US Robotics 000698-13 - Manual del propietario

Part No.1.024.1362-00

Published March1998

3COM

-MODEM

RELEASE NOTES

New Features

The following new features have been added to your

modem:

■V.90 Server Capabilities

■Selective Reject

■Disabling reset to view previous call data

■Fast Answer

■Turning off echo canceller (2100hztone)

■Microsoft Encrypted Password Authentication

■IDSL

Year 2000 Compliance

For information on Year 2000 compliance and 3Com

products, visit the 3Com Year 2000 web page:

http://www.3com.com/products/yr2000.html

New AT Commands

The following table includes a list of all AT commands

needed to use these new features. See the Command

Reference on the Connections CD-Rom for more

information regarding bit-mapped registers.

In order to Command

Enable V.90 (Default) ATS58.5=0

Disable V.90 ATS58.5=1

Disable 2100hz tone in DOV ATS69.6=1

Disable the asterick (*) key on the SLIC as a redial ATS68.5=1

23COMI-MODEMRELEASE NOTES

V.90 The

-modem now has V.90 server capabilities. By default,

V.90 is enabled on your modem.

V.90 analog clients can call into your

-modem to get V.90

connections. The analog device port is not able to act as a

V.90 server

Selective Reject

The

-modem now supports Selective Reject for analog

calls. Selective Reject improves performance on noisy lines

by reducing the amount of overhead incurred when the

protocol must resend data due to errors.

When Selective Reject is active, only the frame that

contained the error is resent, instead of the frame plus all

of the following unacknowledged frames.

Selective Reject is an optional part of the ITU-T V.42 (LAPM)

standard. By default, Selective Reject is enabled.

Disabling reset to view previous call data

If the communication software you use with your

-modem

cannot be configured to stop sending the ATZ string before

or after each connection, set your

-modem to ignore ATZ.

When the

-modem ignores ATZ, it does not clear out the

previous call statistics in the ATI6 screen.

By default, this feature is disabled.

Enable the asterick (*) key on the SLIC as a redial ATS68.5=0

Disable Selective Reject ATS51.6=1

Enable Data Over Voice ATS69.5=1

Enable Fast Answer ATS69.7=1

Ignore ATZ ATS69.2=1

In order to Command

New AT Commands 3

Fast Answer

Fast Answer saves time by forcing the

-modem to answer

calls as fast as possible without going through the Ring

Indicate toggling sequence.

By default, Fast Answer is disabled on your modem.

Turning off the echo canceller (2100hz tone)

You can now configure the

-modem so it does not send a

2100hz tone at the beginning of a call.

When Data Over Voice (DOV) is enabled, the

-modem

sends a 2100hz tone at the beginning of a 3.1khz 56 kbps

voice call to turn off the telephone company’s echo

canceller.

If there are no echo cancellers on the B-channel during the

call, disable the 2100hz tone in DOV to save 2 seconds of

connect time.

When you disable the tone, you also risk not being able to

connect to the phone number.

By default, this feature is enabled; the

-modem sends a

2100hz tone at the beginning of a DOV call.

Microsoft Encrypted Password

If the

-modem is connecting to a server that supports

Microsoft Encrypted Password Authentication, the

-modem will respond to the server using the same

protocol. However, the

-modem will communicate with

your computer using Password Authentication Protocol

(PAP).

Since your computer must communicate using PAP, the

software on your computer should not be configured to

ONLY accept Microsoft Encrypted Password.

Your modem will translate PAP into Microsoft Encryption

Password Authentication to communicate with the server.

The password will be clear-text over the serial cable

between your computer and the modem. Once the

password is on the ISDN telephone network, the password

will be encrypted.

43COMI-MODEMRELEASE NOTES

IDSL Your modem now supports 128Kbps synchronous mode.

When your modem is in this mode, it supports USWest

128K IDSL service.

IDSL mode is a leased line configuration, there is no call

setup required or supported. When the modem is turned

on and in IDSL Mode, it will attain physical layer

synchronization with the network. Data passes over both

B-Channels, to a single 128Kbps data stream. The data

stream is sent in a synchronous data format across the DTE

interface.

Once you have configured your modem for IDSL Mode, the

modem will read settings from NVRAM upon powerup.

To configure your modem for IDSL mode, enter the

following commands:

AT&F1*V2=4

ATS67=6S44=3M0&C1&D2&L1&M1&W

Your modem will respond with an "OK" message after you

enter each command.

New Connect Messages 5

New Connect Messages

The table below includes all new connect messages..

Message #Message #

28000 256 40000/ARQ/V90 287

28000/ARQ 257 33333/V90 288

28000/V90 258 33333/ARQ/V90 289

28000/ARQ/V90 259 37333/V90 290

29333 260 37333/ARQ/V90 291

29333/ARQ 261 41333/V90 292

29333/V90 262 41333/ARQ/V90 293

29333/ARQ/V90 263 42666/V90 294

30666 264 42666/ARQ/V90 295

30666/ARQ 265 44000/V90 296

30666/V90 266 44000/ARQ/V90 297

30666/ARQ/V90 267 45333/V90 298

32000 268 45333/ARQ/V90 299

32000/ARQ 269 46666/V90 300

32000/V90 270 46666/ARQ/V90 301

32000/ARQ/V90 271 48000/V90 302

34666 272 48000/ARQ/V90 303

34666/ARQ 273 49333/V90 304

34666/V90 274 49333/ARQ/V90 305

34666/ARQ/V90 275 50666/V90 306

36000 276 50666/ARQ/V90 307

36000/ARQ 277 52000/V90 308

36000/V90 278 52000/ARQ/V90 309

36000/ARQ/V90 279 53333/V90 310

38666 280 53333/ARQ/V90 311

38666/ARQ 281 54666/V90 312

38666/V90 282 54666/ARQ/V90 313

38666/ARQ/V90 283 56000/V90 314

40000 284 56000/ARQ/V90 315

40000/ARQ 285 57333/V90 316

40000/V90 286 57333/ARQ/V90 317

63COMI-MODEMRELEASE NOTES

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or

may not be registered in other countries.

3Com, BoundaryRouting, LANplex, LinkBuilder, NETBuilder, NETBuilderII, ParallelTasking, EtherDisk,

EtherLink, EtherLinkII, NetAge, SmartAgent, SuperStack, TokenDisk, TokenLink, Transcend, and

ViewBuilder are registered trademarks of 3Com Corporation. FDDILink, FMS, and NetProbe are

trademarks of 3Com Corporation. 3ComFacts is a service mark of 3Com Corporation.

Other brand and product names may be registered trademarks or trademarks of their respective

holders.

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