3Com DIGITAL MODEM manual Rate, Results of commands, Insufficient, Returns a value that indicates

Page 49

AT Command Set for Internal Analog Fax Modem B-5

Table B-2 AT Command Set Summary for the Internal Analog Modem (continued)

Command

Function (Example)

Description

 

 

 

X

Select the subset of result

0 — Basic call progress

 

messages that will be used by

1

— Basic call progress and connection

 

the modem to inform the PC of

 

rate

 

the results of commands

 

2

— Basic call progress and connection

 

 

 

 

rate

 

 

3

— Basic call progress and connection

 

 

rate

 

 

4

— All call progress and connection rate

%E

Line quality monitor control

0 — Disable

 

 

1

— Enable and retrain

 

 

2

— Enable and fallback/forward

 

 

3 — Enable and auto-retrain but hang up

 

 

immediately if line quality becomes

 

 

insufficient

%L

Return received line signal level

Returns a value that indicates the

 

 

received line signal level

%Q

Report line signal quality

Reports the line signal quality

&G

Generate guard tone

0 — Disable (default)

 

 

1

— Select 1800 Hz guard tone

&V

Display current configuration

 

 

\A

Set MNP max block size

0 — 64

 

 

1

— 128

 

 

2

— 192

 

 

3

— 256

\B

Transmit break to remote

Sends break to remote modem with a

 

 

length in multiples of 100 ms (n x 100 ms)

 

 

in non-error corrected mode only.

 

 

n = 1–9

\G

End-to-end, modem-to-modem

0 — Disable (default)

 

flow control

1

— Enable

 

 

\L

MNP mode

0 — Stream (default)

 

 

1

— Block

 

 

 

 

(continued)

 

 

 

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Contents Member of the 3Com Impact product family Isdn External Digital Modem User Guide3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Support from 3Com C-4 Returning Products for Repair C-4 QuickSelectFigures Tables About this Guide How to Use This GuideIntroduction Conventions Introduction Introduction 3Com Impact digital modem provides the following 3Com Impact Digital Modem FeaturesVoice Capabilities Data CapabilitiesSimultaneous Data and Voice Capabilities 3Com Impact Digital Modem Package Contents 3ComA * J6 Isdn Digital Line Configuration RequirementsAT&T 5ESS Computer System RequirementsEwsd ISDN-1Apple Macintosh Requirements IBM PC or Compatible RequirementsClear to Send CTS From digital modem Ring Indicator RI Signal Ground GNDCabling Requirements DTRBack Panel Power Switch and Connectors Installing Configuring Digital ModemLED Installing the Digital Modem in an IBM-compatible PC Installing the 3Com Impact Digital ModemInstalling the Digital Modem in an Apple Macintosh Computer Installing the 3Com Impact Digital Modem Configuring the 3Com Impact Digital Modem Select Run from the File menu. In the Run dialog box, type Configuration for IBM PC or Compatible ComputerCOM port to which the digital modem is connected Installing and Configuring the Digital Modem Registers Installing and Configuring the Digital Modem Install Installing and Configuring the Digital Modem Configuration for Apple Macintosh Computer Installing and Configuring the Digital Modem Placing Isdn Data Calls Placing and Receiving CallsMultilink PPP Calls With Dynamic Bandwidth Allocation Installing and Configuring the Digital Modem Using Communications Software to Place Calls Using the Phone Out PortIncoming circuit-switched data calls from other Placing Analog Modem CallsReceiving Calls Using the Phone Out Port Placing Calls Using the Phone Out PortProtocol Support T1 access linesAsync-Sync PPP Conversion QuickSelectTroubleshooting Tips TroubleshootingTroubleshooting Monitor the B-1 and B-2 LEDs Troubleshooting Downloading Firmware to Your External Digital Modem If problems persist, refer to Appendix C,Technical SupportClick the Tools button Firmware and Tests buttons appear Click the Firmware button Firmware dialog box appearsClick OK Overview AT Command SETAT gets the attention of your 3Com Impact digital modem Type AT Command Set for the 3Com Impact Digital Modem AT Commands REGISTERS, and Result CodesTable B-1 summarizes the AT command set SN= SN?Commands Settings AT \S\T0 disables inactivity timer default Initial configuration setATC1 AT Command Set for Internal Analog Fax ModemReceived line signal level Results of commandsNon-error corrected mode only Flow control Enable MNP mode Stream default BlockMNP extended services Mode to be negotiated in a DirectEnable inhibits MNP extended Answer mode detection phaseRemote S Registers Isdn PPP Magic-Number Block Service providerS83 Table B-4 lists the 3Com Impact digital modem result codes Digital Modem Result Codes3Com Bulletin Board Service On-line Technical ServicesWorld Wide Web Site 3ComFacts Automated Fax ServiceAsk3Com on CompuServe To use Ask3Com Log on to CompuServeCountry Fax Number Hong Kong 852 537 Support from Your Network SupplierCountry Fax Number Italy 1678 Norway 800 Sweden 020 0800Returning Products for Repair Support from 3ComTo obtain an RMA number, call or fax Country Telephone Number Fax NumberLimited Warranty 3Com Corporation Bayfront Plaza Interference Handbook Canadian Notice

DIGITAL MODEM specifications

The 3Com Digital Modem represents a significant advancement in communication technology, designed to enhance data transmission over telephone lines. This modem is a part of a lineage of 3Com products that focus on delivering robust networking solutions, tailored for both personal and professional use.

One of the main features of the 3Com Digital Modem is its high-speed data transfer capabilities. With speeds reaching up to 56 Kbps, it allows users to send and receive large amounts of data quickly, which is essential for applications that require efficient data exchange. This speed ensures smoother internet browsing, quicker downloads, and more reliable connections for applications such as video conferencing and online gaming.

The modem is equipped with advanced error correction technologies, including V.42 and V.42bis protocols. These protocols help to maintain data integrity by detecting and correcting errors during transmission. This results in a more reliable connection, reducing the likelihood of dropped calls or corrupted data transfers, which can be particularly frustrating for users engaged in critical business communications.

Another notable characteristic of the 3Com Digital Modem is its compatibility with various operating systems, making it versatile for different users. It supports Windows, Mac, and various other platforms, ensuring that it can be integrated seamlessly into existing systems without the need for extensive configuration. This plug-and-play capability simplifies installation for users, allowing them to get connected quickly and efficiently.

The modem also incorporates an innovative design that facilitates improved heat dissipation, ensuring optimal performance during prolonged use. Its compact form factor makes it suitable for both home and office environments, allowing for easy setup without consuming excessive desk space.

In addition to these features, the 3Com Digital Modem boasts strong security protocols, ensuring that users' data is protected against unauthorized access while being transmitted. This is particularly important in today’s digital landscape, where data breaches and cyber threats are prevalent.

Overall, the 3Com Digital Modem combines speed, reliability, and security, making it a valuable asset for anyone looking to enhance their connectivity experience. Its robust feature set and user-friendly design cater to a broad audience, from casual users to business professionals, reflecting the evolution of modem technology in a digital-first world.
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