2Nd Page Transmission Termination To Communication Termination - Konica Minolta FK-502 Service Manual

FK-502 Service Manual Ver.1.0
(2-3)

2nd page transmission termination to communication termination

Source Terminal
Recipient Terminal
Note - Some terminals may disconnect the line immediately after sending DCN without sending consecutive 1s.
(3) Procedure details
(3-1) Phase 1 (V8) ....Beginning of connection between a calling modem and a called modem
1sec
Calling
Called
0.2 sec or more
(*1) One of no signals / C1 / CNG (T.30) / CT (V.25)
(*2) V.34 full-duplex ability in the Modulation Mode bit is ON.
(*3) ANSam of phase inversion is sent. Phase inversion is an option in case of supporting only
half-duplex. When CM or valid signal from the calling side is not detected, the procedure
is moved to T.30, etc. after 75 ± 5ms interval.
Control channel re-synchronization procedure
Image
Sh Sh
Data
Sh
When ANSam / ANS is detected
(CI must be sent three times or more)
0.5 sec or more
(ecno canceler is OFF.)
Te
CI,CI,CI(*1)
ANSam (*3)
5 1 sec or less
ALT
Flags
E
ALT E
Flags
Sh MCF
When JM is detected twice or more
CM,CM,CM(*2)
CJ
JM,JM,JM
When CM is detected
When CJ or Tone B is detected
twice or more
PROTOCOL
DCN "1" Line Disconnect
Line Disconnect
Flags
75 5ms
To Phase 2
To Phase 2
75 5ms
7-15