411 Digilal Mobi/~ Commulljcatio" s and the TETRA System

A.3.2 Erlang B Table

The table gives the offered traffic load A in Erlangs corresponding to the number of traffic
channels C in a trunk (column I ) and call blocking probability PB in percentage (top row).

Channels Blocking ProbabililY, PB

c OSI. I<;f,
",.
m.
l S I>

,
•S
0.01
0.1 I
OJS
0.70
0 .01
O. IS
0.46
0.B7
om
0.19
0""
0."
om
0.22
, .
0.03
0.25

,.,.".. ,."
0."'
1.111
0.Q3
0.28
0.12
1.26
0."
0 .38
0 .90
1.S2
0.47
U.
us
,.so
0 .11
0."'
1.27
2.05
0.18
0."
L",
,.so
0.2S
' 00
1.93
2.95
I,n 1.36 1.S2 ' .S8 2.22 ! .88 3AS 4.01

• 1.62 1.9 1 2.11 2.28 2.42 '-" 2.96 '.J<l 3.76 'M
S."
S. II
7

••
2. 16
2.73
2.50
3.U
1.74
l A.'"
.'" S.'" .,.
3. 10
l .82
3.2S
..s.n"
3.74 4.14
s.oo
4.67
S."' ..so
6.23
7.37

.. l ."
J.63

•.'" ."
3.33 ) .78 4.34 4.75 S.S8 6.SS 1$S 8.52

.,.
) .96 4.46 4.81 S.l.! S.S3 6.11 6.78 7S 1 8.62

" 4.6 1
S.28
S.16
HB
S,.
6.29
S."
6.6 1 •."
6.10 ' .H
H4
7.,"
,."
7.'"
B.61
8.49
9 .47 10.8
10.9
12.0
"03 S.96 6.6 1 7.I1S 7." 7.70
•..,
7m 8.&.1 ,OS 11 .9 D .l
6.66 7JS 7.82 • .20 832 9 .73 ,OS "S 13.0 14.4

"" 1.33 8. 11 B.61 9 .01 'JS ' .M 10.6 11.4 12.5 14.1 IS.6

,.,
..
11.10 8.118 9.04 1 9 .83 10.2 JO.S "S 12.4 03S is ..! 16.B
"" 8.8l 9.65 10.2 10.7 11 .0 11.4 11.5 13.4 16.3 18.0

.,""
9.S8
10.)
104
11 .2 '"
11 .8
I I.~
12.3
11.9
12.7
12.2
!J. I
1).4
'U
14.3
15.3 ,
IS.S 17.4
18S
19.2
20.4
11.1 12.0 12.7 1}.2 1M .4.0 IS.! 16.3 17.6 19.6 2 1.6
11 .9 12.8 03 S 14.0 "S 14.9 16.2 "3 IB.7 22.8

""
~. 8
12.6 n .7 14.3 14.9 IS.4 15.11 17.1 18.1 19.7 21.9 24. '
13 n .4 14.5 IS .2 IH 16.2 16.7 18.' 192 20.7 no 2S.l
14.2 1s.J 16.0 16.6 17. 1 17.6 19.0 20.2 11.8 24.2 26.S
"" IS.O 16.1 16.9 , 1$ IB.O ".S 20.0 21.2 22.8 2S_' 27.7

" IH
16.6
17.0
11.11
17.8
18.6
18.04
19.3
".9
19.8
19.4
2Q.l
20.9
2 1.9
22.1
23.2
2.1.9
24.9
26.4 28.9

"'" 17.04 18.6 ,OS 20.2 20.7 2 1.2 22.9 24 ..! 16.0
~7 .6
28.7
XI.2
3 1.4
" IB.2 19.5 "'., 21.0 11.6 21.' :!.3.8 25.2 27. 1 29.9 32.6
JO 19.0 20J 2 1.2 21.9 = 2..1 . 1 24.8 26.2 "., 11.0 3J.8

" 19.9
20.7
21.2
22.0
22.1
HO
22.8
2).7
23A
24.4
24.0
14.9
2H
26.7
27.2
28.2
29.2 32. '
n .3
35.1

"
13 21.5 22 .9 23.9 24.6 2S.3 2H 27.7 ,OJ
JO. ~
3U "A
36'
J7S

"
JS
22.)
2J.2
23.11
24.6
24.11
2S.6
"S
,.A
16.2
27.1
16.11
27.7
18.7
29.7
"'0
31.3
32,4
3JA
3M
36.7
JU
"'.0
36 24.0 25.S 26.5 27.3 28.0 28.6 "'.7 32.3 34.5 37.9 4 1.2
J7 24.8 26.4 27.4 28.3 29.0 29.6 31.6 .n .J J5.6 )9.0 42.4
J8 2S.7 HJ 28.3 29.2
J<U
29.9 "'S
,<S
J2.6 .\4.4
"" 40.2 43.7

". "" ""'..•

26.S 28.1 29.2 JO.' )3.6 3H 37.7 41.3 44.9
"'"
""
.."
21.4
28.2
29.1
29.0
29.9
30.8
.1<7.1
l l .O
l l .9
31.0
31.9
32.8
31.7

".• ".,
32.7
13.'
31.4

, ....
)3.4

"S
3S.6
'M ..
37.4
42.5
43.6
+U
".,
.....
47.4

" 29.9
)(1.8
31.7
n.s
3 1.7
)2.5
33.4
32.8
33.7
34.6
m
" .7
35.6
3S.S
36.'
"S
3s.J
"S
36.2
37.1
37.6
38.6
39.6 4U ..
4!.0
·1.1. 1
'
4S.9
47.1
48.2
49.9
S I.I
S2.3

"so..•• ".•
.."""
so
33.4
34.2
n .l
36.0
M .3
3S.2
36.1
37.0
l1.9
35.6
lOS
37.4
380
,,~
36.S
37.S
"A
"0
"0
40.2
" .l
37.4
".,
J8J
"'.0
4 1.0
41.1
,,,
38. 1

4 1.9
41 .5
41.5

~S
....
42.6
43 .6

45 .7
" .7
45.1

.".,.•
<6.,
47,4 S I.?
S2.9
Sl.O
53.6

,.0
S7J
,"S
 Appclldius ..J.23

Erlang B Table (continued fro m page 422)

Channels Blocking ProbabililY. p.

c

"" ...
0 .5'1

.111.8
"'.,
.....
1.5<:<-

40,1 4U 42. 1 41.9

....,
45.S
or.
50.' S5.2 59'

.50' ..
n.7 4 1.0 4 2.1 43.0 43.9 51.7 .56..1 6 1.0

" ",
38.6 4 ~ .0 43.1 44.0 44.8 m
",,
52.8 ~7.5
".,
6~ , 2

"" ....,
4 1.5
4!.4
4~.9
4.1.& .• .....
" .0
~
~.
45,11
45.8
~,
53.9
~S.O
"
6J.S
,
"" 41.1 45.9 47.7 61.0 M.9
~ ,
41.~
42.1 44.2
.....
45.1 41.8 ""
57.1
'" 67.2

"., "'.•
~ I ..'i

"" H.O 45.1

,,,
~.
47.8 '"
4Q.6 52.6 58.2 6n 68.,
..... "'.,
" .•
43.9 .... 0 49.7 50' 59. .1 64.5
"'., "'66.'.• ""
~1.6
44.8 ,g., 49.6 50.' 5 1.6
'"
.....
....
45.6 479 41i.4 50.' .0> 12. 1
SO,
~ 1 .6 ~1 , 5 ~S.6
"" ~5 SO.3 51.6 5.1.5 56. 62.6 68.0 73.4
47.4
,,-' "., 5 1.~ 52.5 U.5 :\4.5
".
57.6
"'.•
6.l.1 "'"'-,. , 14.6
50.' r.~
,..,
51.4 SH SS.4
5'"
75,Q

."
49.1 m ~5 ~ 59.6 M.' 1 1.4 n'
"
...,
~l.I

66

""
50. '
~I.O
R9
~2.4
53.4
\4 ..1
".0
55.0
~S9
5Ll

57.1
'"
57.4
~8, I
574

""
~9.1
"'. ...""
61.6
626
6.'-1 66.'
68.0
12.6
73.8

'"
78 ..1
"'.•
8O •
'" 55,2
...,
6J.7 66.4

....".•
5~.8 56' 58.1 59~1 60.3 70.1 76.1 8~.1
5.l.? 60.1 61.3 675 7U n.,l S.Ll
'" '" ~7.8
'" n."
"'68'.•
711-1

.... "'.•
~7.0 ~8.7 60.' 61.~ 6~ .3 6>.1
,."" '"
m
';6.4
".0 511.7 6 1.0
".
..., ...,
6.1.2 66.7
"'.
7J.5
74.6 .,.
19.'
".0

...
60.0 6.1.2 64.1 67.7

"n
"19
"
"
5Ll
"2
"'.,
60.0
"'.•
..
'"
60.'
"
61 .6
6.1.5
., ""
6 1.6
62.5
6.1.4

65 ,3
"-.
....
M.'
66.'
M'
66.'
670
680
w.o
65 .2

67.2
68.0
"'.,
.'-'
"'.1
"'.•
7U!
12.&
71.7
12.7
1.'.8
748
7S.1l
75.6
76.7
".
78.9
80.0
8 1.9
831
84~
85.1
.66
lIS.]
89.'
90.'
91.0
9.1.3

., 6 1.8
".
66.1 61.7
.."'".• "" 7.l.& 76.11 8 1.1 81.7

'"
.
~ .'\

".,
.......,
61.7 67.1 "'0 71.1 74 .8 78.0 82.2

"'., .....
..
".0
"""'. , "'.•
6.1.6 66 ..1 68.1 "'.9 12.1 75.8 "'.0 8JJ 90'
"" M.'
67.2
68.2 7 1.6
7111
7!.1l
73.0
74.0
76.9
n.' ."
91.~
91,4
911.1
W.,
"" ".
."
81.1

85 672 """'.0 7 1.0

7 1.9
12.5
7.1.5
7.l.8
74.8 ,
7S.0
19.'
8~.!
&.1.2
.6.6
87.7
9.16 100.7

M.' "'.• 12.11 ", 75.8 no "'.9 84..1 88-8

'"
".
1 0~.0

10.1.1
"'0 7 1.9 73.& 15.4 76.8 ".0 &1.0 85 ..1 89.9 117. 1 lOB
n.8
'" 86.,
.,..
...".,
W.• 77.7 78.9 OJ.O 98.2 IOS.7
"''" "'. 14.&
".,
IlL O

".
75.1 nJ "0 81.4 91. 1 106.9
"',
73.7 19.'

..'" n.7 71.8 74.7

156
76.7
no
"19.'.•
,,-' ",.,
19.' W .•
&1.9
85.0
"-,
IlU
~.2
,,-'
100.6
101.7
108.2
109 ..1

... "'..
7M 90' 110.7
", "'2 101.9
"••• n,
'" &1.6 &1.9

.," "A "'.,

8 1.1
.....
81.6 &.1.9 88. ' 9 1.6 IOU 111 .9

".
75.4 89.'

.."
8~.1 8.1,6 91.7 ~75 IQ.D I 1 3.~
"'.,
".
76.3 19., 8 1.5 83. 1 917 08.' 106 .1 114 '*
77.1 SO,3 82,4 "., .., 85.5 86.8 11 1. 1 W., 107 ,6 I IS.7

.,"
OXl
78.1
19,
".0
W .•
& I.~
82.2
OJ.'
".,
&.lA
8·0
&5.3
86.1
8H
86.0
87.0
".0
.., ".."

", "'.•
87.8

89.'
112.2
113.2
94.1
~.2
95.8
96.9
97,9
"'.0
100.8
101 .9
10.1,0
104.1
108.8
109,9
111.1
111. .1
116.9
I t8.~
J ill ...
110.6