Nortel Circuit Card Installation Manual page 889

Table 278
NTAK03, NTDK20, and NTDK97 µ-Law tones and cadence (Part 3 of 6)
Frequency
Tone #
39 770/1210
40 770/1340
41 770/1480
42 850/1210
43 850/1340
44 850/1480
45 940/1340
46 940/1210
47 940/1480
48 700/1630
49 770/1630
50 850/1630
51 reserved
52 reserved
53 1300/1500
54 700/900
55 700/1100
56 900/1100
57 700/1300
58 900/1300
59 1100/1300
dB below
(Hz) overload
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-17/-15
-13/-13
-13/-13
-13/-13
-13/-13
-13/-13
-13/-13
-13/-13
The TDS/DTR card
Precision
Ringing DTMF
Tones Digits
4
5
6
7
8
9
0
*
#
Fo
F
I
Circuit Card Description and Installation
Page 889 of 906
MF Digits
0
1
2/CC
3
4
5
6