Nortel Networks Circuit Card 311 User Manual
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The TDS/DTR card
Tone detector
The TDS/DTR card provides eight channels of DTMF (Dual Tone
Multi-Frequency) detection in A-Law or µ-Law.
In North America, pre-programmed data is configured for µ-Law tone
detection.
SDI function
The TDS/DTR card provides two SDI (Serial Data Interface) ports.
Refer to "SDI ports" in Communication Server 1000M and Meridian 1 Large
System Planning and Engineering (NN43021-220) for more information.
Tones and cadences
The following tables give the tones and cadences provided by the NTAK03
TDS/DTR card.
Table 457
NTAK03, NTDK20, and NTDK97 Mu-Law tones and cadence
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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.