Fundamentalsof Telecommunications

64 TRANSMISSION AND SWITCHING: CORNERSTONES OF A NETWORK Table 4.2 Trunk-Loading Capacity, Based on Poisson Formula, Full Availability Grade of Service 1 in 1000 Grade of Service 1 in 100 Grade of Service 1 in 50 Grade of Service 1 in 20 Grade of Service 1 in 10 Trunks UC TU UC TU UC TU UC TU UC TU 1 0.1 0.003 0.4 0.01 0.7 0.02 1.9 0.05 3.8 0.10 2 1.6 0.05 5.4 0.15 7.9 0.20 12.9 0.35 19.1 0.55 3 6.9 0.20 16 0.45 20 0.55 29.4 0.80 39.6 1.10 4 15 0.40 30 0.85 37 1.05 49 1.35 63 1.75 5 27 0.75 46 1.30 56 1.55 71 1.95 88 2.45 6 40 1.10 64 1.80 76 2.10 94 2.60 113 3.15 7 55 1.55 84 2.35 97 2.70 118 3.25 140 3.90 8 71 1.95 105 2.90 119 3.30 143 3.95 168 4.65 9 88 2.45 126 3.50 142 3.95 169 4.70 195 5.40 10 107 2.95 149 4.15 166 4.60 195 5.40 224 6.20 11 126 3.50 172 4.80 191 5.30 222 6.15 253 7.05 12 145 4.05 195 5.40 216 6.00 249 6.90 282 7.85 13 166 4.60 220 6.10 241 6.70 277 7.70 311 8.65 14 187 5.20 244 6.80 267 7.40 305 8.45 341 9.45 15 208 5.80 269 7.45 293 8.15 333 9.25 370 10.30 16 231 6.40 294 8.15 320 8.90 362 10.05 401 11.15 17 253 7.05 320 8.90 347 9.65 390 10.85 431 11.95 18 276 7.65 346 9.60 374 10.40 419 11.65 462 12.85 19 299 8.30 373 10.35 401 11.15 448 12.45 492 13.65 20 323 8.95 399 11.10 429 11.90 477 13.25 523 14.55 21 346 9.60 426 11.85 458 12.70 507 14.10 554 15.40 22 370 10.30 453 12.60 486 13.50 536 14.90 585 16.25 23 395 10.95 480 13.35 514 14.30 566 15.70 616 17.10 24 419 11.65 507 14.10 542 15.05 596 16.55 647 17.95 25 444 12.35 535 14.85 572 15.90 626 17.40 678 18.85 26 469 13.05 562 15.60 599 16.65 656 18.20 710 19.70 27 495 13.75 590 16.40 627 17.40 686 19.05 741 20.60 28 520 14.45 618 17.15 656 18.20 717 19.90 773 21.45 29 545 15.15 647 17.95 685 19.05 747 20.75 805 22.35 30 571 15.85 675 18.75 715 19.85 778 21.60 836 23.20 31 597 16.60 703 19.55 744 20.65 809 22.45 868 24.10 32 624 17.35 732 20.35 773 21.45 840 23.35 900 25.00 33 650 18.05 760 21.10 803 22.30 871 24.20 932 25.90 34 676 18.80 789 21.90 832 23.10 902 25.05 964 26.80 35 703 19.55 818 22.70 862 23.95 933 25.90 996 27.65 36 729 20.25 847 23.55 892 24.80 964 26.80 1028 28.55 37 756 21.00 876 24.35 922 25.60 995 27.65 1060 29.45 38 783 21.75 905 25.15 951 26.40 1026 28.50 1092 30.35 39 810 22.50 935 25.95 982 27.30 1057 29.35 1125 31.25 40 837 23.25 964 26.80 1012 28.10 1088 30.20 1157 32.14 41 865 24.05 993 27.60 1042 28.95 1120 31.10 1190 33.05 42 892 24.80 1023 28.40 1072 29.80 1151 31.95 1222 33.95 43 919 25.55 1052 29.20 1103 30.65 1183 32.85 1255 34.85 44 947 26.30 1082 30.05 1133 31.45 1214 33.70 1287 35.75 45 975 27.10 1112 30.90 1164 32.35 1246 34.60 1320 36.65 46 1003 27.85 1142 31.70 1194 33.15 1277 35.45 1352 37.55 47 1030 28.60 1171 32.55 1225 34.05 1309 36.35 1385 38.45 48 1058 29.40 1201 33.35 1255 34.85 1340 37.20 1417 39.35 49 1086 30.15 1231 34.20 1286 35.70 1372 38.10 1450 40.30 50 1115 30.95 1261 35.05 1317 36.60 1403 38.95 1482 41.15