NetComm InModem 56 Manuel utilisateur

Table of Contents.

System Requirements............................................................................................................2

Package inclusions.................................................................................................................2

Modem Installation .................................................................................................................2

Using Your Modem.................................................................................................................4

Troubleshooting......................................................................................................................5

Appendix A: AT Command Reference...................................................................................6

Appendix B: S-Registers......................................................................................................21

Appendix C: Modem Specifications .....................................................................................27

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System Requirements

•Computer with Pentium 166 MMX or higher processor.

•Windows 95/98, NT 4 or 2000 Operating System.

•Analogue Telephone line.

•1 available PCI slot.

•CD-ROM drive.

Package inclusions

•Modem.

•Telephone lead (RJ11-RJ11).

•Telephone lead adaptor (605 – RJ11).

•Quick Start Guide.

•NetComm CD.

•Warranty card.

•ISP (Internet Service Provider) CD.

Modem Installation

1. Turn off your computer and disconnect the power cable.

2. Remove the cover from your computer. Please check your computer’s manual for

instructions and cautions regarding the removal of covers or installation of add-in boards.

3. Select an empty PCI slot and remove the appropriate expansion slot cover from the

computer. 4.

Fig: Computer Internals

ISA SLOT

PCI SLOTRemoved

expansion

slot cover

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4. Insert the InModem 56 into the PCI slot and secure with a screw in the backplane.

5. Replace the Computers cover.

6. Insert one end of the telephone cord into the Modem’s Line (top) Socket

7. Connect the other end of the phone cord to a telephone phone point, via the supplied

adaptor (RJ11-605) if required.

8. Turn on your computer.

9. As Windows 95 or 98 starts (Windows NT 4 and 2000 users skip this instruction) it will

detect that new hardware has been added, and start the “Add New Hardware Wizard”

(Windows 9x only). Click on Cancel.

10.Insert the NetComm CD into your CD-ROM drive.

11.The CD should autostart, displaying the following window. If it does not start click on

Start – Run and type in D:\autorun.exe where D is the drive letter of your CD-ROM drive.

12.Select “Install Modem Driver”.

13.Click on OK to confirm the installation.

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14.As the drivers are being installed this Window will

be displayed.

15.Windows 95 and 98

Tthe Add New Hardware wizard pop up momentarily while the drivers are added and

then the above window will close automatically.

Windows 2000 – You will be informed that “Digital Signature Not Found”. Click on Yes

to complete the installation.

Windows NT 4 – After the drivers are installed you will be informed that you need to

Restart you computer before you can use your modem. Click OK to restart, or Cancel to

restart later.

Using Your Modem

Your modem is now ready to use. Included with your modem is the following software:

•Bitware Fax software that allows you to send and receive faxes directly from your PC. To

install Bitware click on the “Install Bitware Fax Software” link on the NetComm CD.

•ISP Software allows you to sign up with an ISP (Internet Service Provider) to connect to

the Internet.

Most Windows communications software will either auto detect your modem, or ask you

which modem you wish to use with it. Choose the NetComm InModem 56 (IN5692). If the

software asks you which COM port to use you can determine this by going to the Control

Panel – Modems – NetComm InModem 56 – Properties and the Port that the modem is

configured to (often COM 3) will be displayed.

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Troubleshooting

Problem:

The modem keeps disconnecting.

Resolution:

1. Turn off call waiting.

2. Disconnect all other telephone devices (telephone handsets, answering

machines, faxes, cordless phones) connected to the phone line.

3. Check for updated drivers on the NetComm Web site

http://www.netcomm.com.au

Problem:

The modem is reporting NO DIALTONE.

Resolution:

1. Check that the phone line is plugged into the modems LINE (not Phone) socket.

2. Check that no one else is using a phone that is connected to the same phone

line.

3. Go to Control Panel – Modems – NetComm InModem 56 – Properties –

Connection and remove the tick in the “Wait for dial tone before dialing”

checkbox.

Problem:

The modem is not responding.

Resolution:

1. Make sure that there are no other packages communicating with the modem. In

particular check that there are no fax packages running.

2. Check the System properties (Control Panel – System – Device Manager in

Windows 95 & 98) to make sure there are no system conflicts listed.

3. Try restarting your computer.

4. Go to Control Panel – Modems – Diagnostics and highlight the Com port listed

next to the NetComm InModem 56 and then click on “More Info”. If the modem is

responding you will be presented with a window with the modems responses to a

number of AT commands.

5. Try inserting the modem into a different PCI slot.

Problem:

The modem will not connect.

Resolution:

1. Try connecting to a different phone number.

2. Try connecting from a different phone line (if possible).

3. Disconnect all other telephone devices (telephone handsets, answering

machines, faxes, cordless phones) connected to the phone line.

Problem:

The modem won’t connect at 56k speeds.

Resolution:

1. The server you are dialing might not support 56k speeds.

2. Your phone line might not support 56k speeds.

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Appendix A: AT Command Reference

AT commands are issued to the modem to control the modem's operation and software

configuration. AT commands can only be entered while the modem is in command mode. The

format for entering AT commands is: TYPE: ATXn where X is the AT command and n is the

specific value for that command. PRESS: Enter If n is omitted from a command that takes a

parameter value, the value 0 I(zero) is assumed.

Any command issued is acknowledged with a response in either text or numeric values

known as result codes. Table 2 lists all the valid result codes.

In the following listing, all commands and command-values accepted by the modem are

shown; any entries other than those shown cause the ERROR result code.

+++ Escape sequence

The escape sequence allows the modem to exit data mode and enter on-line command

mode. While in on-line command mode, you may communicate directly to your modem using

AT commands. Once you are finished, you may return to data mode using the ATO

command. A pause, the length which is set by the Escape Guard Time (S12), must be used

before and after an escape sequence is issued. This pause prevents the modem from

interpreting the escape sequence as data.

The value of the escape sequence character may be changed using Register S2.

A/ Repeat Last Command

This command repeats the last command string entered. Do not precede this command with

an AT prefix or conclude it by pressing Enter.

A Answer Command

This command instructs the modem to go off-hook and answer an incoming call.

Bn Communication Standard Setting

This command determines CCITT vs. Bell standard.

B0: Selects CCITT V.22 mode when the modem is at 1200 bits/s.

B1: Selects Bell 212A when the modem is at 1200 bits/s (default).

B2: Unselects V23 reverse channel (same as B3 ).

B3: Unselects V23 reverse channel (same as B2 ).

B15: Selects V.21 when the modem is at 300 bits/s.

B16: Selects Bell 103J when the modem is at 300 bits/s (default).

Result Codes:

OK n = 0, 1, 2, 3, 15, 16

ERROR Otherwise

Cn Carrier Control

The modem will accept the C1 command without error in order to assure backward

compatibility with communications software that issues the C1 command. However, this

modem does not support the C0 command. The C0 command may instruct some other

modems not to send carrier (i.e., it puts them in a receive-only mode).

C0: Transmit carrier always off.

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C1: Normal transmit carrier switching.

Result Codes:

OK n = 1

ERROR Otherwise

Dn Dial

This command instructs the modem to begin the dialing sequence. The dial string (n,

including modifiers and the telephone number) is entered after the ATD command. A dial

string can be up to 60 characters long. Any digit or symbol (0¾9, *, #, A, B, C, D) may be

dialed as touch-tone digits. Characters such as spaces, hyphens, and parentheses do not

counτ¾they are ignored by the modem and may be included in the dial string to enhance

readability. The following may be used as dial string modifiers:

LRedials last number. Should be the first character following ATD, ignored

otherwise.

PPulse dialing.

TTouch-tone dialing (default).

,Pause during dialing. Pause for time specified in Register S8 before processing the

next character in the dial string.

WWait for dial tone. Modem waits for a second dial tone before processing the dial

string.

VThe modem switches to speakerphone mode and dials the number. An ATH

command may be used to disconnect the voice call.

@Wait for quiet answer. Wait for five seconds of silence after dialing the number. If

silence is not detected, the modem sends a NO ANSWER result code back to the

user.

!Hook flash. Causes the modem to go on-hook for 0.5 seconds and then return to

off-hook.

;Return to command mode. Causes the modem to return to command mode after

dialing the number, without disconnecting the call.

^Disable data calling tone transmission.

S=n Dial a telephone number previously stored using the &Zn=x command (see the

&Zn=x command for further information). The range of n is 0—3.

En Echo Command

This command controls whether or not the characters entered from your computer keyboard

are echoed back to your monitor while the modem is in command mode.

E0: Disables echo to the computer.

E1: Enables echo to the computer (default).

Result Codes:

OK n = 0, 1

ERROR Otherwise

Fn Online Data Character Echo Command

This command determines if the modem will echo data from the DTE. This modem does not

support the F0 version of the command. However, the modem will accept F1, which may be

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issued by older communication software, to assure backward compatibility.

F0: Online data character echo enabled (NOT SUPPORTED).

F1: Online character echo disabled.

Result Codes:

OK n = 1

ERROR Otherwise

Hn Hook Control

This command instructs the modem to go on-hook to disconnect a call, or off-hook to make

the phone line busy.

H0: Modem goes on-hook (default).

H1: Modem goes off-hook.

Result Codes:

OK n = 0, 1

ERROR Otherwise

In Request ID Information

This command displays specific product information about the modem.

I0: Returns modem identity string and driver version number, same as I3.

I1: Calculates ROM checksum and displays it on the DTE.

I2: Performs a ROM check and calculates and verifies the checksum displaying OK or

ERROR.

I3: Returns modem identity string and driver version number, same as I0.

I4: Returns firmware version for data pump.

I5: Returns the code ver, board ID, country ID and subsystem vendor ID in

hexadecimal

I6-8: Returns OK for compatibility.

I9: Returns country ID in English.

I11: Displays connection information as described in the following example.

Result Codes:

As described n = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11

ERROR Otherwise

The ATI11 result has two pages; the user must hit a key to get the second page. See the

following example:

ati11

Description K56flex connection V.90 Connection

--------------- ------------------ ---------------

1 Last Connection 56K V.90

2 Initial Transmit Carrier Rate 28800 28800

3 Initial Receive Carrier Rate 50000 49333

4 Final Transmit Carrier Rate 28800 28800

5 Final Receive Carrier Rate 50000 49333

6 Protocol Negotiation Result LAPM LAPM

7 Data Compression Result V42bis V42bis

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8 Estimated Noise Level 152 152

9 Receive Signal Power Level (-dBm) 25 25

10 Transmit Signal Power Level (-dBm) 16 16

11 Round Trip Delay (msec) 4 4

Press any key to continue; ESC to quit.

12 Near Echo Level (-dBm) NA NA

13 Far Echo Level (-dBm) NA NA

14 Transmit Frame Count 3 3

15 Transmit Frame Error Count 0 0

16 Receive Frame Count 0 0

17 Receive Frame Error Count 0 0

18 Retrain by Local Modem 0 0

19 Retrain by Remote Modem 0 0

20 Call Termination Cause 0 0

21 Robbed-Bit Signaling 00 00

22 Digital Loss (dB) 6 6

23 Remote Server ID 4342C3 NA

The ATI11 command may be issued from on-line command mode or after the end of a call.

After a call, some of the values are no longer valid; it's useful to know which ones. Each of the

line items in the ATI11 result is explained next:

1. V.90, 56K, V.34, or V.32 depending on the type of connection negotiated.

2. Initial upstream rate

3. Initial downstream rate

4. Current or final upstream rate

5. Current or final downstream rate

6. LAPM or MNP or None, depending on V.42 negotiation

7. V42bis or MNP or None, depending on V.42 negotiation

8. Mean-square error of received downstream signal. Difference between received

constellation point and reference decision point. This is a dimensionless decimal number, only

valid during a call. Higher numbers are worse. There's no absolute threshold of goodness; it

depends on the downstream data rate. The number varies during a call, so it can be useful to

sample it a few times.

9. The received signal power, although labeled -dBm, is only a relative measure for

comparing calls to/from different locations. Only valid during a call.

10. Upstream transmit signal power.

11. Round-trip delay in milliseconds.

12. Echo levels are valid for V.34 only.

13. Echo levels are valid for V.34 only.

14. Number of LAPM frames sent upstream during this call. Count wraps around at 65535.

15. Number of REJ frames received at the analog client modem.

16. Number of LAPM frames received by client during this call. Count wraps around at 65535.

17. Number of frames received in error by the client.

18. Number of retrains or rate renegotiations requested by this modem.

19. Number of retrains or rate renegotiations requested by remote modem.

20. Reason for call ending, only valid after call ends:

0 = Local modem command: ATH, DTR drop

1 = Remote modem: cleardown, loss of signal

2 = No answer, busy, etc.

3 = Training failure V.90, K56flex or V.34.

4 = Protocol failure if required by \N4, for example.

21. For PCM connection only, a hexadecimal 6-bit pattern of T1 frames with robbed-bit

signaling.

22. For PCM connection only, the downstream digital loss.

23. For K56flex connection only, the V.8bis info sent by the server. Meaning is defined at the

server and by

convention. Example above is from a recent Ascend MAX in m-Law.

Ln Monitor Speaker Volume

This command sets speaker volume to low, medium, or high.

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