91 lines
1.5 KiB
Plaintext
91 lines
1.5 KiB
Plaintext
|
|
||
|
|
-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-
|
||
|
|
LINE SIGNALS IN CCITT SYSTEMS
|
||
|
|
-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-=*=-
|
||
|
|
|
||
|
|
|
||
|
|
You will be given an entry followed
|
||
|
|
by 4 pieces of information on that en-
|
||
|
|
try. The titles for those 4 pieces of
|
||
|
|
information are: Direction, CCITT #3
|
||
|
|
(1VF), CCITT #4 (2VF), and CCITT #5 (2
|
||
|
|
VF). The individual pieces of infor-
|
||
|
|
mation will be, for the most part, ab-
|
||
|
|
breviated to the use of symbols, the
|
||
|
|
symbols table will follow the entries
|
||
|
|
at the end of this section.
|
||
|
|
|
||
|
|
SEIZE TERMINAL: -->,X,PX,X
|
||
|
|
|
||
|
|
SEIZE TRANSIT: -->,N/A,PY,N/A
|
||
|
|
|
||
|
|
START PULSING-TERMINAL: <--,X,X,Y
|
||
|
|
|
||
|
|
START PULSING-TRANSIT: <--,N/A,Y,N/A
|
||
|
|
|
||
|
|
END OF PULSING (ST)*: -->,250MS,xSxSxS
|
||
|
|
x,1500+1700HZ
|
||
|
|
|
||
|
|
BUSY: <--,XX,PX,Y
|
||
|
|
|
||
|
|
ACKNOWLEDGE: -->,N/A,N/A,X
|
||
|
|
|
||
|
|
ANSWER: <--,XSX,PY,X
|
||
|
|
|
||
|
|
CLEAR BACK (ON HOOK): <--,XX,PX,Y
|
||
|
|
|
||
|
|
RING FORWARD: -->,XSX,PYY,Y(850+OR-200
|
||
|
|
MS)
|
||
|
|
|
||
|
|
CLEAR FORWARD (DISCONNECT): -->,XXSXX,
|
||
|
|
PXX,X+Y
|
||
|
|
|
||
|
|
DISCONNECT ACKNOWLEDGE: <--,XXSXX,PYY,
|
||
|
|
X+
|
||
|
|
|
||
|
|
|
||
|
|
SYMBOL TABLE
|
||
|
|
|
||
|
|
X = 2280+OR-6HZ,120+OR-30MS
|
||
|
|
|
||
|
|
XX = 2280+OR-6HZ,600+OR-120MS
|
||
|
|
|
||
|
|
S=100+OR-20MS SILENCE
|
||
|
|
|
||
|
|
<-- OR --> = DIRECTION
|
||
|
|
|
||
|
|
Those were for CCITT #3 (1VF) (Second
|
||
|
|
item after each signal)
|
||
|
|
|
||
|
|
X = 2040+OR-6HZ,100+OR-20MS
|
||
|
|
|
||
|
|
Y = 2400+OR-6HZ,100+OR-20MS
|
||
|
|
|
||
|
|
XX = 350+OR-70MS
|
||
|
|
|
||
|
|
YY = 350+OR-70MS
|
||
|
|
|
||
|
|
S = 35+OR-7MS;x:2040HZ,35MS
|
||
|
|
|
||
|
|
P = (2040HZ,2400HZ),150+30MS
|
||
|
|
|
||
|
|
Those were for CCITT #4 (2VF)
|
||
|
|
|
||
|
|
X = 2400+OR-6HZ
|
||
|
|
|
||
|
|
Y = 2600+OR-6HZ
|
||
|
|
|
||
|
|
Those were for CCITT #5 (2VF)
|
||
|
|
|
||
|
|
N/A = Not Applicable
|
||
|
|
|
||
|
|
* = Combination #15 of Address Code
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
Downloaded from Strictly Business (415) 583-1673.
|
||
|
|
Press a key...
|
||
|
|
a
|