Brother International DCP1000 Service Manual - Page 166

transmission speed

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Selector No. 1 3 4 6 7 8 WSW19 (Transmission speed setting in V. 17 mode) Function First transmission speed choice for fallback Last transmission speed choice for fallback V. 34 mode V. 17 mode Setting and Specifications No. 1 2 3 No. 4 5 6 000 : 001 : 010 : 011 : 100 : 101 : 110 : 111 : 0: Permitted 2,400 bps 4,800 bps 7,200 bps 9,600 bps 12,000 bps 14,400 bps 1: Prohibited 0: Permitted 1: Prohibited NOTE: For the transmission speed setting in V.34 mode, refer to WSW39. • Selectors 1 through 6: First and last choices of transmission speed for fallback These selectors are used to set the modem speed range. With the first transmission speed choice specified by selectors 1 through 3, the equipment attempts to establish the transmission link via the modem. If the establishment fails, the equipment automatically steps down to the next highest speed and attempts to establish the transmission link again. The equipment repeats this sequence while stepping down the transmission speed to the last choice specified by selectors 4 through 6. If the modem always falls back to a low transmission speed (e.g., 4,800 bps), set the first transmission speed choice to the lower one (e.g., modify it from 12,000 bps to 7,200 bps) in order to deactivate the high-speed modem function and reduce the training time for shorter transmission time. Generally, to save the transmission time, set the last transmission speed choice to a higher one. • Selector 7: V. 34 mode This selector determines whether or not the equipment communicates with the remote station in the V. 34 mode when that station supports the V. 34 mode. 23

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WSW19
(Transmission
speed
setting
in
V.
17
mode)
Selector
No.
Function
Setting
and
Specifications
No.
1
2
3
1
No.
4
5
6
First
transmission
speed
choice
for
fallback
0
0
0
:
2,400
bps
3
0
0
1
:
4,800
bps
0
1
0
:
7,200
bps
0
1
1
:
9,600
bps
4
Last
transmission speed
choice
for
fallback
1
1
0
0
0
1
:
:
12,000
bps
6
1
1
0
:
14,400
bps
1
1
1
:
7
V.
34
mode
0:
Permitted
1:
Prohibited
8
V.
17
mode
0:
Permitted
1:
Prohibited
NOTE:
For
the
transmission
speed
setting
in
V.34
mode,
refer
to
WSW39.
•
Selectors
1
through
6:
First
and
last
choices
of
transmission
speed
for
fallback
These
selectors
are
used
to
set
the
modem
speed
range.
With
the
first
transmission
speed
choice
specified
by
selectors
1
through
3,
the
equipment
attempts
to
establish
the
transmission
link
via
the
modem.
If
the
establishment
fails,
the
equipment
automatically
steps
down
to
the
next
highest
speed
and
attempts
to
establish
the
transmission
link
again.
The
equipment
repeats
this
sequence
while
stepping
down
the
transmission
speed
to
the
last
choice
specified
by
selectors
4
through
6.
If
the
modem
always
falls
back
to
a
low
transmission
speed
(e.g.,
4,800
bps),
set
the
first
transmission
speed
choice
to
the
lower
one
(e.g.,
modify
it
from
12,000
bps
to
7,200
bps)
in
order
to
deactivate
the
high-speed modem
function
and
reduce
the
training
time
for
shorter
transmission
time.
Generally,
to
save
the
transmission
time,
set
the
last
transmission speed
choice
to
a
higher
one.
•
Selector
7:
V.
34
mode
This
selector
determines
whether
or
not
the
equipment
communicates
with
the
remote
station
in
the
V.
34
mode
when
that
station
supports
the
V.
34
mode.
23