TABLE 3 - A . TDM BUS Time Slots

Time Slot No.

Function

 

00

 

 

 

 

 

thru

Control

 

 

 

04

(5)

 

 

 

 

 

 

 

 

 

 

-Tones-

 

 

 

05

Dial

Tone

 

06

Busy

Tone

 

07

Re-order

Tone

 

08

Ringback

Tone

 

09

Data-Null

 

 

 

10

Voice-Null

 

11

Music

 

 

 

12

697 Hz*

 

 

 

13

770 Hz*

 

 

 

14

852 Hz*

 

 

 

15

941 Hz*

 

 

 

16

1209 Hz*

 

 

 

17

1336 Hz*

 

 

 

18

1447 Hz*

 

 

 

19

1637 Hz*

 

 

 

 

(15)

 

 

 

 

 

 

 

 

 

 

20

Call

 

 

 

 

thru

Processing

 

254

(235)

 

 

 

 

 

 

 

 

 

2 5 5

Not Used

 

 

 

 

(1)

 

 

 

* These tones are used to generate touch-tone signals.

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Image 292
AT&T AT&T manual Time Slot No Function