CHAPTER 3: FIRST TIME USERS

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DEFINITY Communications System

7400B Data Module

User’s Guide

A SAMPLE ON-LINE SESSION

Starting the Session

EXAMPLE 4: Changing data options.

at el &d2 s0=5 [ Enter ]

This command line is a command sequence that sets up the 7400B Data Module to automatically answer incoming calls. The commands set the following parameters:

AT is the required command prefix,

e1 causes characters entered from the keyboard to be echoed to the screen while in command mode

&d2 causes the data module to hang up the call when the local terminal turns off DTR

s0=5 causes the data module to enter automatic answer mode and answer incoming calls on the fifth ring.

This section outlines how to perform a simple on-line session using the AT commands described in this chapter. For more information about all AT commands, see Chapter 4, "Operation and Configuration" and Appendix A, “AT Command Set.”

The following is a sample data call to a fictitious bulletin board service. If you know the number of a "real" bulletin board service, you might try an actual log on by using that number and following the suggestions in this session.

at d 9-555-7575 [ Enter ]

CONNECT 1200

The D command is used to dial the number of the bulletin board. Since the connection was made successfully, the data module responded with a message that says the remote end connected at 1200 bps.

The remote end may do nothing until you press a particular key a few times, usually [ Enter ]. Typical of many data communications application programs, this sometimes required input lets the remote end determine whether you have connected with the correct communications parameters in effect.

Possible Display Problems If the response from the remote end is unintelligible “garbage,” chances are that the speed or parity bit selection is incorrect. In this case,

assuming that your terminal device allows, the parameters may be corrected without disconnecting the call. Otherwise, you must disconnect, correct the parameters, and then try the call again.

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Lucent Technologies 7400B manual Sample ON-LINE Session, Starting the Session

7400B specifications

The Lucent Technologies 7400B is a notable entry in the landscape of telecommunications and networking technology, showcasing an innovative blend of features and capabilities that cater to the evolving demands of modern communication systems. Released as part of the company's broader portfolio aimed at enhancing network efficiency and reliability, the 7400B addresses the needs of both voice and data transmission organized around high-performance protocols.

One of the main features of the Lucent Technologies 7400B is its advanced signal processing capabilities. The device is built to handle a significant amount of bandwidth, making it suitable for high-capacity environments where data traffic can fluctuate dynamically. With its ability to support various signaling protocols, the 7400B is adept at integrating with existing infrastructure while providing the flexibility required to adopt emerging technologies.

The 7400B employs state-of-the-art voice encoding and compression techniques that optimize the quality of voice communications. This technology ensures clarity and minimizes latency, which is crucial for enterprises relying heavily on voice-over-IP (VoIP) applications and unified communications. The system supports multiple codecs, enabling it to seamlessly manage both traditional telephony and next-generation voice services.

In terms of reliability, the Lucent 7400B features robust redundancy protocols, ensuring continuous service availability even in the face of potential hardware failures or unexpected disruptions. It also includes built-in diagnostic tools that facilitate rapid troubleshooting, allowing technicians to identify and resolve issues efficiently. This focus on reliability makes the 7400B a preferred choice for critical business applications where downtime can lead to significant productivity losses.

The integration of advanced networking technologies such as Quality of Service (QoS) further enhances the performance of the 7400B. This capability ensures that high-priority applications receive the necessary bandwidth, maintaining optimal performance levels regardless of overall network traffic loads.

Moreover, the Lucent Technologies 7400B is designed with scalability in mind. Organizations can start with a basic configuration and expand their capacity as needed, thus ensuring that their investment remains relevant as their communication demands grow. This scalability is complemented by a user-friendly management interface, allowing network administrators to configure and monitor the system with ease.

In summary, the Lucent Technologies 7400B stands out for its advanced signal processing, voice encoding capabilities, reliability features, and scalability. These characteristics make it a vital component for any organization looking to enhance their telecommunications infrastructure and meet the increasingly complex communication needs of today’s digital landscape.