Ал                       Ал
                          ом  Бл                       Ал    Ал
           млл лм Бл  ВлАллллпАл ммм  Бл мм млллмАлппплАл  Ал
          лл  А ллБл  Бл  лл  БллппплмБллппАлмммп    АлАллл
          лл А  ллБл  Бл  лл  Бл    АлБл   Алм   АмлпплАл  Ал
           пл ллп  Аллл   пллмАлпллллпБл    АлллпАлммлВАл    Ал
               Outbreak Magazine Issue #9 - Article 4 of 14
           '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'


-----------
misc. tones
aug22 02
-----------

DTMF(Hz)  (Dial Tone Multi-Frequency, played simultaneously)

digit  freq1   freq2
  1     697    1209
  2     697    1336
  3     697    1477
  4     770    1209
  5     770    1336
  6     770    1477
  7     852    1209
  8     852    1336
  9     852    1477
  0     941    1209
  *     941    1336
  #     941    1477
  A     697    1633
  B     770    1633
  C     852    1633
  D     941    1633





CPTs(Hz)  (Call Progress Tones, played simultaneously)

  tone          freq(s)       length
dial tone      350 + 440     continuous
ring back      440 + 480     ON2.0 OFF4.0
busy           480 + 620     ON.5 OFF.5
reorder (switch/trunk equip unavailable) 480Hz + 620Hz  ON.5 OFF.5
ring to phone  40v RMS (or more) @ 20Hz (sinudodial) ON2.0 OFF4.0





CCITT5(MF)(Hz) (SxS switching, played simultaneously) (aka blue box tones)

typical format:  KP + dialed digits + ST

digit    freq    freq
KP      1100    1700
KP2     1300    1700
1       700     900
2       700     1100
3       900     1100
4       700	 1300
5       900     1300
6       1100    1300
7       700     1500
8       900     1500
9	 1100    1500
0       1300    1500
ST      1500	 1700

Supervisory
prefix digit sequence    1100 + 1700Hz
end of digit sequence    1500 + 1700Hz
operator code 11          700 + 1700Hz
operator code 12          900 + 1700Hz
payphone coin control    1100 + 1700Hz




SITs(Hz) (Special Information Tones, played simultaneously)

name        desc              tone   dur     tone    dur     tone    dur
NC*    no circut found       985.2  380     1428.5  380     1776.7  380
IC     operator intercept    913.8  274     370.6   274     1776.7  380
VC     vacant circut         985.2  380     1370.6  274     1776.7  380
RO*    reorder (sys. busy)   913.8  274     1428.5  380     1776.7  380

            *Tone frequencies shown indicate conditions that are the
responsibility of the BOC intra-LATA carrier. Condotions occoring on
inter-LATA carriers generate SITs with different first and second tone
frequencies. The system treats both categories (BOC and I-LATA of SITs
identically.