CHAPTER 3: FIRST TIME USERS

DEFINITY Communications System

 

7400B Data Module

Page 3-4

User’s Guide

 

 

AT Command

Description

 

 

+++

The escape character sequence. This is one of the two

 

commands that does not require the AT prefix. Once

 

you have connected to the remote device, your data

 

module assumes the on-line mode of operation. If you

 

need to return to the command mode, leave the keyboard

 

idle for at least one second, and then type +++ without

 

pressing [ Enter ]. Within a few seconds, the data module

 

will respond with OK, signifying that it has entered the

 

command mode and is waiting for you to type a

 

command.

 

Whether OK is returned or not depends on the setting of

 

certain parameters. If the factory-default settings are in

 

effect, OK should be returned.

O

The return to On-line command. After using the +++

 

escape sequence to enter command mode, you can type

 

ato and press [ Enter ] to return to on-line mode.

 

Note: This command will not work if you have

 

disconnected the data call.

H

The hang up or disconnect command. After using the

 

+++ escape sequence to enter command mode, you can

 

type ath and press [ Enter ] to disconnect the data call.

&F

The return to Factory-default settings command. If an

 

experimental change of your data module settings

 

produces unexpected results — and you are not sure how

 

to get out of the fix — type AT&F and press [ Enter ]. This

 

will return all configuration parameters back to the

 

factory-default settings.

TABLE 3-2 AT Command Subset (Contd.)

SAMPLE COMMAND LINES This section presents a few sample AT command lines with explanations of the results they will produce.

EXAMPLE 1: Dialing a number.

at d 5551212 [ Enter ]

CONNECT 2400

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Lucent Technologies 7400B manual AT Command Subset Contd, Connect

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.

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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.

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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.