Black Box Modem MD885A-R3 Manual de usuario

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92.0 Quick Start • If you are operating the Modem in a manual dial mode, you also needa standard telephone set.2.1.4 CONNECTIONSFigure 2-1 shows how

995.0 Hayes Emulation ModeTable 5-1 (continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATIONY Long-Space Disconnect*Y0 Disables long-spac

100Modem 34336Table 5-1 (continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATION&J Modem displays OK result code; command has no othe

1015.0 Hayes Emulation ModeTable 5-1 (continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATION&T Test Commands &T0 Terminates a

102Modem 34336Table 5-1 (continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATION&Z Store Telephone NumberParameters are 0-9 (availab

1035.0 Hayes Emulation ModeTable 5-1(continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATION\N V.42 Mode * 1 \N0 Disables error correct

104Modem 34336Table 5-2. Hayes Mode Result Codes.DIGIT CODE WORD CODE MEANING0 OK Command line executed without errors. 1 CONNECT Carrier de

1055.0 Hayes Emulation ModeTable 5-2 (continued). Hayes Mode Result Codes.DIGIT CODE WORD CODE MEANING15 CONNECT 4800 Carrier detected at 4800 b

106Modem 34336Table 5-3. S Register Functions.(Only registers intended for user access are listed.)REGISTER RANGE UNITS DEFAULT DESCRIPTIONS0 0-255

1076.0 V.25 bis Autodialer6.0 V.25 bis AutodialerFor international compatibility, the Modem can function as a V.25 bisautodialer. In V.25 bis mode,

108Modem 34336DTR DIALING INV.25 BISMODEAn alternative to using the V.25bis CRS command to dial a stored number isto use the DTR dialing option. With

10Modem 34336For dialup applications:• Use the supplied two-conductor crossover cable to connect the Modemto the telephone-line modular wall jack. Pl

1096.0 V.25 bis Autodialer• DIC — Disregard Incoming Call. The DIC command instructs theautodialer not to answer an incoming call. The DIC command i

Table 6-1. V.25 bis Autodialer Commands.COMMAND FUNCTIONCIC Connect incoming call. CRN n Call request—dial number (n) entered on DTE keyboard.

1116.0 V.25 bis AutodialerTable 6-2. V.25 bis Dialing Parameters.(Table also applies to Dumb mode and Bell 208 operation)Characters that can be dial

6.3 Dialing ParametersTable 6-2 lists dialing parameters you can use with the CRN commandto modify dialing operations.6.4 V.25 bis Result CodesTable 6

1137.0 Diagnostics7.0 DiagnosticsThe troubleshooting information in this chapter applies to all Modemapplications (all dialup and leased line modes),

114Modem 343367.3 Physical InspectionThe next step in isolating a defective component is inspecting the system.If you can trace the problem to a speci

1157.0 Diagnostics7.5 How to Select and Activate Tests7.5.1 FRONT-PANELCONTROLTests are accessed and activated in the same way options are selected:

116Modem 34336D = Dial line occupiedR = Ringing (R appears in same position as D.)S = Connection secured by security handshake (S appears in same posi

1177.0 DiagnosticsThe RX value is the local receive level of the incoming signal. The receivelevel range of measurement is from 0 to -43 dBm in 1.5-

118Modem 343367.7 Local Modem Diagnostics Local modem diagnostics are for testing the Modem and its adjoining system.The tests are accessed from the

112.0 Quick Start 2.2 Front-Panel LCD and ControlsTo select a Quick Setup configuration, you will need to use the pushbuttonsand liquid-crystal displ

1197.0 DiagnosticsIn Hayes emulation mode only, initiate the ALB test using the command &T1(preceded by AT). In any mode, initiate the ALB test u

120Modem 34336Figure 7-2. Analog Loopback Self-Test (ALBST).The SELFTEST screen is displayed, with ON and OFF as the possibleselections. Select ON to

1217.0 DiagnosticsTo run the test, go to the LCD MAIN MENU. From page 2 of the LCD MAINMENU, select TEST. This takes you to screen 1 of the LOCAL TES

122Modem 34336NOTEThe ALBX test may result in errors or may fail altogether even whereconditions are satisfactory for normal operation. The test chan

1237.0 Diagnostics7.7.5 EXTERNALANALOGLOOPBACKSELF-TEST(ALXST)The external analog loopback self-test is available for 4-wire leased line modeonly.Th

124Modem 34336To initiate the ALXST, use the Modem’s front-panel controls to go to theLCD MAIN MENU. From page 2 of the LCD MAIN MENU, select TEST. G

1257.0 DiagnosticsFigure 7-5. Digital Loopback Test (DLB).The DIGITAL LOOPBACK screen is displayed, with ON and OFF as thepossible selections. Selec

126Modem 343367.8 Remote Modem DiagnosticsThe Modem performs two tests on compatible remote modems: remotedigital loopback (RDL) and remote digital lo

1277.0 DiagnosticsFrom page 2 of the MAIN MENU, select RMT. Then select TEST. From the REMOTE TEST menu, select RDL.From the REMOTE DIGIT LOOP scree

128Modem 34336Figure 7-7. Remote Digital Loopback Self Test.PATTERNGENERATORPATTERNDETECTORTRANSMITTERRECEIVERTRANSMITTERRECEIVERLOCAL MODEMREMOTE MO

12Modem 343362.2.2 EIA STATUSSCREENThe EIA status screen indicates the operational status of the Modem as wellas the condition of certain EIA RS-232

129APPENDIX A: DB25 Pin AssignmentsAppendix A: DB25 Pin AssignmentsDesig- LCDPin nation Function Indicator Source1 AA Frame ground—not connected2 BA

130Modem 34336Appendix B: Quick Setup ConfigurationsTable B-1 shows the complete default configuration for each of the QuickSetup modes. When you sele

131APPENDIX B: Quick Setup ConfigurationsTable B-1 (continued). Quick Setup Configurations.Default Settings Listed by Mode or Type of OperationV.25 b

132Modem 34336Table B-1 (continued). Quick Setup Configurations.Default Settings Listed by Mode or Type of OperationV.25 bis 2-WIRE 4-WIRE BELLOPTION

133APPENDIX B: Quick Setup ConfigurationsTable B-1 (continued). Quick Setup Configurations.Default Settings Listed by Mode or Type of OperationV.25 b

134Modem 34336Table B-1 (continued). Quick Setup Configurations.Notes:1V.25 bis synchronous configurations (character- and bit-oriented) are the same

135APPENDIX C: Summary SetupAppendix C: Summary SetupC.1 Introduction to Summary SetupSummary Setup is designed to allow experienced users to quickl

The AT PROFILES screenallows you to access andchange the Hayes mode userprofiles (profile 0 and profile 1).136Modem 34336The SETUPS screenallows you t

137Appendix C: Summary SetupC.2 SETUPS ScreenOnly part of the SETUPS screen can bedisplayed at any one time. The full screenis displayed below next

138Modem 34336Primary Options:addr999 999Group Unitaddress addressFigure C-2. How to move the cursor in the SETUPS screen using the pushbuttons.Dial

132.0 Quick Start 2.3 Quick SetupTo set up the Modem for immediate use (or to quickly change the modem’sconfiguration for an alternate mode of operat

139Appendix C: Summary SetupV.42 ERROR CORRECTION OPTION:NOTE“V42 <1>” and “V42 <2>” are displayed to help indicate the relativepositions

140Modem 34336DATA PUMP OPTIONS:NOTE“pump1” and “pump2” are displayed to help indicate the relativepositions of individual options across the LCD.pump

141Appendix C: Summary SetupMISCELLANEOUS OPTIONS:NOTE“misc1” and “misc2” are displayed to help indicate the relative positionsof individual options

142Modem 34336C.3 AT PROFILES ScreenFrom the AT PROFILES screen you can select a Hayes mode configurationprofile (either 0 or 1). Only part of the pr

143Appendix C: Summary SetupC.4 S-REG ScreenThe S-REG screen may be used to read or change the value stored in an Sregister. For more information, s

144Modem 34336Appendix D: JumpersWARNINGJumpers should be switched only by qualified service personel.For most applications, there is no need to reset

145Appendix D: JumpersFigure D-1. Modem Circuit Board—Jumper Locations.JP7JP2JP3JP1JP6JP5JP4JP8

146Modem 34336Table D-1. Jumper Switch Functions.JUMPER(S) Pins 1 and 2 connected Pins 2 and 3 connectedJP1 Frame and signal Frame and signal ground

147NOM StatementNORMAS OFICIALES MEXICANAS (NOM)ELECTRICAL SAFETY STATEMENTINSTRUCCIONES DE SEGURIDAD1. Todas las instrucciones de seguridad y operaci

148Modem 3433610. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calorcomo radiadores, registros de calor, estufas u otros apar

14Modem 34336All options for each Quick Setup configuration are listed in Appendix B.If you want to customize your Quick Setup configuration, see 3.0,

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152.0 Quick Start Table 2-1 (continued). Available Quick Setup Configurations.QUICK SETUP <07> 2-WIRE LEASED-LINE ANSWER MODE—2-W LEASED (ANS

16Modem 343362.4 Basic OperationThis section provides basic information for each of the modem’s primaryoperating modes. If you encounter difficulty, r

172.0 Quick Start Dialing Mode. The default dialing mode is tone dialing. To change to pulsedialing, insert a P after AT D: AT DPTo change from puls

18Modem 34336For V.25 bis operation, the Modem must be configured to use the same dataprotocol as the attached DTE. V.25 bis mode operation and comman

1FCC InformationFEDERAL COMMUNICATIONS COMMISSIONANDINDUSTRY CANADARADIO FREQUENCY INTERFERENCE STATEMENTSThis equipment generates, uses, and can radi

192.0 Quick Start 2.4.3 2-WIREDIAL(DUMB) MODE(QUICKSETUP5)Dumb mode is used primarily for manual call origination, answer-onlyapplications, and in c

20Modem 34336Autodialing the Stored Number. To autodial the stored number fromthe EIA status screen, press the following pushbuttons in sequence:ENT P

212.0 Quick Start The following information applies to both 2-wire and 4-wire leased-lineoperation:• The modem must be configured for the correct lin

22Modem 343362.4.5 V.33 LEASED-LINEOPERATION(QUICKSETUP10)V.33 operation is available on the Modem at speeds of 12,000 and 14,400 bps.V.33 leased-line

232.0 Quick Start 2.4.7 4-WIRELEASEDLINEV.29 MODE(QUICKSETUP13)The 4-Wire Leased Line V.29 Mode configures the modem for V.29operation, for compatibi

24Modem 343362.4.8 V.29 FASTMASTER ANDSLAVEMODES(QUICKSETUPS14 AND15)In multidrop operation, the master modem transmits to all of the slave(remote) mo

252.0 Quick Start 2.5 Problem SolvingIf you encounter difficulties in setting up or using the modem, try theremedies described below. If you suspect

26Modem 34336NOTEThis page is intentionally left blank.

273.0 Modem Setup Options3.0 Modem Setup Options3.1 Methods For Selecting OptionsThe Modem allows you to easily select options for tailoring the mode

28Modem 343363.2 Selecting Options from the Front-Panel3.2.1 PUSHBUTTONS AND THELCDOptions are selected from the front panel by pressing the front pa

2Modem 34336Table of Contents1.0 Specifications ...62.0 Quick Start.

293.0 Modem Setup OptionsNOTEIf you have selected a Quick Setup or have changed certain optionssettings, pressing the ENT pushbutton to exit the SETU

30Modem 343362. Option-Selection Example. The following example illustrates optionselection. As you follow the steps below, refer to the LCD flow ch

313.0 Modem Setup OptionsPress pushbutton 3 to select SPKVOL(speaker volume). The SPEAKERVOLUME screen is shown right.The currently selected setting

32Modem 34336The default settings for each option are listed in Appendix B.The Quick Setup options (one for each operating mode) affect the entiremode

333.0 Modem Setup OptionsTable 3-1. Effect of Speed Limit Settings on Data RateMAX RATE DIALER SETTING, bps OPTION RESULTANT DATA RATE, bps L

34Modem 34336• V.32. The Modem normally uses the V.32 handshake. (The Modem alsouses this handshake for V.32/14,400 bps operation.)• V.33. V.33 oper

353.0 Modem Setup Options3.3.1 V.42 ERRORCORRECTIONOPTIONSThe Modem supports both CCITT V.42 error correction and MicrocomNetworking Protocol®(MNP®)

36Modem 34336The available error correction options are listed below:• V.42 Mode • DTE Speed • MNP Class (class limit) • DTE-DCE and DCE-DTE Flow• Bre

373.0 Modem Setup OptionsThe following two options are available through the V42 SELECTION screen: The Protocol option is available for Hayes, V.25 b

38Modem 34336The Buffer Mode/Speed Conversion option Hayes, V.25 bis, Dumb, Leasedline modes (except V.33). It enables or disables speed conversion (f

3Table of Contents3.3.1 V.42 Error Correction Options ...353.3.2 Dialer Mode ...

393.0 Modem Setup OptionsThe DTE-DCE Flow Control options are available for Hayes, V.25 bis, Dumb,and Leased-Line modes (except V.33).• NONE — No flo

40Modem 34336The Pass-Through Flow Control options are available for Hayes, V.25 bis, Dumb,and Leased-Line modes (except V.33). Pass-Through Flow Cont

413.0 Modem Setup OptionsThe V.25 bis Dialer Modes are available for V.25 bis mode.Any of the selections from the DIAL V25bis screen will enable the

42Modem 34336The Character Length option is available for all modes (asynchronousoperation only). It selects a character length of 8, 9, 10, or 11 bit

433.0 Modem Setup Options3.3.4 DISCONNECTOPTIONSWhen the modem is operating in V.25 bis or Dumb mode, it is necessary todisconnect the modem from the

44Modem 343363.3.5 TESTOPTIONSThe Test Options affect certain tests (as explained below) but do not activatetests.The DSR During Analog Loopback is av

453.0 Modem Setup OptionsNOTEThe Modem also supports a CTS option intended only for V.33and Bell 208A/B operation, described later in this chapter.T

46Modem 34336The Test Mode (TM to EIA) option is available for all modes. It controlspin 25, the test mode (TM) indicator, on the RS-232 interface con

473.0 Modem Setup OptionsThe Compromise Equalizers option is available for all modes.NOTEThe compromise equalizers affect only V.32 operation (4800 t

48Modem 34336Normally, as part of the V.32 handshake, the calling modem begins sendinga sequence to the answer modem while the answer modem is still s

4Modem 343364.10 Automatic Fallback ...764.10.1 Operating Mode Fallback ...

493.0 Modem Setup OptionsThe Speaker Volume option is available for all modes. It can be set to LOW,MEDIUM, or HIGH.The Guard Tones option is availab

50Modem 34336The CTS option is available for 4-wire Leased Line modes. It applies only to 4-wire leased line applications using constant carrier.• RT

513.0 Modem Setup OptionsThe Turnaround Delay option is available for 208 mode. It is intended forcircuits where echo is a problem. It prevents the

52Modem 34336• Enable — The Modem will check for X-ON/X-OFF (DC1/DC3)flow control characters received from the remote modem to determinewhether to sto

533.0 Modem Setup OptionsThe 208 Phase Detection option is for 208 mode. • Normal — Conditions the modem’s 208 receiver for normal modulationdetecti

54Modem 343364.0 General Operation and Special FeaturesThis chapter describes the following Modem features and operationalmodes (listed here in the or

554.0 General Operation and Special FeaturesIf a number has been previously stored, the number is displayed on the topline of the LCD (instead of das

56Modem 34336Table 4-1. Dialing Control Characters.Character FunctionA-D Used in some PBX applications (tone dialing only). L Links a phone number t

574.0 General Operation and Special Features4.3.1 AUTODIALBACKUPThe Modem automatically dials the stored number to connect over the backupline if it

58Modem 34336NOTEIf DIAL IF BAD >> (1, 2, 3 or 4) min is selected, the Select option settingof the answer unit must be equal to or less than the

5Table of Conents7.6 Diagnostic Monitoring: Status Screens ...1157.6.1 EIA Status Screen ...

594.0 General Operation and Special FeaturesRecovery from the front panel, enter the phone number to be dialed followedby /R (the Dial Line Auto-Reco

60Modem 343364.5.1 DIALING ASTOREDNUMBERDTR dialing allows you to set up the Modem to automatically dial a storednumber even when the autodialer is no

614.0 General Operation and Special Featuresplace the handset back on the cradle. The LCD displays the status of thecommunication. It appears as show

62Modem 343364.7 Modem Security OperationIn 2-Wire-Dial Hayes emulation mode only, the Modem can be configured toprovide security on incoming calls. R

634.0 General Operation and Special FeaturesThe modem’s security configuration for password protection is controlledfrom the DTE by a special set of

64Modem 34336Rules for using passwords and password commands are listed below.• Memory locations 0 and 2-9 may be used for storing phone numbers;locat

654.0 General Operation and Special Features2.Unlocking the &V and &Z commands. If an administrative password isimplemented, the Hayes compat

66Modem 34336NOTEPasswords may be stored only in memory locations 2 through 9.5.Programming a response to a correct password. Enter the followingcomm

674.0 General Operation and Special FeaturesControl Procedure (Modem-to-Modem)Enabling Modem-to-Modem Remote Control ModeTo remotely control a modem

68Modem 34336Remote control through a rack controller is an especially valuable capabilityfor modem used in high-density 16-slot enclosures. The low-p

6Modem 343361.0 SpecificationsAvailable Configurations — Stand-alone or rack-mountCompatibility — V.29 9600, 7200, 4800V.32 terbo 19.2 or 16.8 kbpsV.

694.0 General Operation and Special Features2. Enter the address or slot number—To enter the address or slot numberof the modem to be controlled, pre

70Modem 34336Figure 4-1. Remote control—address control mode.Modems in rack equppedwith rack controllerStandalone modemsModems in rack with orwithout

714.0 General Operation and Special Features4.9 Diagnostic Interface ControlThe diagnostic software built into the Modem supports a special set ofcom

72Modem 34336Table 4-3. Diagnostic Port Commands.COMMAND FUNCTIONCONNECT g,u Connect to diagnostic port of modem at group address g, unit address u.

734.0 General Operation and Special FeaturesA carriage return [CR] is required at the end of a command line exceptwhen the command line consists of o

74Modem 34336Table 4-4. Responses To Diagnostic Port Commands.RESPONSE MEANINGERROR Command error (incomplete, wrong syntax, etc.). (If CONNECT or C

754.0 General Operation and Special Features4.9.4 DTE DISPLAYSWhen Auto-Display is enabled, an update of the LCD is automaticallydisplayed on the DTE

76Modem 34336• If you want to disconnect from the diagnostic link without establishinga new link, issue the CONNECT command without an address.4.10 Au

774.0 General Operation and Special FeaturesChanging the Operating Mode Fallback parameter to 1 has the followingeffects:• The Modem is configured fo

78Modem 34336Table 4-6. V.22 bis/V.22/V.21/V.23 FALLBACK.MODE DESCRIPTIONV.22 bis 2400 bps asynchronous/ synchronousV.22 1200 and 600 bps asynchrono

71.0 Specifications V.29 QAM at 9600, 7200, and 4800 bpsV.27 8-phase DPSK at 4800 and 2400 bpsV.26 4-phase DPSK at 2400 and 1200 bpsV.23 FSK at 1200/

794.0 General Operation and Special FeaturesIf Rate Renegotiation Procedure (RRP) is enabled, the modem willautomatically fall back or fall forward t

80Modem 34336After you select UP or DOWN, the LCD will automatically switch to the EIAstatus screen so you can see the result of the rate-change reque

815.0 Hayes Emulation Mode5.0 Hayes Emulation ModeFor easy reference, the following tables appear consecutively at the end of thischapter:• Table 5-1

82Modem 34336• Command Sequence. For dialing, a command line begins with AT,followed by a D and the phone number. Other commands should beplaced befo

835.0 Hayes Emulation Mode• Dial Command Modifiers. Several modifiers can be used with thebasic D (dial) command to alter dialing operations. The mo

84Modem 343365.1.3 RESULTCODESResult codes (see Table 5-2) are messages sent by the modem to the DTEmonitor in response to your commands. Result code

855.0 Hayes Emulation ModeFor most commands, there are parameters—numerical values used withthe command specifying the function of the command. For e

86Modem 34336• H — Telephone Switch Hook. The H command (on-hook) is used toterminate a call. (On-hook corresponds to off-line.) H may also alternate

875.0 Hayes Emulation Mode• O — Forced On-Line. For asynchronous operation only. When themodem is on-line, you can return to the command state by ent

88Modem 34336• Z —Recall Stored User Profile. The Z command resets the modem andrecalls a profile of the modem configuration settings previously saved

8Modem 343362.0 Quick StartAll information in this manual applies to both the stand-alone and rack-mount versions of the Modem 34336.QUICKSETUPS FOR A

895.0 Hayes Emulation Mode• ! — Initiate Flash. The ! command causes the Modem to go on-hook for1/2 second. The command has the same effect as holdin

90Modem 34336Ring countWait time before blind dialingWait time for carrier/dial toneIn addition, the &W command does not save stored phone numbers

915.0 Hayes Emulation Mode5.3.1 READINGANDSETTINGREGISTERSUse the S command to read the value of a register or to change its value.To read the curren

92Modem 34336• S3 — Carriage Return. Register S3 is effective for asynchronous operationonly. Normally, the ASCII carriage-return value, 13, is used.

935.0 Hayes Emulation ModeIf the guard time is zero, timing is not a factor. The three escapecharacters can occur with any timing relationship, but t

94Modem 343365.4 Selecting Options In Hayes ModeIn Hayes mode, options may be selected by using one of the following:• AT commands (Table 5-1)• The fr

955.0 Hayes Emulation Mode• If profile 0 is recalled as the active configuration, the LCD screens reflectthe profile 0 configuration.• If profile 0 i

96Modem 34336Table 5-1. Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATIONA Quick AnswerNo parameters.A/ Repeat Previous CommandNo parameters.B B

975.0 Hayes Emulation ModeTable 5-1 (continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATIONI Product Code Or ChecksumI0 Requests product

98Modem 34336Table 5-1 (continued). Hayes Compatible Commands.COMMAND FUNCTION/EXPLANATIONS= Modify S RegisterParameters are register and value to b