Konica Minolta FK-101, Service Manual

Page: 127 / 225

7-11
A. Signal Definition
Signal
Type
Meaning
Signal Direction
Called Call
Signal
Speed
Timing of Transmission
CI
(Call Indicator) Function display on
the calling side ) L ( 1 2 V
(300bps)
Start: after 0.4 seconds after line connection from ON
condition (in the following format)
when 3 Period or more has passed after ANSam /
ANS is detected
Stop:
•
[Comments]
•
•
•
ANSam
(Modified
Answer Tone) V.8 procedure on the
called side
When 0.2 seconds or more has passed after reception
•
[Comments]
•
•
•
•
CM
(Call Menu)
Modulation mode etc.
on the calling side
(300bps)
) L ( 1 2 . V
Te (0.5 sec.
≤
Te
≤
1 sec.) has passed after CI
transmission stops
Start:
When two or more JM are detected Stop:
•
[Comments]
•
•
CJ
CM termination
(300bps)
) L ( 1 2 . V When CM is completed
•
[Comments]
•
STOP bit 7 b 6 b 5 b 4 b 3 b 2 b 1 b 0 b
0 0 0 0 0 0 0 0 0 1
JM
(Joint Menu)
Display of common
ability on both calling
and called sides
(300bps)
) H ( 1 2 . V
Start: When two or more same CM are received
When CJ is received or receives a signal matching
the selected Modulation Mode from the calling side Stop:
•
[Comments]
•
•
•
•
•
•
CI is a signal to carry Call Function.
The calling side send CI, CT (Call Tone - V25) or CNG.
CI transmission and detection are optional.
The ON minimum time (=3 Period) is of duration of three CI signals in the following format.
Essential for a called machine which supports the V8 procedure.
2100Hz sinewave is phase-inverted by 400 +/-25ms periods, then amplitude modulated by 15 +/-0.1
Hz sinewave
Average value of modulation factor (x)
0.8 +/- .01 < x < 1.2 +/- .01
Average transmission power compliant to V2
2100 +/- 200Hz external power is smaller than the average power by 24dB or more.
CM is a signal which carries Call Function, Modulation Modes, Protocols and GSTN access.
The first information category is Call Function.
Protocols and GSTN access category are added when the calling side has ability and when needed
to inform to a remote station.
START bit (0) and STOP bit (1) are added to 1 octet of all bit 0.
Signal format START bit
JM is a response signal to CM and of the same format as the received CM.
The fist information category is Call Function as same as CM.
Modulation Mode sets the common bit on calling and called sides and sends by the same octet as
received CM.
When there is no common ability, all bits are set to 0 and send by the same octet as received CM.
The minimum item No. is selected from the common bits to determine the actual Modulation Mode.
Protocol is added when it is included in received CM and needed to instruct.
GSTN access is added when it is included in received CM and needed to instruct.
Bit 6 is set to ON when needed to show ability. Bit 5 is set to the same one as received CM
ON
OFF
ON: 3period< T < 2sec
OFF: 0.4sec < T < 2sec