Configuring the 3Com Impact Digital Modem

2-9

5Select the type of switch, as specified by your telephone company, from the Telephone Company Switch drop-down list box.

6Click in the Telephone Number field in the Number 1 area and enter the telephone number to which your digital modem is connected.

7Click in the Service Profile Identifier (SPID) field and enter the corresponding SPID for the telephone number you entered in the previous step.

You should have received this SPID from your telephone company.

CAUTION: If the ISDN line has been configured with only one telephone number (Point-to-Point), do not include the SPID.

8Specify which device should receive the calls coming to Telephone Number 1.

You can select Phone Port or Internal Fax/Modem. If your model has the internal analog fax modem installed (Models 3C872 and 3C877), you can select both.

If both boxes are checked, the internal analog fax modem and the phone will both ring, enabling you to answer using either device.

9If you have a second telephone number associated with your ISDN telephone line (some telephone companies require two), enter the number and corresponding SPID in the appropriate fields in the Number 2 area.

10Specify which device should receive the calls coming to Telephone Number 2.

11Click the Configure button to download the parameters listed in steps 5 through 10 to your digital modem’s

S registers.

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3Com DIGITAL MODEM manual Registers
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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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