
TABLE 3 - A . TDM BUS Time Slots
Time Slot No. | Function | 
  | 00  | 
  | 
  | 
  | 
  | 
  | thru  | Control  | 
  | 
  | |
  | 04  | (5)  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | |
  | 
  | 
  | 
  | ||
  | 05  | Dial  | Tone  | ||
  | 06  | Busy  | Tone  | ||
  | 07  | Tone  | |||
  | 08  | Ringback  | Tone  | ||
  | 09  | 
  | 
  | ||
  | 10  | ||||
  | 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 
3 - 8