 | 27.67 | 0 |
| 3 | 1951 | 41.07 | 34.7 | 6.37 | 35.6 | 32.12 | 3.48 |
| 4 | 1952 | 47.11 | 39.47 | 7.64 | 38.98 | 34.73 | 4.25 |
| 5 | 1953 | 51.81 | 43.38 | 8.43 | 44.27 | 39.58 | 4.69 |
| 6 | 1954 | 56.84 | 47.2 | 9.64 | 50.25 | 44.75 | 5.5 |
| 7 | 1955 | 63 | 51.23 | 11.77 | 54.18 | 48.07 | 6.11 |
| 8 | 1956 | 86.58 | 58.64 | 27.94 | 69.25 | 58.53 | 10.72 |
| 9 | 1957 | 97.27 | 64.66 | 32.61 | 82.19 | 63.67 | 18.52 |
| 10 | 1958 | 142.1 | 71.6 | 70.5 | 124.42 | 74.52 | 49.9 |
| 11 | 1959 | 186.05 | 81.76 | 104.29 | 166.5 | 92.62 | 73.88 |
| 12 | 1960 | 231.26 | 91.9 | 139.36 | 203.84 | 106.36 | 97.48 |
| 13 | 1961 | 249.7 | 97.81 | 151.89 | 209.67 | 113.36 | 96.31 |
| 14 | 1962 | 243.07 | 97.95 | 145.11 | 195.95 | 111.22 | 84.73 |
| 15 | 1963 | 238.43 | 98.9 | 139.53 | 195.51 | 118.14 | 77.37 |
| 16 | 1964 | 239.93 | 100.81 | 139.12 | 201.9 | 122.6 | 79.3 |
| 17 | 1965 | 260.7 | 110.58 | 150.11 | 207.88 | 127.22 | 80.66 |
| 18 | 1966 | 260.47 | 111.14 | 149.33 | 211.59 | 128.76 | 82.83 |
| 19 | 1967 | 264.26 | 112.29 | 151.97 | 213.14 | 129.65 | 83.49 |
| 20 | 1968 | 264.19 | 113.13 | 151.06 | 209.52 | 126.01 | 83.51 |
| 21 | 1969 | 267.58 | 113.94 | 153.64 | 209.75 | 126.19 | 83.56 |
| 22 | 1970 | 275.41 | 115.91 | 159.5 | 220.3 | 132.47 | 87.83 |
| 23 | 1971 | 281.14 | 118.27 | 162.87 | 227.61 | 137.06 | 90.55 |
| 24 | 1972 | 292.76 | 122.84 | 169.92 | 242.88 | 148.64 | 94.24 |
| 25 | 1973 | 310.63 | 129.82 | 180.81 | 264.84 | 164.35 | 100.49 |
| 26 | 1974 | 328.78 | 138.1 | 190.68 | 289.04 | 180.33 | 108.71 |
| 27 | 1975 | 347.5 | 146.17 | 201.33 | 306.04 | 191.11 | 114.93 |
| 28 | 1976 | 362.95 | 151.77 | 211.18 | 326.27 | 204.02 | 122.25 |
| 29 | 1977 | 383.27 | 161.44 | 221.83 | 344.41 | 216.04 | 128.37 |
| 30 | 1978 | 405.88 | 174.94 | 230.94 | 368.82 | 236.4 | 132.42 |
| 31 | 1979 | 422.03 | 185.25 | 236.78 | 395.01 | 262.13 | 132.88 |
| 32 | 1980 | 443.2 | 200.29 | 242.91 | 418.64 | 284.07 | 134.57 |
| 33 | 1981 | 463.36 | 217.9 | 245.46 | 442.51 | 310.11 | 132.4 |
| 34 | 1982 | 490.71 | 240.86 | 249.85 | 471.23 | 339.1 | 132.13 |
| 35 | 1983 | 516.07 | 262.21 | 253.86 | 507.15 | 373.4 | 133.75 |
| 36 | 1984 | 553.57 | 291.96 | 261.61 | 553.89 | 415.25 | 138.64 |
| 37 | 1985 | 613.44 | 336.54 | 276.91 | 625.98 | 476.11 | 149.87 |
| 38 | 1986 | 672.36 | 380.49 | 291.86 | 705.91 | 544.14 | 161.77 |
| 39 | 1987 | 773.93 | 464.5 | 309.43 | 805.72 | 628.28 | 177.44 |
| 40 | 1988 | 887.22 | 555.84 | 331.38 | 941.8 | 745.1 | 196.7 |
| 41 | 1989 | 1034.69 | 667.95 | 366.74 | 1089.33 | 868.38 | 220.95 |
| 42 | 1990 | 1231.82 | 826.05 | 405.77 | 1233.16 | 1026.1 | 205.23 |
| 43 | 1991 | 1492.18 | 1033.14 | 459.03 | 1459.18 | 1215.68 | 238.74 |
| 44 | 1992 | 1915.06 | 1355.5 | 559.56 | 1863.65 | 1544.94 | 301.02 |
| 45 | 1993 | 3040.78 | 2210.25 | 830.53 | 2631.28 | 2147.51 | 419.94 |
| 46 | 1994 | 4926.24 | 3723.39 | 1202.86 | 3958.64 | 3148.11 | 653.75 |
| 47 | 1995 | 7203.59 | 5456.35 | 1747.24 | 5762.26 | 4346.32 | 1152.06 |
| 48 | 1996 | 9291.22 | 6923.67 | 2367.56 | 7732.03 | 5537.78 | 1508.97 |
| 49 | 1997 | 11269.18 | 8406.8 | 2862.37 | 10111.12 | 6745.23 | 2042.61 |
| 50 | 1998 | 13823.66 | 9951.35 | 3872.31 | 13123.44 | 7963.29 | 2773.86 |
