Konica Minolta FK-502 Service Manual page 142

PROTOCOL
A. Signal Definition
Signal Type Meaning
CI Function
(Call Indicator) display on
the calling
side
[Comments] • CI is a signal to carry Call Function.
ANSam V.8 proce-
(Modified dure on
Answer Tone) the called
side
[Comments] • Essential for a called machine which supports the V8 procedure.
CM Modula-
(Call Menu) tion mode
etc.
on the
calling
side
[Comments] • CM is a signal which carries Call Function, Modulation Modes, Proto-
CJ CM termi-
nation
[Comments] • START bit (0) and STOP bit (1) are added to 1 octet of all bit 0.
7-16
Signal
Signal
Direction
Speed
Call Called
→
V21(L)
(300bps)
• 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.
←
—
• 2100Hz sinewave is phase-inverted by 400 +/-25ms periods, then
amplitude modulated by 15 +/-0.1Hz 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.
V.21(L)
→
(300bps)
cols 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.
→
V.21(L)
(300bps)
• Signal format START bit b0 b1 b2 b3 b4 b5 b6 b7 STOP bit.
0
FK-502/Network Fax Service Manual Ver.3.0
Timing of Transmission
Start: after 0.4 seconds after line con-
nection from ON condition (in
the following format)
Stop: when 3 Period or more has
passed after ANSam / ANS is
detected
ON OFF
When 0.2 seconds or more has
passed after reception
Start: Te (0.5 sec. ≤ Te ≤ 1 sec.) has
passed after CI transmission
stops
Stop: When two or more JM are
detected
When CM is completed
0 0 0 0 0 0 0 0
ON: 3period< T < 2se
OFF: 0.4sec < T < 2se
1