1268
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1. ?
2.
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3.? ?
4.?
5.,
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6.( )? ?
7." "? ?
8.R ,
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10." "?
11.?
12.?
47
13.?
14.?
15.?
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17.?
18.?
?
48
6.
-
»
1
.
DTMF .
.
( DTMF - Dual-Tone Multiple Frequency). -
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( , ).
. -
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. -
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— .
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16 .
- 697, 770, 852 941 , - 1209, 1336, 1477 1633 .
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0,75 , -
- 1,5 .
( ) -
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) ; ; .
49
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. 2.2. DTMF-
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(3,579545 ), -
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50