2-2 CHAPTER 2: INSTALLING AND CONFIGURING THE DIGITAL MODEM

Table 2-1 Front Panel LED Indicator Definitions

LED

Color

Description

 

 

 

Power

Yellow

Power Indicator. Lit when power is on and remains lit as long

 

 

as power is available from the ac wall transformer plugged into

 

 

the electrical outlet.

Test

Yellow

Self-Test/Status. Flashes when the digital modem is

 

 

executing its power-up self-test or a user-initiated reset. If the

 

 

results of the self-test or reset are normal, the LED goes off. If

 

 

the result of the self-test is abnormal and a fault is detected,

 

 

the LED remains lit but does not flash.

D-Channel

Yellow

D Channel/Status. Provides a quick indication of the ISDN

 

 

physical network interface and D channel status. If the physical

 

 

ISDN interface is not synchronized or is disconnected, this LED

 

 

remains lit.

 

 

If the physical interface establishes synchronization and the

 

 

ISDN D channel signaling procedures are not properly

 

 

established, the LED flashes.

 

 

Once the physical and D channel signaling are synchronized,

 

 

the LED goes off.

 

 

If any physical loss of framing occurs, the LED lights; if there is

 

 

a loss of D channel signaling, the LED flashes.

B-1

Yellow

B-1 Channel Indicator. Indicates the activity state of the B-1

 

or

channel of the ISDN interface. Green indicates a

 

green

circuit-switched data call. Yellow indicates a circuit-switched

 

 

voice call. If a call is in a dialing state, the LED flashes. When a

 

 

call enters the active state, the appropriate LED color stays lit.

 

 

When the call is disconnected, the LED goes off.

B-2

Yellow

B-2 Channel Indicator. Indicates the activity state of the B-2

 

or

channel of the ISDN interface. Green indicates a

 

green

circuit-switched data call. Yellow indicates a circuit-switched

 

 

voice call. If a call is in a dialing state, the LED flashes. When a

 

 

call enters the active state, the appropriate LED color stays lit.

 

 

When the call is disconnected, the LED goes off.

 

 

 

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3Com DIGITAL MODEM manual Led

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.