TheTDS/DTR card Page245 of 544
Option11C and 11C Mini TechnicalReference Guide
Table 8 5
NTAK03, NTDK20, and NTDK97 µ-Law tones and cadence (Part1 of 6)
Tone # Frequency
(Hz)
dB below
overload
Precision
Ringing
Tones
DTMF Digits MF Digits
1350/440 -23/-23 √
2(533 + 666) x 10 -23/-23 √
3440 -23 √
4350/440 -19/-19 √
5440/480 -25/-25 √
6480 -23 √
7480/620 -30/-30 √
81020 -16 √
9600 -23 √
10 600 -16 √
11 440/480 -22/-22 √
12 350/480 -23/-23 √
13 440/620 -24/-24 √
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