Oki OKIOFFICE44 Service Manual page 27

No.
25 Fallback
Fallback
rank
1st
2nd
3rd
4th
5th
6th
26 Protocol
27 Transmission time
28 Error correction
29 Communication mode
30 Ringing signal detection sensitivity
1) Voltage range
2) Frequency range
3) Ring response time
General Information
Table 1.5.1 (7/11) Basic Performance Specifications
Item
Automatic fallback will occur according to the following sequence
by FTT, RTN or PPR.
Transmission Activated by
speed FTT (Times)
14400 bps
12000 bps
9600 bps
7200 bps
4800 bps
2400 bps
When the last trial fails, the transmitting station sends out a DCN
signal to the remote station for disconnection.
Note:
1) ITU-T Rec. T.30
2) Oki Data special protocol
Note:
6 sec. /ITU-T No. 1 sample document
Note:
ITU-T Error correction mode (ECM)
Oki Data ITU-T ECM
Half-duplex
25 to 150 V r.m.s.
Inoperative below 10 V
20 to 68 Hz
One-ringing signal or 5 to 30 seconds.
(Selectable in 5 sec. steps. F + OT9 +
Specifications
Activated by
RTN (Times)
1 1
1 1
1
1
1 1
2 1
2 1
Continuous PPRs for the same partial page within each
fallback rank.
High-speed protocol
The T.30 protocol signal from the transmitting station is sent at
message transmission speed instead of 300 bps.
In high-speed protocol, 28.8 K-bps are not supported.
This is Phase C time at 3.85 line/mm and 14400 bps for 6
sec. in MMR code transmission.
1 - 15
Activated by
Protocol
PPR (Times)
4 (Note 1) ITU-T V.17 (V.33)
ITU-T V.17 (V.33)
4 (Note 1)
4 (Note 1) ITU-T V.17 (V.29)
ITU-T V.17 (V.29)
4 (Note 1)
4 (Note 1) ITU-T V.27 ter.
4 (Note 1) ITU-T V.27 ter.
+ 11)
OKIOFFICE 44
Service Manual, P/N 59276801