Msg: 5993 *Conference*

08-28-95 15:54:02

From: RON WIESEN

To : COMET _

Subj: REPLY TO MSG #5987 (DMTF)

In case you need basic info on the Dual-Tone Multi-Frequency (DTMF) Signaling
Code, here it is.
 
| Numeral |                   Frequency in Hertz                  
|         | 0697 | 0770 | 0852 | 0941 | 1209 | 1336 | 1477 | 1633*
+---------+------+------+------+------+------+------+------+------
|    0    |      |      |      |  X   |  X   |      |      |      
+---------+------+------+------+------+------+------+------+------
|    1    |  X   |      |      |      |  X   |      |      |      
+---------+------+------+------+------+------+------+------+------
|    2    |  X   |      |      |      |      |  X   |      |      
+---------+------+------+------+------+------+------+------+------
|    3    |  X   |      |      |      |      |      |  X   |      
+---------+------+------+------+------+------+------+------+------
|    4    |      |  X   |      |      |  X   |      |      |      
+---------+------+------+------+------+------+------+------+------
|    5    |      |  X   |      |      |      |  X   |      |      
+---------+------+------+------+------+------+------+------+------
|    6    |      |  X   |      |      |      |      |  X   |      
+---------+------+------+------+------+------+------+------+------
|    7    |      |      |  X   |      |  X   |      |      |      
+---------+------+------+------+------+------+------+------+------
|    8    |      |      |  X   |      |      |  X   |      |      
+---------+------+------+------+------+------+------+------+------
|    9    |      |      |  X   |      |      |      |  X   |      
 
  * 1633 Hertz is used in combination with the other seven      
    frequencies for special-category signals.