Lucent Technologies 7400B manual Symptom Problem Solution, Pbx

Page 42

CHAPTER 5: TROUBLESHOOTING

DEFINITY Communications System

 

7400B Data Module

Page 5-2

User’s Guide

 

 

Symptom

Problem

Solution

 

 

 

All LEDs are off.

Power is off.

Check that the AC outlet is live.

 

 

Check that the power supply unit is

 

 

connected to the 7400B Data

 

 

Module and to the AC outlet.

POWER/TEST and DATA

The data module has lost

LEDs flash together.

communications with the

 

PBX.

Check that the D8W cord is connected between the LINE connector of the data module and a PBX wall jack. Note also that the line from the PBX must be properly administered for the 7400B Data Module.

Characters typed on keyboard are not displayed on the screen of the terminal device.

If the SD LED does not flash when keys on the terminal are pressed, the EIA-232-D cable is not connected or not properly wired.

Connect or replace the EIA-232-D cable between the data module and the local terminal device.

If the SD LED flashes but the RD LED does not flash, the command echo option is turned off.

The SD and RD LEDs flash, but certain EIA signal leads are turned off.

Press [ Enter ] to start a new command line, and then type

atel [ Enter ]

to turn on the command echo.

Press [ Enter ] to start a new command line, and then type

at&s0&c0 [ Enter ]

to ensure that the appropriate EIA signal leads are turned on.

Page 41 Page 43
Image 42
Page 41 Page 43
Contents AT&T 7400B Data Module To Order Copies of this Manual Contents Preface about this Guide 1C-1C-2C-5C-8 Organization of this TypographicalConventions GuideAppendix D Quick-Reference Summaries. Contains quick Troubleshooting. Describes procedures forAppendix C Application Notes. Contains notes on how to RelatedIntroduction External Features Front PanelConnector Description Front Panel LED Indicator DescriptionsRear Panel Connector Descriptions Rear PanelPower Supply Unit Hardware SoftwareRequirements Typical Standalone Installation Typical Installation with Telephone Installation Installation Selecting DIP-Switch Options With/Without Telephone Option SW1-1Installation Data Metering Option SW1-5Make Busy on Local Loop Option SW1-8 Telephone SW1-1 Factory-defaultOption DIP Switch Settings Data Metering SW1-5Accessing the Hardware Option Switches Connecting the EIA-232-D Cable Connecting the Power SupplyIf YOU are Using a Power-Up Self-TestIf YOU are Using a PC Dedicated TerminalCharacter Formats Line or data modeOperating Modes Data Bits Parity Stop BitsEssential AT Commands AT Command Description AT Command SubsetMore AT Command Subset Contd ConnectBusy Sample ON-LINE Session Starting the SessionNo Carrier Selection +++Operation and Configuration Configuration ParametersCommand Line Action Command Buffer Issuing CommandsCommand Line Prefix Command Line Set UpAts3= ddd Enter Verbose Form Numeric Description CommandAcknowledgement Result CodesFrom Data Mode to Command Mode and Back Dialing a Number Multiple CharactersFollowing is an example Commands for Using Stored Telephone Numbers At&z m=nnn...n EnterReset Configuration RecallRemote Site USE At&f Enter HOW to USE this ChapterSymptom Problem Solution PBXCheck Speed LED At&d2 Enter Terminate the local loopback test by typing Atq0 o Enter Atx4 Enter Appendix a AT Command SET LabelDescriptionContd Escape sequence Immediate None CommandA Arguments noneArguments none Registernone Examplea CommandD Command Function Switch hook control Command Function Type Arguments Register Example Comments Ato EnterAtv Enter A-10 User’s Guide Reset and recall a stored profile Data Carrier Detect DCD options Data Terminal Ready DTR options Command&F Arguments none Registernone ExampleAt&t3 Enter see comment At&v Enter Command&Y Registernone ExampleAt&z2=555-1212 Enter 055 Description Range Values Comments See Also Register Description StorableStorable Comments From a data terminal Register S6 not used Register S8 not used S9 not used Register S11 not used Register S13 not usedRegister Description Range Values Storable Comments See Also Register S15 not usedRegister S17 not used Values Storable Register S19 not used S20 not usedRegisterS21 Range of Values Storable Comments See AlsoBits 0 and 1 not used default = 2, see comment Register S24 not used Register S27 not used PBX Application Notes PC Applications Guide AT&T 7400B Data Module PC Application Guide, ordering numberSelect Modem Options Configuring the SoftwareProcomm Plus Select Result MessagesSelect Save Setup Options Placing a CallDisconnecting Call C-4Relay Gold Placing a Call DirectlySelect Call a Host Directory AttmailDisconnecting a Call Press Esc to return to the Online menu as shown belowCrosstalk Select the letter next to Hayes Smartmodem all modelsSelect the baud rate that you will use most often Bye Enter Appendix D QUICK-REFERENCE Summaries Command Description Table D-1 AT Command SETSr=n Table D-1 AT Command SET Contd Register Description Range/Unit Table D-2 S-REGISTER SummaryConnected Table D-3 Result CodesParameter Value AT Command Table D-4 FACTORY-DEFAULT ConfigurationR e Table D-4 FACTORY-DEFAULT Configuration Contd Parameter Value RegisterPin Circuit Direction Function Table D-5 EIA-232-D PIN AssignmentsAscii Control KEY Value Character Table D-6 Ascii Character SETTable D-6 Ascii Character SET Contd Glossary Glossary Script files. See command files Index DTE, see Data Terminal Device DTR lead Data MeteringRear panel, 1-4Remote site use AT&T Important Safety Instructions Page Important Installation Safety Instructions

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.
Top Page Image Contents