IP Trunk3.01 (and later) traffic engineering 99
This example is based on the G.729AB codec with 30 ms payload size and
Silence Suppression enabled. For relations of user-selectable parameters
such as payload size, codec type, packetsize and QoS, refer to "Set QoS
expectations" (page 139).
Calculate the number of IP Trunk 3.01 (and later) ports required
IP Trunk3.01 (and later) TIE trunks are provisioned based on average
busy-hour traffic tables, using the calculated amount of voice and faxtraffic
between IP Trunk3.01 (and later) nodes. Table 10 "Trunktraffic, Poisson
1 per cent blocking Grade of Service" (page 99) shows the number of
trunks required based on average busy hour CCS fora 1% blocking Grade
of Service. Table 11 "Trunktraffic Poisson 10 per cent blocking Grade of
Service" (page 100) shows the number of trunks required based on average
busy-hour CCS for a 10% blockingGrade of Service.
A lower Grade of Service, such as P.10,might be preferred if overflow
routing is available through the PSTN,circuit-switched VPN, or IP Trunk
3.01 (and later) TIE trunks.
Tabl e 10
Trunktraffic, Poisson 1 per cent blocking Grade of Service
Trunks CCS Trunks CCS Trunks CCS Trunks CCS Trunks CCS
1 0.4 21 426 41 993 61 1595 81 2215
2 5.4 22 453 42 1023 62 1626 82 2247
3 15.7 23 480 43 1052 63 1657 83 2278
4 29.6 24 507 44 1082 64 1687 84 2310
546.1 25 535 45 1112 65 1718 85 2341
6 64 26 562 46 1142 66 1749 86 2373
784 27 590 47 1171 67 1780 87 2404
8 105 28 618 48 1201 68 1811 88 2436
9 126 29 647 49 1231 69 1842 89 2467
10 149 30 675 50 1261 70 1873 90 2499
11 172 31 703 51 1291 71 1904 91 2530
12 195 32 732 52 1322 72 1935 92 2563
13 220 33 760 53 1352 73 1966 93 2594
14 244 34 789 54 1382 74 1997 94 2625
15 269 35 818 55 1412 75 2028 95 2657
16 294 36 847 56 1443 76 2059 96 2689
17 320 37 876 57 1473 77 2091 97 2721
For trunk traffic greater than 4427 CCS, allow 29.5 CCS per trunk.
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright© 2007, Nor tel Networks
.