Lucent Technologies 7400B manual RegisterS21, Range of Values Storable Comments See Also

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APPENDIX B: S-REGISTERS

DEFINITY Communications System

 

7400B Data Module

Page B-12

User’s Guide

 

 

Register:S21

Description: This S-register is used to store the status of bit-mapped options as follows:

bit 0 — not used (default = 0, see comment 1)

bit 1 — not used (always set to 0)

bit 2 — not used (default = 0, see comment 1)

Range of Values:

Storable:

Comments:

See Also:

bits 3 and 4 — DTR options; value depends on argument of DTR option command (default = 00, see &D command)

bit 5 — DCD options; 0 = always on, 1 = EIA-232-D standard (default = 0, see &C command)

bit 6 — DSR options; 0 = always on, 1 = EIA-232-D standard (default = 0, see &S command)

bit 7 — not used (default = 0 see comment 1)

Value may be 00 to FF hexadecimal; factory-default settings produce a value of 00 (see comment 2).

yes

1.For the 7400B Data Module, bits 0, 2, and 7 will be set by the appropriate command, however, there will be no other effect.

2.Refer to the explanation of hexadecimal values under the Range of Values label description at the beginning of this appendix.

Chapter 4, “Operation and Configuration”; refer to the indicated AT command in Appendix A, “AT Command Set.”

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Contents AT&T 7400B Data Module To Order Copies of this Manual Contents Preface about this Guide 1C-1C-2C-5C-8 Conventions TypographicalOrganization of this GuideAppendix C Application Notes. Contains notes on how to Troubleshooting. Describes procedures forAppendix D Quick-Reference Summaries. Contains quick RelatedIntroduction Front Panel External FeaturesFront Panel LED Indicator Descriptions Connector DescriptionRear Panel Rear Panel Connector DescriptionsPower Supply Unit Requirements HardwareSoftware Typical Standalone Installation Typical Installation with Telephone Installation Installation With/Without Telephone Option SW1-1 Selecting DIP-Switch OptionsMake Busy on Local Loop Option SW1-8 InstallationData Metering Option SW1-5 Option DIP Switch Settings Factory-defaultTelephone SW1-1 Data Metering SW1-5Accessing the Hardware Option Switches Connecting the EIA-232-D Cable Supply Connecting the PowerIf YOU are Using a PC Power-Up Self-TestIf YOU are Using a Dedicated TerminalOperating Modes Line or data modeCharacter Formats Data Bits Parity Stop BitsEssential AT Commands More AT Command DescriptionAT Command Subset Connect AT Command Subset ContdBusy Starting the Session Sample ON-LINE SessionSelection +++ No CarrierConfiguration Parameters Operation and ConfigurationCommand Line Action Command Line Prefix Issuing CommandsCommand Buffer Command Line Set UpAts3= ddd Enter Acknowledgement CommandVerbose Form Numeric Description Result CodesMultiple Characters From Data Mode to Command Mode and Back Dialing a NumberFollowing is an example At&z m=nnn...n Enter Commands for Using Stored Telephone NumbersRemote Site USE ResetConfiguration Recall At&f Enter Chapter HOW to USE thisPBX Symptom Problem SolutionCheck Speed LED At&d2 Enter Terminate the local loopback test by typing Atq0 o Enter Atx4 Enter LabelDescription Appendix a AT Command SETContd Escape sequence Immediate None Arguments none Registernone Examplea CommandAArguments none CommandD Command Function Switch hook control Ato Enter Command Function Type Arguments Register Example CommentsAtv Enter A-10 User’s Guide Reset and recall a stored profile Data Carrier Detect DCD options Data Terminal Ready DTR options Arguments none Registernone Example Command&FAt&t3 Enter see comment At&v Enter Registernone Example Command&YAt&z2=555-1212 Enter 055 Description Range Values Comments See Also Storable Comments Register DescriptionStorable From a data terminal Register S6 not used Register S8 not used S9 not used Register S13 not used Register S11 not usedRegister S15 not used Register Description Range Values Storable Comments See AlsoRegister S17 not used Register S19 not used S20 not used Values StorableRange of Values Storable Comments See Also RegisterS21Bits 0 and 1 not used default = 2, see comment Register S24 not used Register S27 not used AT&T 7400B Data Module PC Application Guide, ordering number PBX Application Notes PC Applications GuideProcomm Plus Configuring the SoftwareSelect Modem Options Select Result MessagesPlacing a Call Select Save Setup OptionsC-4 Disconnecting CallSelect Call a Host Relay GoldPlacing a Call Directly Attmail DirectoryPress Esc to return to the Online menu as shown below Disconnecting a CallSelect the letter next to Hayes Smartmodem all models CrosstalkSelect the baud rate that you will use most often Bye Enter Appendix D QUICK-REFERENCE Summaries Sr=n Command DescriptionTable D-1 AT Command SET Table D-1 AT Command SET Contd Table D-2 S-REGISTER Summary Register Description Range/UnitTable D-3 Result Codes ConnectedR e Parameter Value AT CommandTable D-4 FACTORY-DEFAULT Configuration Parameter Value Register Table D-4 FACTORY-DEFAULT Configuration ContdTable D-5 EIA-232-D PIN Assignments Pin Circuit Direction FunctionTable D-6 Ascii Character SET Ascii Control KEY Value CharacterTable D-6 Ascii Character SET Contd Glossary Glossary Script files. See command files Index Data Metering DTE, see Data Terminal Device DTR leadRear 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.

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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.
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