Paradyne 3821PLUS User Manual

COMSPHERE3821PLUS MODEMUSER’S GUIDEDocument No. 3821-A2-GB20-30February 1998

Table of Contentsiii3821-A2-GB20-30 February 1998D. Technical SpecificationsE. Pin AssignmentsEIA-232-E Pin Assignments E-1. . . . . . . . . . . . .

5-13821-A2-GB20-30 February 1998 Fax OperationOverview 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-13821-A2-GB20-30 February 1998 Remote AccessOverview 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus Modem6-2 February 1998 3821-A2-GB20-30NOTEIf a connection is not establishedbetween a local COMSPHEREmodem and a remote 3821Plusmod

7-13821-A2-GB20-30 February 1998 SecurityOverview 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus Modem7-2 February 1998 3821-A2-GB20-30VF PasswordsVF passwords consist of DTMF tones and are enteredby the originating caller using

Security7-33821-A2-GB20-30 February 1998 Callback SecurityCallback Security causes the responding modem todisconnect and call back to the phone numbe

COMSPHERE 3821Plus Modem7-4 February 1998 3821-A2-GB20-30EditPassWdTable The Password Table is the modem’s security database.It contains all essential

Security7-53821-A2-GB20-30 February 1998 Table 7-1(2 of 2)Edit Password Table Group OptionsEdit PsWd xxxxNxt  yyyyyyyy or zzzzzzEdit Password. All

COMSPHERE 3821Plus Modem7-6 February 1998 3821-A2-GB20-30Set Answer Sec Set Answer Security determines if dial access securityis enabled or disabled.

Security7-73821-A2-GB20-30 February 1998 Set Orig SecurSet Originate Security controls whether or not themodem can originate a call using AT commands

v3821-A2-GB20-30 February 1998PrefaceObjectives and ReaderAssumptionsThis guide describes how to install the 3821Plus circuitcard and operate the 3821

COMSPHERE 3821Plus Modem7-8 February 1998 3821-A2-GB20-30Set Admin PsWdSet Administration Password is used to change theAdministration Password value.

Security7-93821-A2-GB20-30 February 1998 Security ConfigurationOptionsThe Security Configuration Options group under theConfigure branch allows you t

COMSPHERE 3821Plus Modem7-10 February 1998 3821-A2-GB20-30Table 7-5(2 of 3)Security Configuration OptionsDTE_PW_TermChar: 013Nxt 013DTE Password Term

Security7-113821-A2-GB20-30 February 1998 Table 7-5(3 of 3)Security Configuration OptionsOriginate_Secur: No_OrigSecNxt No_OrigSec Ena_Orig_SecOrigin

A-13821-A2-GB20-30 February 1998SDCP Menu TreeOverview A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus ModemA-2 February 1998 3821-A2-GB20-30Call_SetupStatus Test(Modem Status)DialDisconnectAnswerChange_DirectoryDirectory Locations 1

SDCP Menu TreeA-33821-A2-GB20-30 February 1998ConfigureLd EditArea frm:Edit SaveChoose FunctionActive (Saved) Customer1 Customer2V42/MNP/BufferErr Co

COMSPHERE 3821Plus ModemA-4 February 1998 3821-A2-GB20-30Control RemoteSecondary Prim (data blckd)(ExitRem appears instead of Remote when using Remote

B-13821-A2-GB20-30 February 1998Result CodesOverview B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus ModemB-2 February 1998 3821-A2-GB20-30Table B-1(2 of 3)Result CodesNumbers (1) DescriptionWordNumbers (2)15 14 CONNECT 19200** Conn

COMSPHERE 3821Plus Modemvi February 1998 3821-A2-GB20-30Related Documents3000-A2-GA31 COMSPHERE 3000 SeriesCarrier Installation Manual3980-A2-GB30 COM

Result CodesB-33821-A2-GB20-30 February 1998Table B-1(3 of 3)Result CodesNumbers (1) DescriptionWordNumbers (2)43 43 CONNECT 21600/ EC*** Connection

C-13821-A2-GB20-30 February 1998TroubleshootingOverview C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus ModemC-2 February 1998 3821-A2-GB20-30Table C-2Online OperationSymptomActionData scrambled orunreadableVerify that the character fo

TroubleshootingC-33821-A2-GB20-30 February 1998Table C-5(1 of 2)Modem – VF ConnectionSymptomActionModem does not receive adial toneCheck the VF line

COMSPHERE 3821Plus ModemC-4 February 1998 3821-A2-GB20-30Table C-5(2 of 2)Modem – VF ConnectionSymptom ActionIntermittent disconnects,high error rates

TroubleshootingC-53821-A2-GB20-30 February 1998Automatic FirmwareDownloadNew releases may be available for the 3821Plusmodem. The latest 3821Plus fir

D-13821-A2-GB20-30 February 1998Technical SpecificationsTable D-1(1 of 2)Model 3821Plus Technical SpecificationsSpecificationsDescriptionAPPROVALS Ref

COMSPHERE 3821Plus ModemD-2 February 1998 3821-A2-GB20-30Table D-1(2 of 2)Model 3821Plus Technical SpecificationsSpecifications DescriptionENVIRONMENT

E-13821-A2-GB20-30 February 1998Pin AssignmentsEIA-232-E Pin Assignments E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus ModemE-2 February 1998 3821-A2-GB20-30JM8 to RJ11 Crossover CableFor 2-wire leased-line connections to a JM8 networkinterface, an 8

1-13821-A2-GB20-30 February 1998 IntroductionOverview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pin AssignmentsE-33821-A2-GB20-30 February 1998NIM Cable Pin AssignmentsTable E-2 lists the pin assignments for the 50-pin cableconnected to the NIM.

F-13821-A2-GB20-30 February 1998ITU-T V.25bis Dialing Commandsand ResponsesOverview F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus ModemF-2 February 1998 3821-A2-GB20-30Call Request CommandsCall Request commands are issued from the DTE tothe modem and are respon

ITU-T V.25bis Dialing Commands and ResponsesF-33821-A2-GB20-30 February 1998Call Connecting (CNX)The CNX response informs the DTE that the modemhas c

COMSPHERE 3821Plus ModemF-4 February 1998 3821-A2-GB20-30Command Response A Command Response indicates that the commandentered was a valid or invalid

ITU-T V.25bis Dialing Commands and ResponsesF-53821-A2-GB20-30 February 1998Table F-2 lists V.25bis response messages supported bythe 3821Plus modem.

G-13821-A2-GB20-30 February 1998Equipment ListEquipment Order Number Part Number3821Plus Modem Card (three modems per card) 3821-B1-001 —NIM with Make

H-13821-A2-GB20-30 February 1998Country-Specific ConfigurationOptionsConfiguration Options by Country Code H-1. . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus ModemH-2 February 1998 3821-A2-GB20-30Table H-1(1 of 5)Configuration Options by Country (A through M)Strap Description DCP Choice A

Country-Specific Configuration OptionsH-33821-A2-GB20-30 February 1998Table H-1(2 of 5)Configuration Options by Country (A through M)AustraliaJapanIt

COMSPHERE 3821Plus Modem1-2 February 1998 3821-A2-GB20-30• Storage of up to 10 telephone numbers to directorylocations.• Originate Security and three

COMSPHERE 3821Plus ModemH-4 February 1998 3821-A2-GB20-30Table H-1(3 of 5)Configuration Options by Country (A through M)AustraliaJapanItalyIsraelGerma

Country-Specific Configuration OptionsH-53821-A2-GB20-30 February 1998Table H-1(4 of 5)Configuration Options by Country (A through M)AustraliaJapanIt

COMSPHERE 3821Plus ModemH-6 February 1998 3821-A2-GB20-30Table H-1(5 of 5)Configuration Options by Country (A through M)AustraliaJapanItalyIsraelGerma

Country-Specific Configuration OptionsH-73821-A2-GB20-30 February 1998Table H-2(1 of 5)Configuration Options by Country (N through Z)Strap Descriptio

COMSPHERE 3821Plus ModemH-8 February 1998 3821-A2-GB20-30Table H-2(2 of 5)Configuration Options by Country (N through Z)NetherlandsUnited KingdomTurke

Country-Specific Configuration OptionsH-93821-A2-GB20-30 February 1998Table H-2(3 of 5)Configuration Options by Country (N through Z)NetherlandsUnite

COMSPHERE 3821Plus ModemH-10 February 1998 3821-A2-GB20-30Table H-2(4 of 5)Configuration Options by Country (N through Z)NetherlandsUnited KingdomTurk

Country-Specific Configuration OptionsH-113821-A2-GB20-30 February 1998Table H-2(5 of 5)Configuration Options by Country (N through Z)NetherlandsUnit

Glossary-13821-A2-GB20-30 February 1998GlossaryActive (Operating) A configuration area containing configuration options currently in use by the modem.

COMSPHERE 3821Plus ModemGlossary-2 February 1998 3821-A2-GB20-30automatic answer A capability to respond to a call received over a dial line.automode

Introduction1-33821-A2-GB20-30 February 1998 Table 1-13821Plus LEDsLabelColor IndicatesALRM A red Alarm AON: Modem A has detected a problem with its

GlossaryGlossary-33821-A2-GB20-30 February 1998configuration option Modem software that sets specific operating parameters for the modem. Sometimesre

COMSPHERE 3821Plus ModemGlossary-4 February 1998 3821-A2-GB20-30directory location Nonvolatile memory that stores up to ten telephone numbers. Each di

GlossaryGlossary-53821-A2-GB20-30 February 1998handshaking The exchange of predetermined codes and signals (tones) to establish a connectionbetween t

COMSPHERE 3821Plus ModemGlossary-6 February 1998 3821-A2-GB20-30Originate mode The state of a modem ready to transmit a call. In a dial network, it is

GlossaryGlossary-73821-A2-GB20-30 February 1998S-registers Registers that contain information affecting modem operation. S-register commandsmust be p

COMSPHERE 3821Plus ModemGlossary-8 February 1998 3821-A2-GB20-30V.42bis ITU-T standard for data compression.V.54 ITU-T standard for local and remote d

Index-13821-A2-GB20-30 February 1998IndexSymbols! (hook flash), 4-4“,” dial modifier (Pause), 4-3“,” Pause Time (S8), 4-17“;” (return to command mode)

COMSPHERE 3821Plus ModemIndex-2 February 1998 3821-A2-GB20-30O (Online Mode), 4-4Q (Result Codes), 3-27, 4-5recovering use of, 4-26Sn? (Display S–regi

IndexIndex-33821-A2-GB20-30 February 1998Dial Command modifiersP (Pulse dial), 3-30T (Tone dial), 3-30dial command modifiers, 4-3Dial Line Rate, 3-34

COMSPHERE 3821Plus ModemIndex-4 February 1998 3821-A2-GB20-30Hhang up (ATH), 4-4Hidden Choice Indicators, 1-4hook flash, 4-4Hook Switch Control (ATH),

COMSPHERE 3821Plus Modem1-4 February 1998 3821-A2-GB20-30SDCP OperationThe SDCP on the 3000 Series Carrier is the userinterface to all functions used

IndexIndex-53821-A2-GB20-30 February 1998Pattern (Test branch), 3-14Pause Time (for “,” dial modifier), 3-31pin assignmentsEIA–232–E, E-1JM8 to RJ11

COMSPHERE 3821Plus ModemIndex-6 February 1998 3821-A2-GB20-30Self (Test branch), 3-13self-test, 3-13AT&T9, 4-11failure, C-1Send Break Control, 3-4

00282600– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

2-13821-A2-GB20-30 February 1998 3821Plus Modem InstallationOverview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus Modem2-2 February 1998 3821-A2-GB20-30P26 P25P24P23P20 P19J2 P22J1P21495-14854TO P23OR P25TO P24OR P26NETWORKINTERFACEMODULE(NIM)NI

3821Plus Modem Installation2-33821-A2-GB20-30 February 1998 Attach the DTE Interface AssemblyThe eight-slot DTE interface assembly can be mountedon t

COMSPHERE 3821Plus ModemA February 1998 3821-A2-GB20-30COMSPHERE3821Plus ModemUser’s Guide3821-A2-GB20-304th Edition (February 1998)Changes and enhanc

COMSPHERE 3821Plus Modem2-4 February 1998 3821-A2-GB20-30Install the Circuit CardSlide the 3821Plus card into its slot in the 3000 SeriesCarrier. Pres

3821Plus Modem Installation2-53821-A2-GB20-30 February 1998 Install CommunicationsSoftwareA computer commands and controls a modem throughcommunicati

COMSPHERE 3821Plus Modem2-6 February 1998 3821-A2-GB20-305. Press the key until the appropriate factorypreset appears on the LCD, and press thecor

3821Plus Modem Installation2-73821-A2-GB20-30 February 1998 To change a factory template using AT commands,perform the following steps (for more info

3-13821-A2-GB20-30 February 1998 SDCP MenusMenu Structure 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus Modem3-2 February 1998 3821-A2-GB20-30Menu StructureAn elaborate menu of options is available from aShared Diagnostic Control Panel

SDCP Menus3-33821-A2-GB20-30 February 1998 Modem Status MessagesAccess to all menu tree branches from the SDCPbegins at the Top-Level menu, the head

COMSPHERE 3821Plus Modem3-4 February 1998 3821-A2-GB20-30Table 3-1(2 of 3)Top-Level Menu StatusNormal CallSetup MessagesIndicatesOff Hook The modem is

SDCP Menus3-53821-A2-GB20-30 February 1998 Table 3-1(3 of 3)Top-Level Menu StatusCall DisconnectMessages,continuedIndicatesLongSpace Disc The modem h

COMSPHERE 3821Plus Modem3-6 February 1998 3821-A2-GB20-30Table 3-3Dial Access Security MessagesDial AccessSecurityMessagesIndicatesGet VF PsWd The ans

Safety InstructionsB3821-A2-GB20-30 February 1998Important Safety Instructions1. Read and follow all warning notices and instructions marked on the pr

SDCP Menus3-73821-A2-GB20-30 February 1998 Modem Select BranchThe Modem Select branch is the top level of the menustructure. The modem selections are

COMSPHERE 3821Plus Modem3-8 February 1998 3821-A2-GB20-30ffff Displays the modem’s modulation scheme asshown below:V34 indicates V.34 family modulatio

SDCP Menus3-93821-A2-GB20-30 February 1998 Call Setup BranchThe Call Setup branch of the Top-Level menu allowsyou to dial, disconnect, and answer tel

COMSPHERE 3821Plus Modem3-10 February 1998 3821-A2-GB20-30Change DirectoryChange Directory allows you to enter or modifytelephone numbers. The modem h

SDCP Menus3-113821-A2-GB20-30 February 1998 Status BranchThe Status branch of the Top-Level menu allows youto view the current status of the dial or

COMSPHERE 3821Plus Modem3-12 February 1998 3821-A2-GB20-30IdentityIdentity displays the modem’s serial number, modelnumber, firmware revision level, h

SDCP Menus3-133821-A2-GB20-30 February 1998 To exit this function and remain in the Status branch,press the key. To exit and return to the Top-Lev

COMSPHERE 3821Plus Modem3-14 February 1998 3821-A2-GB20-30If the Test Timeout configuration option is enabled,Test Timeout appears at the conclusion o

SDCP Menus3-153821-A2-GB20-30 February 1998 To exit this function and remain in the Test branch,press the key. To exit and return to the Top-Level

COMSPHERE 3821Plus Modem3-16 February 1998 3821-A2-GB20-30Activ(Operating)Active(Saved)Customer1Customer2FactoryAsync_DialSync_DialSync_LeasedUNIX_Dia

COMSPHERE 3821Plus ModemC February 1998 3821-A2-GB20-30Notices

SDCP Menus3-173821-A2-GB20-30 February 1998 Scroll to and select the Misc configuration optionsgroup.F1Edit StrapGroup <Test

COMSPHERE 3821Plus Modem3-18 February 1998 3821-A2-GB20-30• The key causes you to exit the Configurebranch and return to the Top-Level menu. If an

SDCP Menus3-193821-A2-GB20-30 February 1998 Table 3-4(1 of 6)DTE Interface Configuration OptionsAsync/Sync Mode: AsyncNxt Async SyncAsynchronous/

COMSPHERE 3821Plus Modem3-20 February 1998 3821-A2-GB20-30Table 3-4(2 of 6)DTE Interface Configuration OptionsAsyn Parity Bit: NoneNxt None Even Odd M

SDCP Menus3-213821-A2-GB20-30 February 1998 Table 3-4(3 of 6)DTE Interface Configuration OptionsDTR Action: IgnoreNxt Stndrd_RS232 Ignore Cntrl

COMSPHERE 3821Plus Modem3-22 February 1998 3821-A2-GB20-30Table 3-4(4 of 6)DTE Interface Configuration OptionsRTS Action: IgnoreNxt Ignore Stndrd_RS23

SDCP Menus3-233821-A2-GB20-30 February 1998 Table 3-4(5 of 6)DTE Interface Configuration OptionsRTS/CTS Delay: 0 msecNxt 0msec 10msec 50msec

COMSPHERE 3821Plus Modem3-24 February 1998 3821-A2-GB20-30Table 3-4(6 of 6)DTE Interface Configuration OptionsTX Clock Source: InternalNxt Internal Ex

SDCP Menus3-253821-A2-GB20-30 February 1998 DTE Dialer The DTE Dialer configuration options establish theDTE-to-modem protocol for call establishment

COMSPHERE 3821Plus Modem3-26 February 1998 3821-A2-GB20-30Table 3-5(2 of 5)DTE Dialer Configuration Options*Escape GuardTim: 1secNxt 1sec 200msec 400m

Safety InstructionsD3821-A2-GB20-30 February 1998Government Requirements and Equipment ReturnCertain governments require that instructions pertaining

SDCP Menus3-273821-A2-GB20-30 February 1998 Table 3-5(3 of 5)DTE Dialer Configuration Options*Linefeed Char: 010 ASCINxt ↑ 010 ASCILine Feed Characte

COMSPHERE 3821Plus Modem3-28 February 1998 3821-A2-GB20-30Table 3-5(4 of 5)DTE Dialer Configuration Options*ResultCode Form: WordsNxt Words Numbers (1

SDCP Menus3-293821-A2-GB20-30 February 1998 Table 3-5(5 of 5)DTE Dialer Configuration OptionsV25bis IdleFill: MarkNxt Mark FlagV.25bis Idle Fill. Det

COMSPHERE 3821Plus Modem3-30 February 1998 3821-A2-GB20-30Line DialerThe Line Dialer configuration options establishparameters used by the modem to an

SDCP Menus3-313821-A2-GB20-30 February 1998 Table 3-6(2 of 4)Line Dialer Configuration OptionsBusyTone Detect: EnableNxt Enable DisableBusy Tone Dete

COMSPHERE 3821Plus Modem3-32 February 1998 3821-A2-GB20-30Table 3-6(3 of 4)Line Dialer Configuration OptionsLong Space Disc: EnableNxt Enable DisableL

SDCP Menus3-333821-A2-GB20-30 February 1998 Table 3-6(4 of 4)Line Dialer Configuration OptionsNoDataDiscTrig: TXD and RXDNxt TXD and RXD TXD Only

COMSPHERE 3821Plus Modem3-34 February 1998 3821-A2-GB20-30Dial LineThe Dial Line configuration options are used toconfigure the modem for operation ov

SDCP Menus3-353821-A2-GB20-30 February 1998 Table 3-7(2 of 3)Dial Line Configuration OptionsAutomode: EnableNxt Enable Disable System 85Automode. A

COMSPHERE 3821Plus Modem3-36 February 1998 3821-A2-GB20-30Table 3-7(3 of 3)Dial Line Configuration OptionsV22b Guard Tone: DisableNxt Disable 550Hz 18

COMSPHERE 3821Plus ModemE February 1998 3821-A2-GB20-30CanadaNotice to Users of the Canadian Public Switched Telephone NetworkThe Canadian Department

SDCP Menus3-373821-A2-GB20-30 February 1998 Leased LineThe Leased Line configuration options are used toconfigure the modem for operation over leased

COMSPHERE 3821Plus Modem3-38 February 1998 3821-A2-GB20-30Table 3-8(2 of 2)Leased Line Configuration OptionsAutorate: EnableNxt Enable DisableAutorate

SDCP Menus3-393821-A2-GB20-30 February 1998 V.42/MNP/BufferV.42/MNP/Buffer configuration options determine thetype of error correction and flow contr

COMSPHERE 3821Plus Modem3-40 February 1998 3821-A2-GB20-30Table 3-9(2 of 5)V.42/MNP/Buffer Configuration OptionsV42bis Compress: EnableNxt Enable

SDCP Menus3-413821-A2-GB20-30 February 1998 Table 3-9(3 of 5)V.42/MNP/Buffer Configuration OptionsFlw Cntl of DTE: CTS_to_DTENxt CTS_to_DTE Disable X

COMSPHERE 3821Plus Modem3-42 February 1998 3821-A2-GB20-30Table 3-9(4 of 5)V.42/MNP/Buffer Configuration OptionsMdm/Mdm FlowCtl: DisableNxt Disable En

SDCP Menus3-433821-A2-GB20-30 February 1998 Table 3-9(5 of 5)V.42/MNP/Buffer Configuration OptionsTXBuffDiscDelay: 10secNxt 10sec Disable 60se

COMSPHERE 3821Plus Modem3-44 February 1998 3821-A2-GB20-30TestThe Test configuration options determine specifics,such as the duration of a test, for t

SDCP Menus3-453821-A2-GB20-30 February 1998 MiscThe Miscellaneous configuration options determinespecifics for various functions, including networkma

COMSPHERE 3821Plus Modem3-46 February 1998 3821-A2-GB20-30Table 3-11(2 of 2)Miscellaneous Configuration OptionsNetMngmtAddress: 256Nxt  256Network

Safety InstructionsF3821-A2-GB20-30 February 1998This modem is suitable for connection to BT circuits with signalling at a nominal frequency of 2280 H

SDCP Menus3-473821-A2-GB20-30 February 1998 Security Configuration Options The Security configuration options group is describedin Chapter 7, Securit

COMSPHERE 3821Plus Modem3-48 February 1998 3821-A2-GB20-30Download CodeThe Download Code function allows firmware to beloaded into a modem from anothe

SDCP Menus3-493821-A2-GB20-30 February 1998 Automatic FirmwareDownloadNew releases may be available for the 3821Plusmodem. The latest 3821Plus firmwa

4-13821-A2-GB20-30 February 1998 AT Commands and S-RegistersOverview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus Modem4-2 February 1998 3821-A2-GB20-30To enter online Command mode while in Data mode,enter the following sequence:TYPE: +++Use the

AT Commands and S-Registers4-33821-A2-GB20-30 February 1998 Table 4-1(1 of 13)3821Plus AT Commands*** – AT Command Recovery ModeAllows the modem to r

COMSPHERE 3821Plus Modem4-4 February 1998 3821-A2-GB20-30Table 4-1(2 of 13)3821Plus AT CommandsDn, continuedR – Reverse Dial mode. Causes the originat

AT Commands and S-Registers4-53821-A2-GB20-30 February 1998 Table 4-1(3 of 13)3821Plus AT CommandsP – Pulse DialSets the modem for Pulse Dial mode. S

COMSPHERE 3821Plus Modem4-6 February 1998 3821-A2-GB20-30Table 4-1(4 of 13)3821Plus AT CommandsXn– Extended Result Codes,Dial Tone Detect,and Busy Ton

AT Commands and S-Registers4-73821-A2-GB20-30 February 1998 Table 4-1(5 of 13)3821Plus AT Commands″F – Clear Error BufferClears the buffer where info

i3821-A2-GB20-30 February 1998Table of ContentsPrefaceObjectives and Reader Assumptions v. . . . . . . . . . . . . . . . . . . . . . . . . How to Use

COMSPHERE 3821Plus Modem4-8 February 1998 3821-A2-GB20-30Table 4-1(6 of 13)3821Plus AT Commands&Dn – DTR ActionData Terminal Ready (DTR) is a sign

AT Commands and S-Registers4-93821-A2-GB20-30 February 1998 Table 4-1(7 of 13)3821Plus AT Commands&In – Dial Transmit Level for Cellular AutoWhen

COMSPHERE 3821Plus Modem4-10 February 1998 3821-A2-GB20-30Table 4-1(8 of 13)3821Plus AT Commands&Mn or &Qn – Async/Sync Mode and DTE Dialer Ty

AT Commands and S-Registers4-113821-A2-GB20-30 February 1998 Table 4-1(9 of 13)3821Plus AT Commands&Sn – DSR Control Data Set Ready (DSR) is a si

COMSPHERE 3821Plus Modem4-12 February 1998 3821-A2-GB20-30Table 4-1(10 of 13)3821Plus AT Commands&Xn – Transmit Clock SourceDetermines the source

AT Commands and S-Registers4-133821-A2-GB20-30 February 1998 Table 4-1(11 of 13)3821Plus AT Commands%Cn – MNP5 Data CompressionDetermines if the mode

COMSPHERE 3821Plus Modem4-14 February 1998 3821-A2-GB20-30Table 4-1(12 of 13)3821Plus AT Commands\Kn – Buffer Control, Send Break Control, Break Force

AT Commands and S-Registers4-153821-A2-GB20-30 February 1998 Table 4-1(13 of 13)3821Plus AT Commands\ –

COMSPHERE 3821Plus Modem4-16 February 1998 3821-A2-GB20-30S-Register ListS-registers affect the operating parameters of the3821Plus modem. These regis

AT Commands and S-Registers4-173821-A2-GB20-30 February 1998 Table 4-2(2 of 10)3821Plus S-RegistersS4 – Line Feed CharacterDetermines ASCII value use

COMSPHERE 3821Plus Modemii February 1998 3821-A2-GB20-304. AT Commands and S-RegistersOverview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3821Plus Modem4-18 February 1998 3821-A2-GB20-30Table 4-2(3 of 10)3821Plus S-RegistersS14 – Asymmetric Rate ModeRegister determines whether

AT Commands and S-Registers4-193821-A2-GB20-30 February 1998 Table 4-2(4 of 10)3821Plus S-RegistersS41 – Dial-Line RateDetermines the modem’s highest

COMSPHERE 3821Plus Modem4-20 February 1998 3821-A2-GB20-30Table 4-2(5 of 10)3821Plus S-RegistersS44 – Leased Line RateDetermines the modem’s highest d

AT Commands and S-Registers4-213821-A2-GB20-30 February 1998 Table 4-2(6 of 10)3821Plus S-RegistersS49 – Transmit Buffer Disconnect DelayDetermines t

COMSPHERE 3821Plus Modem4-22 February 1998 3821-A2-GB20-30Table 4-2(7 of 10)3821Plus S-RegistersS63 – V.25bis Idle CharacterIdentifies to the modem th

AT Commands and S-Registers4-233821-A2-GB20-30 February 1998 Table 4-2(8 of 10)3821Plus S-RegistersS76 – Autorate (Dial Line)Determines if the Autora

COMSPHERE 3821Plus Modem4-24 February 1998 3821-A2-GB20-30Table 4-2(9 of 10)3821Plus S-RegistersS84 – AT Command ModeDetermines how the modem responds

AT Commands and S-Registers4-253821-A2-GB20-30 February 1998 Table 4-2(10 of 10)3821Plus S-RegistersS91 – Cellular EnhancementValid only if ETC is in

COMSPHERE 3821Plus Modem4-26 February 1998 3821-A2-GB20-30Recovering AT CommandsCertain dialing methods, such as V.25bis andsynchronous operation, dis

AT Commands and S-Registers4-273821-A2-GB20-30 February 1998 Initialization StringsAn initialization string contains several AT commandsthat are ente