Acer V.90 Manuale utente
Modem
User’s Guide
Manuel d’utilisation
Benutzerhandbuch
Mauale dell’utente
Guía del usuario
Part No.: HMU.0550.003
Doc No.: NB235-0110A
Changes may be made periodically to the information in this publication without obligation
to notify any person of such revision or changes. Such changes will be incorporated in new
editions of this manual or supplementary documents and publications. This company makes
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Copyright © 2001 Acer Incorporated.
All Rights Reserved.
Modem User’s Guide
Original Issue: September 2001
Acer and the Acer logo are registered trademarks of Acer Incorporated. Other brands and
product names are trademarks and/or registered trademarks of their respective owners.
1
Modem user’s guide
Introduction
This V.90 modem provides the highest speed access to the Internet and
online services, and especially accelerates downloading of graphics,
telegaming, and collaborative computing. It’s the highest speed
international FAX/modem available. It has worldwide homologation
support which allows you to instantly configure the modem for
telephone lines, so you don’t have to pay additional, up-front, monthly
costs for special lines.
Features
•Highest Internet connection rates, downstream speeds to 56kbps,
backward compatible with V.34 modems
•Data mode capabilities:
•ITU-T V.90 data rates: 28000bps ~ 56000bps
•Ultrahigh compression throughput due to parallel access
directly to the host PC
•ITU-T V.34 extended rates: 33600bps ~ 24000bps
•V.32terbo, V.32bis
•TIA/EIA 602 standard for AT command set
•V.42 error correction (LAPM and MNP)
•V42bis and MNP Class 5 data compression
•Fax mode capabilities:
•ITU-T V.17, V.29, V.27ter, and V.21 Channel 2 standards
•TIA/EIA 578 Class 1 FAX
•Auto-dial, call progress monitor
•Ring, line break detection
•Low Power consumption
•ITU standard V.92 software upgradeability
•Worldwide homologation support
•Software support
2
Note: Execute this program to match the country you are currently
in for the modem to function properly.
Installing and Testing the Modem
Installing and Configuring the Software
Install the communications software according to the software user’s
modem of the same COM port and IRQ line used by the modem. You
may be prompted by the software to configure certain communication
parameters. We suggest the following settings:
Testing Your Modem
In order to check if the modem is installed properly, make sure that the
COM Port and IRQ settings of the modem match the software. Type AT
on your terminal screen and press ENTER. The modem should respond
by displaying an OK (or 0). If it does not, either the modem may not
have been installed properly or the software has not been properly
configured.
Using Your Modem
The communications software included with your modem provides a
user friendly interface to access the data and fax. The modem may also
perform basic communication functions (such as dialing) via the AT
commands. Please refer to “AT Commands” on page 4 for detailed
Item Suggested Setting
Baud rate 115200 bps
Data bits 8
Parity none
Stop bit 1
Flow control Xon./Xoff
initialization string AT&F
3
descriptions. Since the communication software is designed to shield
the user from the difficult and cumbersome AT commands, we strongly
suggest that all modem operations be performed via the software.
Troubleshooting
If you encounter problems while using your modem, please read this
chapter. If you cannot resolve your difficulties after reading this
chapter, contact your dealer or vendor for assistance.
Problem Solution
Modem does not
respond to
commands
1Make sure the communications software is
configured with the correct COM port and IRQ
setting (same COM port and IRQ setting as the
modem). Your communications software will not
be able to send or receive any data if it is not
configured to match the COM and IRQ settings for
the modem.
2Make sure that your modem is initialized correctly.
Your modem may have been improperly initialized
by the software because you have selected an
incorrect modem type. You may also be prompted
to enter an initialization string by the software.
Use AT&F as your initialization string.
Modem dials but
does not connect.
1Make sure the IRQ setting is identical on both the
modem and the software.
2Make sure the phone line is working properly. A
noisy line will prevent proper modem operation.
Modem makes a
connection but no
data appears on
your screen.
1Make sure all communication parameters (baud
rate, data, stop, and parity bits) are properly
configured and are identical on both sides. Be
certain software flow control (Xon-Xoff - default)
is enabled in both the modem and the
communication software.
2Press the ENTER key several times. The remote
system may be waiting to receive your data before
it begins.
4
AT Commands
Basic AT Commands
A summary of the commands implemented by the modem are shown
in the following table labeled “AT Command Set Summary”.
Commands may be executed when the modem is in COMMAND mode.
COMMAND mode is entered upon one of the following conditions:
•After power up
•At the termination of a connection
•After the execution of a command other than dial or answer
commands (ATO or AT&T)
•Upon the receipt of the ESCAPE SEQUENCE (three consecutive
characters matching the contents of S register 2) while in online
mode
•Upon the on-to-off transition of DTR if D1, &D2, or &D3 has been
set
Modem
experiences errors
while on-line with
a remote modem.
1Make sure Call Waiting is turned off.
2Make sure to use Xon/Xoff software flow control
when transferring binary files.
Problem Solution
5
AT Commands Set Summary
Command Description Command Description
A/ Re-execute command &Dn Data terminal ready
(DTR) option
AT=X Write to Selected
S-register
&Fn Restore default
configuration
AT? Read selected
S-register
&Gn Select guard tone
A Answer &Kn Flow control
Bn CCITT/Bell mode &Mn Mode selection
Cn Carrier control
Dn Dial &Pn Pulse dialing control
En Command echo &Qn Mode selection
Hn Disconnect and hook
control
&Tn Test and diagnostics
In Modem identification &Sn Data set ready (DSR)
option
Ln Speaker volume &V Display current
configuration
Mn Speaker control &Wn Store current
configuration
On Return to on-line data
mode
&Yn Select default reset
profile
P Set pulse dialing as
the default
&Zn=x Store telephone
number
Qn Result code control %En Auto fallback/
fallforward control
Sn Access S-register \An Select maximum MNP
block size
6
T Set tone dial as the
default
\Bn Transmit break to
remote
Vn Result code form \Jn DCE rate adjustment
Wn Connect result code
control
\Kn Break control
Xn Extended result code
control
&Cn Data carrier detect
(DCD) control
Yn Long-space disconnect Zn Reset
Command Description Command Description
7
FAX Command Table
Command Function Command Function
+FCLASS=n Set service class +FTH=98 V.17 9600 bps (short
train)
+FCLASS=0 Select data mode
(Default)
+FTH=121 V.17 12000 bps (long
train)
+FCLASS=1 Select FAX Class 1 +FTH=122 V.17 12000 bps
(short train)
+FTS=n Stop transmission and
wait
+FTH=145 V.17 14400 bps (long
train)
+FRS=n Receive silence +FTH=146 V.17 14400 bps
(short train)
+FTH=n Transmit data with
HDLC framing
+FRH=n Receive data with
HDLC framing
+FTH=3 V.21 channel 2 300 bps +FRH=3 V.21 channel 2 300
bps
+FTH=24 V.27ter 2400 bps +FRH=24 V.27ter 2400 bps
+FTH=48 V.27ter 4800 bps +FRH=48 V.27ter 4800 bps
+FTH=72 V.29 7200 bps +FRH=72 V.29 7200 bps
+FTH=96 V.29 9600 bps +FRH=96 V.29 9600 bps
+FTH=73 V.17 7200 bps (long
train)
+FRH=73 V.17 7200 bps (long
train)
+FTH=74 V.17 7200 bps (short
train)
+FRH=74 V.17 7200 bps (short
train)
+FTH=97 V.17 9600 bps (long
train)
+FRH=97 V.17 9600 bps (long
train)
+FRH=98 V.17 9600 bps (short
train)
+FTM=145 V.17 14400 bps (long
train)
+FRH=121 V.17 12000 bps (long
train)
+FTM=146 V.17 14400 bps
(short train)
8
+FRH=122 V.17 12000 bps (short
train)
+FRM=n Receive raw Fax data
+FRH=145 V.17 14000 bps (long
train)
+FRM=24 V.27ter 2400 bps
+FRH=146 V.17 14000 bps (short
train)
+FRM=48 V.27ter 4800 bps
+FTM=n Transmit raw FAX
data
+FRM=72 V.29 7200 bps
+FTM=24 V.27ter 2400 bps +FRM=96 V.29 9600 bps
+FTM=48 V.27ter 4800 bps +FRM=73 V.17 7200 bps (long
train)
+FTM=72 V.29 7200 bps +FRM=74 V.17 7200 bps (short
train)
+FTM=96 V.29 9600 bps +FRM=97 V.17 9600 bps (long
train)
+FTM=73 V.17 7200 bps (long
train)
+FRM=98 V.17 9600 bps (short
train)
+FTM=74 V.17 7200 bps (short
train)
+FRM=121 V.17 12000 bps (long
train)
+FTM=97 V.17 9600 bps (long
train)
+FRM=122 V.17 12000 bps
(short train)
+FTM=98 V.17 9600 bps (short
train)
+FRM=145 V.17 14400 bps (long
train)
+FTM=121 V.17 12000 bps (long
train)
+FRM=146 V.17 14400 bps
(short train)
+FTM=122 V.17 12000 bps (short
train)
+F34=? FAX V.34 Half
Duplex
Command Function Command Function
Indice
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