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Black Box Mini-Modem V.92 MD1626A, Руководство пользователя

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9. Troubleshooting

9.1 Possible Problems 

Your modem was thoroughly tested at the factory before it was shipped. If you are
unable to make a successful connection, or if you experience data loss or garbled
characters during your connection, it is possible that the modem is defective.
However, it is more likely that the source of your problem lies elsewhere.
The following symptoms are typical of problems you might encounter:

• None of the LEDs light when the modem is on.

• The modem does not respond to commands.

• The modem cannot connect when dialing.

• The modem disconnects while on-line.

• The modem cannot connect when answering.

• File transfer is slower than it should be.

• Data is being lost.

• There are garbage characters on the monitor.

• The modem doesn’t work with Caller ID.

• Fax and data software can’t run at the same time.

If you experience problems, please check the following possibilities before calling
Tech Support (see Section 9.2).

9.1.1 N

ONE OF THE

I

NDICATORS

L

IGHT

When you turn on the modem, the LED indicators on the front panel should flash
briefly as the modem runs a self-test. If the LEDs remain off, the modem is
probably not receiving power.

✔

Make sure the modem’s power switch is on, especially if you normally turn
the modem on by turning on a power strip.

✔

If the modem is plugged into a power strip, make sure the power strip
is plugged in and its power switch is on.

CHAPTER 9: Troubleshooting

Содержание Mini-Modem V.92 MD1626A

Страница 1: ...e U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site...

Страница 2: ...ouraged to try to correct the interference by one of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment...

Страница 3: ...s Repairs to certified equipment should be made by an authorized maintenance facility in this case Black Box Any repairs or alterations made by the user to this equipment or equipment malfunctions may...

Страница 4: ...ephone company may make changes in its technical operations and procedures If any such changes affect the compatibility or use of this device the telephone company is required to give adequate notice...

Страница 5: ...omendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las instrucciones de operaci n Todo otro servicio deber ser referido a perso...

Страница 6: ...ineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean...

Страница 7: ...6 MINI MODEM V 92 EUROPEAN UNION DECLARATION OF CONFORMITY This equipment complies with the requirements of the European EMC Directive 89 336 EEC...

Страница 8: ...ds Macintosh is a registered trademark of Apple Computer Inc Windows and Windows NT are either registered trademarks or trademarks of Microsoft Corporation in the United States and or other countries...

Страница 9: ...ors 19 3 5 Step 4 Install the Modem Driver 19 3 5 1 Step By Step Instructions for Installing the Modem Driver 19 3 5 2 Removing an Old Modem Driver 20 3 6 Step 5 Configure the Mini Modem V 92 for Your...

Страница 10: ...of the Indicators Light 83 9 1 2 The Modem Does Not Respond to Commands 84 9 1 3 The Modem Cannot Connect When Dialing 86 9 1 4 The Modem Disconnects While Online 87 9 1 5 The Modem Cannot Connect Wh...

Страница 11: ...erencing Compliance FCC Class B Compression V 44 6 1 throughput V 42 bis 4 1 throughput MNP 5 2 1 throughput Diagnostics Power on self test local analog loop local digital loop remote digital loop Err...

Страница 12: ...to a V 92 server Interface TIA EIA RS 232C ITU T V 24 V 28 Lightning Protection FCC Part 68 A B surge Line Type Dial up or 2 wire leased Manual Control Power switch Maximum Speeds Uploads client to se...

Страница 13: ...4800 9600 19 200 38 400 57 600 115 200 and 230 400 bps Transmit Level 11 dBm North America varies by country setting Interface RS 232 Connectors 1 DB25 F RS 232C 2 RJ 11 phone jacks Temperature Tolera...

Страница 14: ...lass 2 1 fax commands With the modem you get intelligent features such as plug and play operation callback security and remote configuration In standard mode the modem can store up to four command lin...

Страница 15: ...g you need In addition to this manual we supply the modem an autosensing universal power supply 1 power cord 1 RJ 11 RJ 11 phone cable 1 DB9 female DB25 male cable 4 self adhesive plastic feet a regis...

Страница 16: ...id using a telephone during an electrical storm there is a risk of electrical shock from lightning Do not use a telephone in the vicinity of a gas leak 3 2 Step 1 Affix the Modem s Feet Optional The m...

Страница 17: ...odem reverse steps 1 through 5 3 3 2 CHANGING THE DIAL UP LEASED LINE JUMPERS As shipped from the factory your modem is configured for normal dial up operation That is the modem must dial a phone numb...

Страница 18: ...ial port to the telephone line or leased line to AC power and optionally to your telephone Figure 3 3 Making the proper connections 3 4 1 RS 232 CONNECTION Plug one end of the serial cable into the RS...

Страница 19: ...ck or terminals NOTE Before you can use the modem on a leased line you must first change the internal jumpers See Section 3 3 3 4 4 TELEPHONE CONNECTION If you want to connect a telephone to the same...

Страница 20: ...ing an electrical storm it is safest to unplug your computer equipment from both the power outlet and the telephone line 3 5 Step 4 Install the Modem Driver If you use Windows 95 or above you must ins...

Страница 21: ...lications Though you can change the application connection descriptions one at a time it is easier to force Windows applications to use the new modem by removing the old modem driver from Windows 1 Cl...

Страница 22: ...ard searches for your modem and identifies it 5 Click Next 6 Select the country in which the modem will be used and then click Next 7 Review your choice of country If it is correct click Next to confi...

Страница 23: ...menu that lets you select your modem In Windows Terminal select Settings Modem Commands in HyperTerminal select File Properties Phone Number and in PhoneTools select Configure General Configuration C...

Страница 24: ...d DTE bps or baud rate Ideally if you use data compression you should set your serial port baud rate to four times the modem s maximum transmission speed or faster however few files can be compressed...

Страница 25: ...program s documentation 4 1 Front Panel Indicators Figure 4 1 Front panel The Mini Modem V 92 has 10 LED indicators on the front panel which indicate status configuration and activity TR Transmit Data...

Страница 26: ...ds no speed indicator lights during the connection OH Off Hook The OH indicator lights when the modem is off hook which occurs when the modem is dialing on line or answering a call The LED flashes whe...

Страница 27: ...ions of the modem s AT commands 4 3 PhoneTools Features Using the PhoneTools communications program included with your modem you can Upload and download data files Send faxes at preset times Store inc...

Страница 28: ...as not yet been configured for leased line operation you may turn off the local modem until the remote one is ready 4 Leased line setup is complete 4 4 2 OPERATING DISTANCES American Wire Gauge AWG Da...

Страница 29: ...note that this requires connection to a V 92 capable server Also please note that since upload speeds are affected by line conditions meeting the previous requirements cannot guarantee speeds above 33...

Страница 30: ...should also provide you with the following information E mail or POP mail address POP server address Mail or SMTP address News or NNT server address 4 7 Dial Up Networking Before you can connect to th...

Страница 31: ...aphic editor or spreadsheet To fax the document keep the document open and select the Print command from the File menu 3 Select CAPTURE FAX BVRP as the printer driver and then click OK The Send Fax wi...

Страница 32: ...return to data mode from on line command mode you must issue the command ATO To send AT commands to the modem you must use a communications program such as HyperTerminal or PhoneTools You can issue co...

Страница 33: ...it is turned on or reset or when your communications software calls another modem 5 1 AT Commands Command AT Attention Code Values n a Description The attention code precedes all command lines except...

Страница 34: ...ct tone dialing until a P is encountered Affects current and subsequent dialing W Wait for a new dial tone before continuing to dial X2 X4 X5 X6 or X7 must be selected Pause during dialing for time se...

Страница 35: ...ne data character echo included for backward compatibility with some software Command Hn Hook Control Values n 0 or 1 Default 0 Description H0 Goes on hook hangs up H1 Goes off hook makes the phone li...

Страница 36: ...aling Command Nn Modulation Handshake Values n 0 or 1 Default 1 Description N0 Modem performs handshake only at communication standard specified by S37 and the B command N1 Modem begins handshake at c...

Страница 37: ...lays it in 3 digit decimal form For example S2 gives the response 043 Command T Tone Dialing Values P T Default T Description Configures the modem for DTMF touchtone dialing Dialed digits are tone dia...

Страница 38: ...t codes with NO DIALTONE and BUSY X5 Extended result codes with NO DIALTONE and BUSY X6 Extended result codes with NO DIALTONE and BUSY X7 Basic result codes with NO DIALTONE and BUSY Command Zn Modem...

Страница 39: ...acing Control Values n 12 or 13 Default 12 Description E12 Disables XON XOFF pacing E13 Enables XON XOFF pacing K4 must also be set E13 has no effect if hardware control K3 is selected Command Fn Load...

Страница 40: ...only during a connection Command Tn V 54 Test Commands Values n 0 1 3 or 6 Default None Description T0 Abort Stops any test in progress T1 Initiates local analog loopback test T3 Initiates local digi...

Страница 41: ...scription A0 64 character maximum A1 128 character maximum A2 192 character maximum A3 256 character maximum Command Bn Transmit Break Values n 0 9 in 100 ms units Default 3 Description In non error c...

Страница 42: ...he computer in sequence with the received data K5 Same as K4 On line command mode The modem receives a Bn command from the computer K0 Clears data buffers and sends break to the remote modem K1 Same a...

Страница 43: ...ets the time in minutes that the modem waits after the last character is sent or received before it disconnects A value of zero disables the timer Applies only in buffer mode You can also set the inac...

Страница 44: ...tones and FAX when it detects fax tones These strings are used by some servers to select the appropriate communication program A0 Disables adaptive answer result codes A1 Enables adaptive answer resul...

Страница 45: ...cter Command Rn Cisco Configuration Values n 0 1 Default 0 Description R0 Disables Cisco configuration R1 Sets E0 Q1 D0 N0 SB9600 and S1 for operation with a Cisco router Command Sn Command Speed Resp...

Страница 46: ...15 200 bps SB230400 Set serial port to 230 400 bps Command DCS x y Select V 44 Data Compression Values x 0 or 1 V 42 bis y 0 1 or 2 V 44 Default 1 2 Description Selects V 42 bis V 44 data compression...

Страница 47: ...DR Displays the allowed values DR Displays the current value DR NONE Data compression not in use DR V42B V 42 bis is in use in both directions DR V44 V 44 is in use in both directions Command DS44 n...

Страница 48: ...s_rx max_string_tx max_string_rx max_history_tx max_history_rx Example DS44 3 0 0 1024 1024 255 255 5120 4096 Subparameters direction Specifies the DTE direction of the data compression 0 No compressi...

Страница 49: ...mum length of the history buffer to be negotiated in the receive direction 4096 Default 512 11008 History buffer size in receive direction Command ES n Enable Synchronous Buffered Mode Values n 6 Defa...

Страница 50: ...rs and must be inserted to skip a subparameter Example MS 0 CR disables automode and keeps all other settings at their current values MS Reports supported options in the format list of supported mod v...

Страница 51: ...4 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9600 7200 4800 or 2400 V32B V 32 bis 14 400 12 000 9600 7200 or 4800 V32 V 32 9600 or 4800 V22B V 22 bis 2400 or 1200 V22 V 22 1...

Страница 52: ...hest rate to be 33 600 bps 0 Maximum rate determined by the modulation selected in mod default 300 33600 Maximum rate value limited by the modulation selected in mod For valid max_rate values for each...

Страница 53: ...lays the allowed values PCW Displays the current value Command PIG n PCM Upstream Ignore Values n 0 or 1 Default 1 Description Controls the use of PCM upstream during V 92 operation PCM upstream allow...

Страница 54: ...ERROR will be returned PMHR 0 Deny MOH request PMHR 1 Grant MOH request with 10 second timeout PMHR 2 Grant MOH request with 20 second timeout PMHR 3 Grant MOH request with 30 second timeout PMHR 4 G...

Страница 55: ...minute timeout PMHT 13 Grant MOH request with indefinite timeout PMHT Displays the allowed values PMHT Displays the current value Command PQC n Quick Connect Control Values n 0 1 2 or 3 Default 3 Des...

Страница 56: ...ption y 0 255 Minimum ring interval in 100 ms units See description Default 0 0 Description Enables reporting of ring cadence information to the DTE and specifies the minimum ring cadence that will be...

Страница 57: ...em waits before calling back the remote modem Command CBF Callback Failed Attempts Display Values n a Default n a Description Requests the number of failed callback passwords since reset or power up T...

Страница 58: ...password and phone number in the y memory location Command CBSn Callback Enable Disable Values n 0 1 2 or 3 Default 0 Description CBS0 Disables callback security CBS1 Enables local and remote callback...

Страница 59: ...s Certain modem values or parameters are stored in memory locations called S registers Use the S command to read or to alter the contents of S registers see Section 5 1 Register Unit Range Default Des...

Страница 60: ...e the modem disconnects S11 1 ms 50 150 95 Sets spacing and duration of dialing tones These values may be different outside North America S18 50 ms 0 255 20 Sets the time the CD signal drops before go...

Страница 61: ...wnstream speed at which the modem attempts to connect The default maximum speed is 56 kbps When using V 34 or V 32 client to client connections in poor conditions setting S38 0 may result in better pe...

Страница 62: ...8 7 Enables 7 or disables 128 LAPM negotiation The following table lists the S36 and S48 configuration settings for certain types of connections S48 7 S48 128 S36 0 2 LAPM or hangup Do not use S36 1 3...

Страница 63: ...ommand Bit 56K mode 0 Reserved always 0 1 Enable V 90 2 Enable quick connect phase 1 3 Enable PCM upstream 4 Enable V 92 5 Enable quick connect phase 2 5 3 Result Codes In command mode your modem can...

Страница 64: ...6 000 bps 56K rate 73 CONNECT 38000 Connected at 38 000 bps 56K rate 74 CONNECT 40000 Connected at 40 000 bps 56K rate 75 CONNECT 42000 Connected at 42 000 bps 56K rate 76 CONNECT 44000 Connected at 4...

Страница 65: ...e Mini Modem V 92 2 Send three remote configuration escape characters followed by AT and the setup password and press ENTER Example ATMTSMODEM You have four tries to enter the correct password before...

Страница 66: ...s or exit the data communications program The next time you wish to set up the modem you must use the new password TO CHANGE THE REMOTE ESCAPE CHARACTER To further improve security you can change a re...

Страница 67: ...nsion at the callback number or to make a direct connection without callback For local security the passwords and dialing strings that are stored in the modem are protected from tampering by a setup p...

Страница 68: ...rd and press ENTER The modem responds with OK if the setup password is correct and ERROR if it is wrong 3 Type one of the following commands To turn off callback security type AT CBS0 and press ENTER...

Страница 69: ...0 To change the modem s prompt messages to use even parity type AT CBP2 and press ENTER For odd parity type AT CBP1 and press ENTER 4 To store the new parity value type AT W and press ENTER 7 1 4 TO A...

Страница 70: ...st be used with the command Add if you want a caller to be able to enter an extension number for callback The number of characters should equal the number of digits in the extension 8 To store a callb...

Страница 71: ...reappears Password 7 Type the same password that you used to initiate the call You have three attempts to enter the password or be disconnected 8 If the password is valid the following message appear...

Страница 72: ...ion entry callback 1 Using a data communications program such as HyperTerminal or PhoneTools dial the number of the callback modem 2 When the connection is established the callback modem responds with...

Страница 73: ...n OK Connecting NOTE You can make all calls direct connect regardless of whether the password or phone number has the character by using the H1 command 7 3 Callback Security Commands The following AT...

Страница 74: ...nly after the setup password has been entered and callback security enabled Command CBIn Local Callback Inactivity Timer Values n 1 255 Default 20 Description Sets the time in minutes that the modem w...

Страница 75: ...tion Enables or disables callback security options When callback security is enabled phone number memory locations 0 4 used for quick dialing and DTR dialing become unavailable and are replaced by cal...

Страница 76: ...dem is reset This command can be used only after the setup password has been entered Command Sx Enter Setup Password Values x password 1 8 characters case sensitive Default MTSMODEM Description Enters...

Страница 77: ...second character in the command string Direct connection Enables the caller to choose a direct connection no callback during password entry The character must be the first or second character in the c...

Страница 78: ...77 CHAPTER 7 Callback Security CALLBACK ASSIGNMENTS FORM Location Password Telephone Number 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29...

Страница 79: ...e is controlled by your ISP NOTE MTMoh the Modem on Hold program included with your modem currently supports only Windows 95 98 Me Future versions are expected to support Windows NT Windows 2000 and W...

Страница 80: ...licking the MTMoh icon Use the V 92 Modem on Hold Settings dialog box to configure Modem on Hold operations Figure 8 3 V 92 Modem on Hold settings dialog box Disable Modem on Hold Select if you do not...

Страница 81: ...ned 8 3 Check Modem Status The Call Status dialog box opens automatically when you receive a call If you close it you can reopen it by selecting this command The Call Status dialog box displays inform...

Страница 82: ...odem must be connected to a remote server that supports V 92 and Modem on Hold 8 5 Answering a Voice Call When Modem on Hold is enabled the Call Status dialog box appears on your screen whenever you h...

Страница 83: ...dem will remain on hold before it automatically disconnects Figure 8 6 Ignore the incoming call screen 8 6 Resuming a Data Call You can complete a voice call at any time and resume your on line connec...

Страница 84: ...t connect when answering File transfer is slower than it should be Data is being lost There are garbage characters on the monitor The modem doesn t work with Caller ID Fax and data software can t run...

Страница 85: ...ion software either manually in terminal mode or automatically by configuring the software You cannot send commands to the modem from the DOS prompt Make sure you are in terminal mode in your data com...

Страница 86: ...Manager tab double click on Ports then double click on the communication port your modem is connected to In the port s Properties sheet click on the Resources tab to see the port s input output range...

Страница 87: ...building s telephone installation To test the building installation plug a telephone into your modem s telephone wall jack and listen for a dial tone If you hear a dial tone your modem might be insta...

Страница 88: ...ient connections in poor conditions setting S38 0 may result in better performance 9 1 4 THE MODEM DISCONNECTS WHILE ONLINE If you are not using Modem on Hold Call Waiting can interrupt your connectio...

Страница 89: ...s to resend many blocks of data to ensure accuracy You must have a clean line for maximum speed Are you downloading a compressed file with MNP 5 hardware compression enabled Since hardware data compre...

Страница 90: ...in you might get a better connection the second time At speeds above 2400 bps the remote modem might not use the same transmission or error correction standards as your modem Try connecting at a slowe...

Страница 91: ...port at 724 746 5500 Before you do make a record of the history of the problem We will be able to provide more efficient and accurate assistance if you have a complete description including the nature...

Страница 92: ...smitter and receiver circuits are functioning properly The remote digital loopback test allows you to verify that the local computer or terminal the serial ports the local and remote modems and the tr...

Страница 93: ...n on line command mode Then type either AT T or ATH to return to command mode 6 Your modem passes this test if the data received on your monitor are the same as the data entered from your keyboard If...

Страница 94: ...rd For this test typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeroes Data received by the remote modem enters its analog receiver is conv...

Страница 95: ...te modem and establish your on line connection 3 Type the escape sequence AT and press ENTER to bring your modem into on line command mode 4 Type AT T3 and press ENTER Once you receive an OK message f...

Страница 96: ...The modem should respond with an OK message If you wish to stay on line with the remote modem for normal data transmission type AT T and press ENTER to exit the test then type ATO and press ENTER to r...

Страница 97: ...t SETUP This section describes how to make sure Linux can talk to the modem and be able to dial up to the Internet Linux can use different programs and desktops depending on who made the Linux operati...

Страница 98: ...nfiguration Tool 4 Select Add and then click Next 5 Enter the connection name and phone number and then click Next 6 Enter your user name and password and then click Next 7 Select Normal ISP if your I...

Страница 99: ...o do this see Section 3 6 STEP 2 CONFIGURE FOR CALLBACK SECURITY IN DIRECT CONNECT MODE Callback security requires a caller to give a correct password before sending data to the system If you do not p...

Страница 100: ...r your modem is no parity AT CBP0 To change the modem s prompt messages to use even parity type AT CBP2 and press ENTER For odd parity type AT CBP1 and press ENTER 2 To store the new parity value type...

Страница 101: ...nd sets the following functions E0 Turns command echo off Q1 Turns result codes off D0 Ignores DTR from the DTE K0 Selects no flow control SB9600 Sets the serial baud rate to 9600 bps S1 Disables comm...

Страница 102: ...RCV 6 3 3 3 RCV DSR 7 2 4 6 DSR CTS 8 1 7 5 CTS C 3 Remote Configuration The configuration of the modem described in Step 3 of Section C 1 contains the core settings that allow the modem to function p...

Страница 103: ...ho off and result codes off it may be difficult to determine if the remote modem is responding to commands The ATI command can be used for this purpose Even with echo and result codes off the modem wi...

Страница 104: ...4 52 Czech Republic AT T19 0 25 37 Denmark AT T19 0 34 52 Finland AT T19 0 34 52 France AT T19 0 34 52 Germany AT T19 0 34 52 Greece AT T19 0 34 52 Hong Kong AT T19 0 30 48 Hungary AT T19 0 30 48 Icel...

Страница 105: ...T19 0 30 48 Portugal AT T19 0 34 52 Russia AT T19 0 34 52 Singapore AT T19 0 30 48 South Africa AT T19 0 35 53 Slovak Republic AT T19 0 34 52 Slovenia AT T19 0 30 48 Spain AT T19 0 34 52 Sweden AT T1...

Страница 106: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 2002 Black Box Corporation All rights reserved...

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