Nortel Networks Circuit Card - Manual (Page 887)

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