Black Box 32144, Руководство пользователя

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100
MODEM 32144
Result codes 0-4 comprise the
basic result code set: OK,
CONNECT, RING, NO CARRIER,
and ERROR. Codes 5-43 provide
additional response information, as
explained in
Table 5-2 . Various
combinations of these codes can be
enabled or disabled by using the X
command and its four parameters,
as explained later under X—
SELECT RESULT CODE.
NOTE
With the default Hayes mode
settings in effect, the
modem transmits result
codes to the DTE. In some
installations, this may cause
undesirable interaction with
the attached DTE. If such
interaction occurs, result
codes for incoming calls
should be suppressed
(using the command AT Q2).
5.3 Transmission Speed
This section applies only to
connections made without error
correction or buffering (V.42/V.42
bis, MNP and Buffer Mode
options).
Transmission speed is governed
by the speed of the system with
which you wish to communicate.
You must set the transmission
speed of your computer by setting a
switch in the hardware or by issuing
a software command. (Refer to
your computer documentation.)
When the modem originates a call,
it automatically detects and adjusts
to the transmission speed set when
the communication port was
initialized.
When answering a call, the
modem determines the
transmission speed from the carrier
signal of the originating modem.
Change the speed (baud) setting
of your equipment to match that of
the remote system. Otherwise,
unintelligible data will appear on
your screen. (Depending on the
parameter used with the X
command, the speed will be
indicated by the CONNECT
response code.)
Autobaud
When a call is originated in Hayes
mode, the AT attention code
causes the modem to autobaud.
The speed at which the modem
autobauds defines the speed limit
for subsequent connections and
overrides any front panel Speed
Limit or DTE Speed settings. If the
unit is not autobauded, the default
interface rate is 38,400 bps.
NOTE
If AT is entered at one speed
and followed by a carriage
return [CR] at another
speed, the modem will not
recognize any further
commands until a [CR] is
entered at the same speed
of the AT.