Nortel Circuit Card Installation Manual page 887

Tones and cadences
Table 278
NTAK03, NTDK20, and NTDK97 µ-Law tones and cadence (Part 1 of 6)
Frequency
Tone #
1 350/440
2 (533 + 666) x 10
3
4 350/440
5 440/480
6
7 480/620
8 1020
9
10
11 440/480
12 350/480
13 440/620
14 940/1630
15 700/1210
16 700/1340
17 700/1480
18 770/1210
The following tables give the tones and cadences provided by the NTAK03
TDS/DTR card.
dB below
(Hz) overload
-23/-23
-23/-23
440
-19/-19
-25/-25
480
-30/-30
600
600
-22/-22
-23/-23
-24/-24
-12/-10
-12/-10
-12/-10
-12/-10
-12/-10
The TDS/DTR card
Precision
Ringing
Tones
÷
÷
-23 ÷
÷
÷
-23 ÷
÷
-16 ÷
-23 ÷
-16 ÷
÷
÷
÷
Circuit Card
Page 887 of 906
DTMF
Digits MF Digits
P
1
2
3
4
Description and Installation