Ap~tld jces 425

A.4.2 Erlang C Table

The table gives the o ffered traffic load A in Edongs corresponding to lhe number of Iraffi c
channe ls C in a lrunk (column I) and C3.11 queuin g probabililY PQ in percentage (lOp row).

Channels Delay Probability. PQ

c O.~':f, 1'1> ",.
0.00 om 0.02 om 0.02 0 .03 0'" 0.., 0 .10 O. I ~ 000
0.10 O. I ~ 0.18 0.21 0.24 0.16 0.4 1 0." 0.74
OJ) 0.4) 050 05S 0.60 0.65
0.>0
0.79 0." '"
,." ,...
L.. 1.23 L )9

•, 0.66
1.07
0.81
I .~
0.91
1...19
0.99
150
1.06
1.59
1.12
1.66
1J2
1.91
1.47
2.31 2.6 1
2.10
2.8S

,• ""
.... ....
I.~~ 1.76 1.92 2.~ 2. IS 2.24 2.53 2.7S 3.01 J.>o 3.62
2,0 1 2.30 2.49 2.6.\ 2.7S 2.86 3. 19 ).4) 3.73 4.10 4.41

9
• 2.S4
3. 10
2.87
3.46
3.08
).70
3.25
3.88
J.)8
4.Q.l
3.S(!
4. 17
3.87
4S7
4. 14
4.87 S.22 5.67
S.2 1
6.OJ

" ).68 4.08 4.34 4.54 4,11 4, 85 ~.29 S.61 '.99 6.47 6.8S
4.28 4.71 S.OO S.21 S.39 SSS
.,.
6.02 ." '" ."
.-"
"""
U"
4.90
S.53
6.17
B6
6.03
6.71
S.67
6')S
S.90
6.60
7.) 1
6.09
6.8 1
7.53
6.26
6.98
7.71 8.27
...
'" .... '3'
, 7.1.1
."
7.~S

9. 16
8. 10
8.93
9.76 10.2

""
1.~
6.&.1 7.39 1.76 8.Q.l S.26 1.46 9." 9.41 9.97 10.6 I Ll

"" s.n ,.,

...
1.50 8.(19 ,""S 9.00 9.21 9.82 10.8 1l.4 12.0
8.18 8.80 9.20 9.5 1 9.7S 9.91 10.6 11. 1 11.6 ,,-' 12.8
8.87 952 9.94 10hl 10.5 10.7 11.-1 11.9 12.4 13.1 13.7

"" 957
10.)
10.2
11.0
10.7
IIA
11.0
II.S
11.3
12.0
11.5
12.)
122
13.0
12.7
I3.S
13.3
14.1 14.9
14.6
OS,
"'"22
.
11 .0 11.7 ]2.2 125 12.8 13.1 13.8 143 15.0 IS.7 "3
11.7 125 12.9 In 13.6 13.9 14.6 IS .2 IS.8 16.6 11.1
2J 12.4 1).2 13.7 14.1 14.4 14.6
,,
IS.4 16.0 16.7
'" 18.1

"" 13.2 14.0 14.S 14.9 15.2 1M 16.8 I1.S "3 19.0

,. 13.9
14.6
14.7
IS5
IS.2
16.0
IS.6
16.4
16.0
16.S
16.2
17.1
17.1
17.9
11.7
II.S
18.4
19.2
19.2
::0.1
19.9
2'0.8
" IS.4 16J 16.8 11.2 17.6 17.9 18.7 19A
::!o.2
"'. , ~ I .o
21.9
21.7

"'.•
16.1 11.0 17.6 IS.O 18.4 18.7 19.6 ::0.9 22.6

""30 16.9
11.1
11.8
18.6
18.4
19.2
18.8
19.6
192
::0.0
19.5
::0,) 21.2
21.1
21.9
2 1.8
22.7
22.8
2.\.6 '"
24.4
18.4 19.-1 W.O ::!O.4 ::!O.I 2 1.1 22.1 22.8 2.3.6 "3
"" 19.~ W.2 20.8 21.3 21.6 2!.0 22.9 !..1.6 :!4.4 '"
2.S.4 26.2

"""
W.O
W .1
21.0
21.7
21.6
22.4
22.1
22.9
22.S
2.1.3
22.8
2.1.6
".
24.6 '"
25.4
2.!'i.)
26.2
'63
~7.2
21. 1
28.0

,. 215
22.)
2~5

!.1.3
23.2
24.0
:!.l.7
24.S
24.1
~.9
24.5
2S.3
'"
26.3
26.2
27.1
27.1
27.9
28.1
29.0
28.9
29.8

"
)8
23. 1
23.9
24.2
25.0
24.8
25.7
25.4
~. 2
2S.8
26.6
26. 1
27.0
27.2
28.0 "29.7..
" .0 28.8
29.1 ".•
29.9 30.7
~ 1 .7

.,'" ~.6 25.8 ::!6..'l 27.0 21.4 27.8 28.9 30.6 JJ.7 32.6

.. 25.4
~.~
26.6
21.4
21,)
21. 1
21.8
28.7
28.3
29.1
28.7
29.5
29.S
30.'
30.'
)1.4
)I.S
)2.4
32.6
HS
""3.. ,.,
'"..
""3
...,
42 21.0 28.2 29.0 295 JO.O 32.) )J.)
.lO')
'"
.."
'J 27.1 29.0 29.8 JO.) JO.S 3 1.2 32.4 )).2 34. 1
28.6
29.4
29.8
30.7
30.6
31.4
31.2
32.0
3 1.1
32.S
32.1
)2.9
3).2
.W.l
".,
".0
~.O
35.9
36.2
)1.1
37..2
38.1

,., ,., " .• "'.0 .,.•

,,.
...
30.2 315 3D 32.9 3).4 )).S )S.O )S.8
J6.' "'.0 38.1
3 1.1 32,) )). 1 B.7 34.2 .W.6 )7.7 39.9

,... .,"'.,.• .,.

3 1.9 33.1 34.0 34.6 3S.1 )5.5 )7.6 39.9

"so n.1 34.0 34.8 3M 3S.9 J6_' 31.6".,

33.5 34.8 3S.6 36.3 36.8 37.2
'" 4 1.7 4 2.7
426 Digital Mobile C Ql1IlnulficlUiOlIS alld till' TETRA Systt m

Erlang C Table (continued from page 425)

Channels Delay Probabilily. Po

c 2.Yl- 15'.l

"" .'I.i ..\ 15.() 36..'> '7. 1 .17 .6 .18.1 40 ..1 ·H ..1 4.1.6

....
.15.1 .\7..\ \8 ,0 ,OS .18.'1 4 1.! 4~.1 ~,

"" "" ..••

........
J7-' 1II.3 .W.8 42.0 JJ. I
"'.•
J5.Q .".~ ~8.' ."
\8 .1 30' "'.7 "'.7 4:'9
",
40~ ~

"S6 \7 .6 79.' ." ." 43 .8 ~ 47~1

.• ...,
......, .,7
\8 .4 " .7 41 .4 41.9 42.4 4.\.11 ~ .7 4~.1I 47.1 4S.1

" .W.~ 4 1.6 J2 ,! 42.8 4.\ ..1 ~ 45.6 " .7 "., 49.:

"" 4 1.5 42.4

..••
J.\. I 4.1.7 ~. , ." 017.6 49.0
SO.,
SO,

...
4~." 4.1..\ ~ ~, 45.0 46A 47A 48.5 51.0
00 41.7 43.!
.• ~. , ~ 45 .4 45.9 4 7~1 48 . .1 49.5 SO. 51.0

""
...
4~.6 ~ 4.'>.0 4S.7 " .J ".7 48.~ 4'1.2 SO.. 5 1.8 52.9

..
63

65
4.\.4
.....
4S .1
4S .'1

" .7
~
....
.....11
45 .7

."
,,-'
JS.8
".7
.....
47.6

J9~'
47.4

.." .
J8 ..1

SO.,
, ".•
47.1

"'
49.8
SO.,
47.6
...
SO..
5 1.1
49.1
SO.,
SO.,
SI.1
52.6
SO. ,
5 1.0
5 1.9
5:"
SJ.7
SLl

".•
5.1. 1

".•
"",.• "S6.'.
51.'
5M

S6.'
5.'.S

55.7

57.6

""
68
J7.6
4SA
411. ~
SO.,
5().~

.'> 1.0
SO.,
5 1.8
St.S
52.J
5~ .0
52.'1 ". '"
5J3
S5.5
55.8
".7
5n
58 ..1
SO,
59.4
50.11 51.9 SH 55..\ 56 ... 57.7 59.2
"'ro JQ ..\
"'. ,
5~.b 5.1.~ ."

,... ",SH ".7

SI.7 S~.8 56.2 57 ..\ 58.6 60 ' 6U

" "'".•, 60.'

SO., S!.O 59.5 6 1.0
",
5.\.6 55.0 55.s SII.! 6!.~
5 1.8 5.U 55 ..1 55.9 S6.'
". ", 60.. 6:.0
...,
""
6.1 . ~
,,-' "'. "'. "'.
... .., ....
5~.0 55A 6U
"" ",
S7~\ ~.9
£ .:
."
5.\3 56.: H .O 57.7 58.! 6.'-& M.'
"" ~ ..\
SS.~
S6.' 57.1 H.II 5'1.1 6 1.9 6.1.2
''''
"'.•
,."
...
55.! 50.9 511.0 58.8 59'" 6~ . 8 ." M.'
TI S6.0 57.8 58.8 "'.7 60 ..\ 60.' 6!3 6.\.7 6.~.0
""
"., 67.9
56.9
57.7
58.6
"', ",
59.7
60.
60.5 6 1 .~ 6 1.7
6! .6
6.1A

".' 655
M.9
".R
67.6
"'.
....
6 1A 62.1 68.'
'""" 60.' £ ..1 6S.2
" .. "'.
....
511.0 63' .U 67.8 70.7

"'. ... .,.

""'
...'.'
60.'
6 1.2
6~. 1
...,
62.,\
6.1 . ~
.. ,,
63.2 6.1.9
6"-1 M .'
"'-, 67~1

...68.:,
68.7 ro.'
11.3
7 1.6
72.6

,.,
........
61 .1 6.\.0 M.' 66. ~ 67.9 10.' 72.2 7.\.s
£ .0 6.1.S
".7
MO 65.'
66.7 ."
67.4
67.1 68.'
"'7
10.0 7IA
n.4
73. 1
74. 1

.....,
6~ .9 M.' 7 1.0 75.4
" ro.,
" 6J.7
6-1.6
M.'
66A
66.7
67.6
67.6
68.S
68 ..\
6\1.2 "ro.7.• ",
7 1.9
7:. 8
7.\..1
74.2
75.0
76,0
76~\

".,"" "70....\
773
6.~~~ 6L\ ro , 7:A 7.\.7 75.1 76.9 78 . ~

"'-.' 68.2 7 1.0 7 1.6 73A 74.6 76.1 71.&

...,
'N.:
67.!
'". ro.. 7 1. 1 7 1.9 ", 74~\ 7" no 78.'

"" ..•• "10. 71.1 no 71.11 73.4

,., '"
7S.!
". "'.,
n.' "'.7 81.1

""'J r-.O n9 73.6 n.

"'.•
81.0
., "'ro.'.•
74 ~\
71.7 n.Q 7.\.' 74.5 7.'>.! 7,. 78 ~\ 81.6 8.1.0

•., n6 n.s no
... , >"
" .•
79.2
",
74.7 75.4 76.1 8:.5 8.1.9

.,
% nA
7.\3
'43
74.1

,.,
75.6
7S.6
76. ~
76 ..\
77.2
77.0
77.'1
78.8

""
W.
8 1.0
81.6
82.~ ....
8.1.4
85.'

.... ...OS....
""'8O'..•
77.4 82.() 8.1.5 85 .)
",
7.\.~ 75 . ~ 78.1 78.8 116.7
.," 74.1 76. 1 773 78..1 "'.7 8!.9 so.) 87.7

."
75.0 77.0 78.~ 79. ~ .!.S &.\.8 87.! 88.'
'00 75.8 no "'., 8O.' 83.4 "'7 86..1 88. 1
'"