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Motorola
SM56 Modem
Quick Start User's Guide
Contents
1
2
Overview
Introduction
3
4
Personal Computer Requirements
Preparing the Computer for SM56 Installation
5 Installing Hardware
6 Installing SM56 Software
6-1 Installing SM56 Software on Windows 95/98
10
11
12
13
8
9
6-2 Installing SM56 Software on Windows NT4.0
7 Verifying Correct SM56 Installation
Changing the Operating System
Using the SM56 Modem
14
Un-installing and Upgrading the SM56 Modem
Troubleshooting
Reporting Problems and Contacting the Modem Supplier
Understanding SM56 Windows Logo Certification
An Overview of the V.90 Standard Protocol
Appendix A SM56 Features
Appendix B Software License Agreement
Appendix c Supported AT Commands
1 Overview
This document helps the OEM, system integrator, VAR, and end user with host system selection and proper modem hardware and software installation. It lists qualified host personal computer systems, and explains proper modem use. This document helps you select CPUs, and it explains the tradeoffs associated with different processors. It explains the use of the SM56 Data/Fax/Voice modem with various sound card configurations. It also aids you in troubleshooting and testing the
SM56 equipped system.
2 Introduction
Motorola's SM56 Modem is a feature-rich modem at an attractive price. It provides high-speed communications between your personal computer and a remote location, such as an Internet
Service Provider (ISP), so you can:
•
Receive data at up to 56 Kbps in V.90 or K56flex modes
•
Get automatic fallback to V.34 (33.6 Kbps) rates in bad line conditions and on non-
V.90/K56flex headends
•
Use your computer as a telephone answering machine (TAM)
•
Send and receive faxes on your personal computer at rates up to 14.4 Kbps
•
Use your computer as a video phone to place and receive video phone calls
(Data/Fax/TAM/Speakerphone modem with video equipment)
•
Use your computer to conduct hands-off speakerphone voice calls
(Data/Fax/TAM/Speakerphone modem)
Important
The SM56 ISA modem runs on Windows 95, Windows 98, and it can be used by applications that run in an MS-DOS box (under Windows 95/98). Windows 95 and Windows 98 use the same
SM56 software builds.
The SM56 PCI modem also runs on Windows 95 and Windows 98. It does not directly support
Windows 95/98 DOS box applications. Refer to the Troubleshooting section for information on a third party COM port virtualizing/trapping application that allows the SM56 PCI modem to be used with DOS box applications.
Personal-computer OEMs that incorporate the SM56 can benefit from sizable cost reductions, hardware reduction, and lower power consumption. End users benefit from quick, easy and affordable software upgrades, which help them keep current with the latest communications technology.
Please check with your direct modem supplier for the latest software updates and other product information.
3 Personal Computer Requirements
Motorola performs rigorous, exhaustive testing on its modems. It developed a list of recommended personal computer features that perform well with the SM56. The information includes qualified
CPUs, Level 2 cache requirements, operating systems, RAM requirements, and third-party sound card compatibility. However, in today's dynamic technology markets, it is not possible to test all components and combinations on all systems.
This section outlines minimum system requirements for SM56 operation. On these systems, CPU loading was found to be acceptable and the modem demonstrated good performance over the entire network model.
Important: SM56 operation is not limited to the personal computer systems listed here.
Recommended CPUs
The SM56 modem has been qualified (tested for processor loading and TSB network model coverage) on the following processors:
•
Intel Pentium, 150MHz with MMX, 256K Level 2 (L2) cache
•
Intel Pentium, 200MHz, 256K L2 cache
•
Intel Pentium II
•
Intel Pentium Pro
•
Intel Celeron (Pentium II, 266MHz, no L2 cache)
The SM56 functions satisfactorily on the following systems. However, it has not been fully qualified (it was not tested for processor loading or TSB performance):
•
AMD K6, 233 MHz, 256K L2 cache
•
AMD K6-2, 256K L2 cache
•
Cyrix 6x86MX, 266MHz, 256K L2 cache
The SM56 does not function on the following CPUs, whose floating-point performance is insufficient:
•
Cyrix MediaGX
•
Cyrix MediaGXM
•
Cyrix 6x86
Level 2 Cache Benefits
Level 2 (L2) cache is an instruction memory (SRAM) bank that resides outside the CPU core. It holds many instructions close to the CPU, to reduce the need for the processor to use slow access cycles fetching instructions from main memory (DRAM). Eliminating most CPU accesses to main memory considerably improves overall system performance.
The SM56 Software Modem works best when a minimum of 256K L2 Cache is installed on the computer system motherboard to minimize processor loading. Intel's Celeron (266MHz PII) systems do not have L2 cache. Although the SM56 operates on those systems, host processor loading increases in the absence of L2 cache.
Compatible Operating Systems
The SM56 modem will run on the following operating systems:
•
Windows 95 (OEM Service Release 2.0 or later)
•
Windows 98
•
DOS Box under Windows 95/98. Note that the SM56 PCI modem does not include direct DOS box support. Refer to the Troubleshooting section for information on working around this limitation.
System RAM Requirements
The SM56 Modem operates on systems that have the minimum RAM required by the installed operating system. As with L2 cache, the more main memory, the better. The recommended RAM is twice the required minimum. This reduces slow hard-disk swapping and improves overall system
performance... especially when executing numerous concurrent processes. The minimum RAM requirements are:
Windows 95/98 16 MB
4 Preparing the Computer for SM56 Installation
To ensure problem-free installation of the SM56 modem, ensure that an IRQ is available, as follows.
1. In Win95/98, open the Control Panel.
2. Double click the System icon.
3. Select the Device Manager tab.
4. Highlight the Computer icon.
5. Select the Properties radio button.
6. Ensure that the Interrupt Request (IRQ) radio button is selected.
This displays the IRQ lines that are in use on the computer. Available lines are not shown in the list. To install the SM56 ISA modem hardware, interrupt line 3, 4, 5, 6, 7, or 9 must be available.
The PCI SM56 software modem can use an IRQ in the range 3 through 15.
If there is no IRQ line available for the SM56 disable one of the COM ports in the BIOS.
Note: If you are using a Windows 95/98 DOS box application, the modem requires two IRQs.
Refer to the Troubleshooting section in this document, or to the on-line User's Guide for more information on DOS application support. You can access the User's Guide through the modem
Control Panel.
Important: The SM56 PCI modem does not directly support DOS box applications. Please refer to the Troubleshooting section for information on how to get around this limitation.
To ensure that COM Port 2, 3, or 4 is available, you can use the following steps:
1. Open the Control Panel.
2. Double click the System icon.
3. Choose the Device Manager tab.
4. Highlight the Ports (COM and LPT) branch.
5. Expand the branch to see which ports are installed on the computer.
To install the SM56 ISA modem so that it is accessible through older application software and
DOS programs, COM port 2, 3, or 4 should be available. If none of these ports are available, you must disable one of the COM ports in the BIOS.
5 Installing Modem Hardware
Hardware Installation:
Install the modem card as follows.
1. Power down the personal computer.
2. Locate a vacant bus connector (ISA or PCI, depending on your hardware) and insert the modem card.
3. If using the SM56 Data/Fax/TAM/Speakerphone modem, connect the sound subsystem interface cable(s) to the modem card (via the internal TAPI connector or using the audio jacks
-- refer to the information above on sound card compatibility.)
4. Connect the modem Line input to an analog phone jack using an RJ-11 phone cable. Optionally, connect a telephone handset to the Phone input on the line interface card. The external telephone cable connections are as follows.
5. Replace the personal computer cover and power the personal computer on.
6 Installing SM56 Software
6-1 Installing SM56 Software on Windows 95/98
IPCI Slots
The SM56 for PCI is PCI Plug and Play compliant. It requires one IRQ ( IRQ 3, 4,...15) and one memory mapped base address.
Windows 95/98 assigns the modem a COM port number. The SM56 installation software attempts to negotiate a COM port number in the range of 1-4 in order to support older software and DOS games. Note that the SM56 PCI modem does not include direct DOS box support. Please refer to the Troubleshooting section for information on how to get around this limitation.
Installing on Windows 95/98
(Note: The Install Wizard may vary slightly with different versions of Windows 95 and Windows
98.)
On starting Windows 95/98 for the first time after installing the SM56 (ISA or PCI) line interface card, the Windows 95/98 Configuration Manager detects the new hardware, assigns resources to it, and then displays a window requesting the modem software drivers. This indicates that the
Configuration Manager is looking for the information (INF) file, which contains information about the modem, including device type (Modem), device driver information (the name of the driver that will control the modem) and the AT command/response sets that it supports.
In response to the request window, insert the distribution CD-ROM that contains the SM56 installation software. Select Driver from Disk Provided by Hardware Manufacturer. Windows should find the information on the disk and identify the device as the SM56 Modem Line Interface
Card. It copies the files from the install disk to the computer.
Note: The SM56 install program may display a message box that reports Cannot locate file
_inst32.ex_... If this occurs, browse and re-point the path to the SM56 installation CD ROM again. Then click OK.
On boards that have voice capabilities (SM56 Data/Fax/Voice models), another device is found after the modem has been installed. Windows notifies you that it has found a Serial Wave Device for the modem and prompts for a Wave Device driver. Re-point Install Shield to the SM56 distribution disk, and click OK.
When these two devices are installed, the SM56 Modem Setup program runs.
SM56 Modem Setup for PCI
The modem setup program for PCI does not prompt for user input during installation. It defaults to
USA country code and Domestic English as the language for the Help files. If you wish to change either of these settings you may do so via the SM56 PCI Control Panel application (see
Verifying
Correct SM56 Installation
section) after setup is complete. Also, for SM56
Data/Fax/TAM/Speakerphone modems the microphone and speaker gain selections are done via
the Control Panel application (under the Advanced tab). The SM56 PCI Data/Fax/TAM only modem does not have a Microphone/Speaker Gain selections.
Determining Microphone Gain Setting
If you connect the modem to the sound card through the internal TAPI connector, use the following procedure to determine the appropriate microphone gain.
Determine whether the sound card has applied any gain to the microphone signal that is presented at its TAPI connector.
Note: The SM56 PCI modem (Data/Fax/TAM/Speakerphone only) Control Panel application provides slider bars so users can fine tune speaker and microphone gains more easily.
6-2 Installing SM56 Software on Windows NT 4.0
Important -- The SM56 software for Windows NT is Data/Fax only, there is no speakerphone or TAM supported.
Windows NT 4.0 does not fully support plug and play (PnP). Therefore, after installing the modem board in the computer and booting, the operating system will not automatically recognize that new hardware is present. You must manually install the modem as follows:
Step 1 -- Install a COM port for the modem
You must install a COM port for the SM56 modem as follows:
1. Open the Windows NT Control Panel.
2. Double click the Ports icon. The Ports window opens.
3. Select Add.
4. Select a COM port number (in the range 1-4 preferably) that is not already installed, and allocate to it the standard resources as follows:
2
3
4
COM Port IO Address IRQ
1 3F8 4
2F8
3E8
2E8
3
4
3
5. When your selections are complete click OK.
6. You will be prompted to restart the computer, do not do so yet. Select Don't Restart Now.
7. Close the Ports window.
Step 2 -- Install the SM56 modem software
1. Open the Windows NT Control Panel.
2. Double click the Modems icon....the Install New Modem dialog appears.
3. Click the "Don't detect my modem; I will select it from a list" check box. Then click Next.
4. Click the Have Disk button.
5. Browse to the Windows NT SM56 modem install software. Click misgmodm.inf to highlight it.
Then click Open, then click OK.
6. Select the Motorola SM56 Modem (note that the product name listed will vary depending on which modem you have -- Data/Fax/, Data/Fax/TAM, etc.) from the list. Click Next.
7. Click the port number selected in Step 1 above to highlight it as the COM port for the modem.
Then click Next. The wizard will now copy all the necessary files and install the SM56 modem on your PC.
8. When complete, restart the PC to activate and start the COM port and SM56 modem devices.
You are now ready to use the modem.
7 Verifying Correct SM56 Installation
Verify that the SM56 software and hardware installation was completed correctly as follows.
Verifying SM56 Software Installation
1. Verify correct COM port selection.
You can check COM port installation through the Modems icon in the Control Panel or through the SM56 Control Panel application (see below). Normally, the SM56 will install on COM2,
COM3, or COM4. Sometimes, however, depending on your computer system setup or Windows setup, the SM56 may install on COM5 (or higher).
Although the modem functions correctly on COM5, many Internet Service Provider (ISP) software applications (such as AOL) do not work if the modem is on a COM port number higher than
COM4. If the SM56 installs on COM5 (or higher), refer to the Troubleshooting section for assistance.
2. Run simple diagnostic from the SM56 Control Panel.
The SM56 software modem provides an informative Control Panel that reports:
•
Modem status: in use/not in use; dialing; negotiating a connection; actual connect rate (updated in real time during a connection)
•
A button to access the on-line User's Guide
The SM56 Control Panel program also provides access to two Windows components:
•
COM port and IRQ information
•
A diagnostic utility that sends the modem ATI commands and displays the results: software build, modem type (DF or DFV), and more.
To access the diagnostics option from the Control Panel, click Properties; select the Diagnostics tab; select the SM56 Modem from the list; and then click More Info. If the driver is properly installed, a dialog box appears, with responses to the ATI commands as shown in the example below. Refer to the AT Commands section in the on-line User's Guide for an explanation of ATI commands.
Verifying SM56 Hardware Operation
To verify correct SM56 modem card hardware operation (up to the isolation transformer), you can use the following loop back test procedure.
1. Important: Remove the telephone line connector from the modem card.
2. Select Start.
3. Select Programs-->Accessories-->HyperTerminal.
4. Double click the Hypertrm.exe icon.
5. Optionally, select a connection name and icon.
6. In the Connect Using window, select Motorola SM56 modem.
7. Enter a number in the Phone Number box.
8. Select Dial.
9. Select Cancel.
10. Enter AT <cr>.
The response OK should appear.
11. Enter ATS46 = 23 <cr>.
12. Enter AT&T1 <cr> . Wait a few seconds.
13. Type some letters at the keyboard. If the hardware is functioning correctly, the letters you type appear on the HyperTerminal display.
8 Changing the Operating System
Windows 98 Upgrade Error Message
If the SM56 modem is installed on a Windows 95 PC, and then the system is upgraded to Windows
98, the following error message appears when Windows 98 starts:
Duplicated device: vcd
To remove the error, edit the SYSTEM.INI file and locate the line that reads:
Device = *vcd
Delete this line. Save the modified SYSTEM.INI file and restart Windows 98. You will no longer get the error message.
9 Using the SM56 Modem
32-Bit Windows 95/98 Applications
Because 32-bit Windows 95/98 applications use TAPI for communicating with modems, using the
SM56 is as easy as selecting the SM56 modem by name from the list of available modems.
16-Bit Windows 95/98 Applications
Because 16-bit applications cannot use the TAPI interface, there is a bit more setup needed.
1. Select Motorola SM56 modem from the list of supported modems (if the SM56 modem is
not shown, select Hayes Compatible modem).
2. Configure the application's COM port selection. Use the COM port assigned to the SM56
modem.
3. If the application requires it, enter specific AT commands for the SM56 modem. (For a
full list of AT commands, refer to the SM56 on-line User's Guide). Some typical AT
commands are listed below.
DOS-Based Applications and Games
Important: The SM56 PCI modem does not include direct DOS box support. Please refer to the
Troubleshooting sections for information on a way to get around this limitation.
The SM56 ISA modem can be used in DOS only through a Windows 95/98 DOS box.
DOS support is achieved by virtualizing the standard I/O and IRQ assigned to a COM port. This means that the SM56 drivers capture and redirect all I/O to/from the standard I/O address for the
COM port to which it assigned. In simpler terms, you tell the application the COM port of the
SM56, and then use all the standard I/O and IRQ settings. Standard I/O addresses and IRQs for
COM Ports 1-4 are as follows:
COM Port IO Address IRQ
1 3F8 4
2
3
4
2F8
3E8
2E8
3
4
3
To determine the SM56 COM port number, open the SM56 Control Panel and select the
Diagnostics tab. The COM port number to which the SM56 modem is assigned is listed here.
Configure your application to use this COM port. For example, if the SM56 modem has been assigned COM 3, configure your application to communicate through COM 3.
Enter the AT commands for the SM56 modem as required by the application. Some typical AT commands are as follows.
AT Commands Commonly Needed by Applications
Applications generally prompt for the following commands.
Initialization* AT&F
Hangup
Dialing string
Answer string
ATH0
ATDT
ATA
*Some games require that the modem refrain from performing error correction and data compression. In these cases, use the initialization string AT&F\N0.
For a full list of AT commands, refer to the on-line User's Guide.
10 Un-installing and Upgrading the SM56 Modem
SM56 Un-Install Procedure
1. Open the Control Panel.
2. Select Add\Remove Programs.
3. In the dialog box, select Motorola SM56 Modem Uninstall.
4. Select Add/Remove.
5. When asked to close the Control Panel window do so to allow the SM56 Control Panel applet to be removed.
6. Shut down the computer.
7. Remove the SM56 hardware from the computer. (Note: If you do not remove the SM56 line interface card, the SM56 will be automatically re-installed when Windows 95/98 restarts.)
The SM56 modem software remains on the PC hard disk for later installs without needing a complete software install again. Simply install the modem card back in the PC and the software will automatically self-install.
SM56 Software Upgrade Procedure (Windows 95/98)
Upgrade the SM56 modem to a newer version as follows.
1. Obtain the latest software version from your direct modem supplier.
2. Run setup.exe and follow the Upgrade Wizard prompts. The upgrade utility retains a backup of your previous modem version in a folder called Program Files\Motbak95.
Recovering From an Unsuccessful Upgrade (Windows 95/98)
If , after an SM56 upgrade, you have problems with the new driver, you can restore your previous
SM56 software installation as follows. Perform all of the following steps.
1. Open the Control Panel. Select Add/Remove programs.
2. If SM56 Modem is in the list of installed programs, click on SM56 Modem, then Click
Add/Remove to run the un-install program.
3. Open the windows\inf\other folder. Delete all Motorola INF files that are listed there.
4. Edit the Registry and remove the following key if present:
HKLM-->System-->CurrentControlSet-->Services-->SM34DFV
5. Open the Control Panel and determine if the SM56 Modem Control Panel is there. If so, close the Control Panel; open the windows\system folder; and delete the mca.cpl file.
6. Open the windows\system.ini file. Search for device = motvcd.vxd. If it is present, change it to device = *vcd.
7. Restart the computer.
8. Upon restart, the New Hardware Found window appears. Browse to: Program
Files\Motbak95.
9. Perform the SM56 software installation procedure (refer to Section 6 or 7). This will reinstall your previous modem software.
11 Troubleshooting
If there is a problem making or receiving a call or transmitting data, and your communications application does not explain the problem, check the following list of symptoms and tips.
•
The modem installs at COM 5 (or higher)
Some ISP applications, such as America on-line, do not communicate with a COM port higher than COM4. If the SM56 installs on COM5 or higher, force the modem to a lower COM port as follows.
1. Open the SM56 Control Panel application.
2. Select the Advanced tab.
3. Click on the radio button for the desired COM port. Note that unavailable COM ports are grayed out and not selectable.
Note: For SM56 ISA modems Build 58 and later include this feature on the Control Panel applet.
If using earlier builds, edit the PortName data in the Windows Registry HKLM-->Enum--
>ISAPNP-->nnnn, where nnnn corresponds to the modem's plug and play ID. Change PortName data to the desired COM port. The changes take effect as soon as the Registry editor (REGEDIT) is closed. There is no need to restart the PC.
•
Windows 95/98 DOS box applications do not work with the modem
1. The SM56 PCI modem does not directly support Windows 95/98 DOS box applications. If you are using the SM56 PCI modem you must use a third party application that traps and virtualizes the COM ports. One such application is provided by Pacific Commware, Inc.
(Ashland, Oregon). They can be found on the Web at www.pacificcommware.com. The application is called TurboCom/95 Pro, and works on Windows 95 and Windows 98 platforms. Note that Motorola have not completely tested and qualified this product for SM56
DOS box support, but have verified basic functionality.
2. If using the SM56 ISA modem, open the Control Panel.
3. Double click the System icon.
4. Expand the Modem branch.
5. Double click the Motorola SM56 modem.
6. Select the Modem tab. Make a note of the COM port number.
7. Select the Resources tab. Make a note of the IRQ number listed.
8. For DOS support to operate correctly, the SM56 modem cannot occupy the standard IRQ for the COM port number.
9. Uncheck the Use Automatic Resources check box.
Double click on the Interrupt Request label and change the IRQ to a different level that is not in conflict with another device. (If there is no free IRQ: free one, or change other device IRQ levels to free a non-standard IRQ).
•
There is no dial tone
1. Ensure that the telephone cable is securely connected at both ends.
2. Unplug the telephone line cable from the computer, and connect it directly to a telephone from the wall outlet. Check for a dial tone. If there is none, the problem is in the telephone line or system. Call the service provider.
•
The modem cannot complete a connection to another modem
1. Ensure that your modem is dialing the correct number. Ensure that you've specified the correct area code, if one is required.
2. Determine whether the remote modem is correctly configured to communicate with yours.
•
The modem does not answer incoming calls
1. Ensure that the automatic answer parameter is set to one of the enabled options, using the
ATS0 command (ATS0=1 to answer after one ring, and so on).
2. Ensure that no other devices, such as fax or answering machines, are answering calls before the modem does.
•
The modem disconnects while transmission is in progress
1. Ensure that the telephone cable is securely connected at both ends.
2. Ensure that call-waiting is disabled. In most areas, the command *70 or #70 disables callwaiting. Check with your telephone company for the correct key sequence. (With call-waiting, the incoming call's click sound may be disrupting your call.)
•
Data is not transmitted or received for unusually long periods of time
Re-dial the call. (The telephone line connection may be poor.)
•
The computer runs slower than usual
1. Close any open applications that you are not using.
2. For the SM56 for ISA only: try adjusting the modem's CPU Usage option from High to
Medium; or Medium to Low. This is in the SM56 Control Panel application. This option is not available for the PCI modem.
•
You cannot enter tone selections successfully when calling tone-driven applications
When dialing a remote system that requires you to enter selections using the telephone keys, such as a voice-mail depot or bank-account information provider, you can lengthen the duration of the tones your modem sends, so that the remote system can detect them better. To adjust DTMF tone length, use the AT+VTDn command, where n specifies the tone duration.
•
The modem does not respond to AT commands
1. Ensure that your communications software is configured to use the same COM port as the modem's COM port.
2. Reset modem parameters to default options by entering AT&F; then re-enter custom options.
3. SM56 builds after Build 50 require setting the S46 register to 23 before AT&T1 will perform the Local Analog Loop(LAL) back hardware test.
•
The modem responds to commands, but they do not appear on the screen
Ensure that the Echo option is enabled by entering ATE1.
•
You've installed a new peripheral device; now the modem does not work
1. In the Windows desktop tray, select Start. The start menu appears.
2. Select Help. The Windows Help Topics window appears.
3. Select the Contents tab.
4. Select If You Have a Hardware Conflict.
5. A series of troubleshooting actions appears. Follow the appropriate sequence.
•
You hear feedback (noise) from the sound system
(Data/Fax/TAM/Speakerphone only)
1. Position the speakers at least three feet (1 M) away from the microphone.
2. Ensure that the speakers are facing away from the microphone.
3. Turn down the speaker volume.
4. Speak into the microphone at a distance of at least 12 inches (30 cm) from your mouth.
Minimize background noise.
5. If there is still feedback, turn off the microphone boost, under the volume control panel.
•
The modem connects; then meaningless characters appear
1. Open the Control Panel. Double click the Modem icon.
2. Select the Motorola SM56 modem
3. Click on Properties.
4. Select Connection.
5. Click on Advanced.
6. Check the Use Error Control-Required to Connect box.
•
The modem cannot connect; the Error Control option is selected
The modem may be connecting at a rate higher than appropriate for the line conditions.
1. Use the AT%B command to limit the SM56 maximum connection rate. (For a list of AT commands, refer to the on-line User's Guide.)
2. Lower the rate, using AT commands, until the problem is corrected. You can add AT commands to do this; refer to the next section .
How to Add AT Commands
1. Open the Control Panel.
2. Double-click the Modem icon.
3. Select the Motorola SM56 modem.
4. Click on Properties.
5. Select Connection.
6. Click on Advanced.
7. In the Extra Settings box, add commands as needed.
12 Reporting Problems and Contacting the Modem Supplier
If you have a problem with the modem, ensure that the problem and its solution are not shown in the Troubleshooting section. If you cannot resolve it through troubleshooting, send the following information in an email to your direct modem supplier, so that they can reproduce and resolve the problem.
Information about your computer:
•
Brand and model
•
CPU type (Pentium, Pentium II, AMD, etc.) Specify if MMX
•
CPU clock rate
•
Amount of Level 2 cache memory
•
Operating system and version (Windows 95 OSR revision level, Windows 98, etc.)
Information about your modem:
•
SM56 modem card version; modifications to your SM56 modem card
•
SM56 version number (find this with the ATI3 command; or with the More Info button in the
SM56 Control Panel)
Information about your setup:
•
The telephone number you are calling from
•
The telephone number you are calling to
•
If performing a lab test, a detailed description of the equipment used
•
The remote modem information
Information about the problem:
•
The actions and steps that you performed
•
A description of what you saw; be specific
•
A description of what you expected to see
13 Understanding SM56 Windows Logo Certification
After rigorous testing at a Microsoft Windows Hardware Quality Lab (WHQL), the ISA busbased SM56 software modem met the stringent qualifications to receive the Designed for
Microsoft Windows logo. The PCI modem will be qualified later. The logo is targeted at commercially marketed desktop applications that run on the latest released versions of Windows
95, Windows 98, and Windows NT Workstation. It is not intended for client/server or Windows
NT Server applications. The goals of the logo certification program are to improve Windows hardware and software quality, increase end-user satisfaction, and reduce support costs.
To receive the logo, a product must show proof of compatibility with Windows 95/98 and NT. The
SM56 Software Modem passed the stringent tests to show that, among other capabilities, it:
•
Installs and registers itself properly with the operating system
•
Is reliably functional and stable
•
Removes itself (minus its core components) using an automated uninstaller
•
Supports Universal Naming Conventions (UNC) and Long File Names (LFN)
The modem also passed a host of other performance and feature-set tests of its data, fax, and voice modes.
What does the logo mean for the SM56 ISA modem? It means that Motorola and its OEMs, system integrators, and VARs can now use the Windows logo on their products and packaging, and on advertising, collateral, and marketing materials. This signals end users that the SM56 software modem is tested and fully functional on Windows 95/98 and Windows NT 4.0; that it is designed to provide optimum usability and compatibility; and that it takes advantage of the latest technologies provided by these operating systems. It makes users feel more comfortable about purchasing the product, and it assures them of more complete satisfaction while using it.
The Windows logo also means that the SM56 software modem is included on Microsoft's Windows
Hardware Compatibility List (HCL) under "Logo," reinforcing to customers and end-users alike that it meets Microsoft's strict requirements and operates properly with Windows operating systems.
In summary, Windows Logo certification increases recognition and adoption of SM56 Software
Modem technology worldwide. It demonstrates Motorola's long-term commitment to providing high performance, quality products.
14 An Overview of the V.90 Standard Protocol
In February 1998, the International Telecommunications Union (ITU) formulated the V.90
industry-standard protocol for 56K modems. Before the adoption of the V.90 standard, 56K modems complied with one of two pre-standard implementations: K56flex or X2 technology.
Unfortunately for ISPs and end-users, these technologies were not compatible. ISPs had to worry about which standard to employ. End users had to be sure to purchase modems compatible with their ISP's equipment.
Upgrading Motorola's SM56 K56flex modems to V.90 is a software-only upgrade. There is no change to the line interface hardware. This makes it easy for pre-V.90 users to upgrade their system to V.90 compliance.
Note: sometimes V.90 is referred to as V.PCM. PCM is an acronym for Pulse Code Modulation.
With V.90, high-speed downstream (from Internet to personal computer) data transmission is accomplished using PCM techniques. Before the ITU formulated its standard V.90 protocol, the industry typically referred to it as V.PCM. This name is fading from use.
V.90 technology allows users to connect to the Internet at rates up to twice as fast as those of V.34
(33.6Kbps) modems. The maximum receive (downstream) rate is 56Kbps, while the return path
(upstream) connects at V.34 rates up to 33.6 Kbps. This is perfect for Internet connections, where most data is transferred downstream.
The SM56 begins connections by attempting a V.90 connection to the headend. If the headend is not V.90, the SM56 automatically switches to K56flex mode. If K56flex mode fails (when, for example, the headend uses X2 technology, or there is a noisy phone line condition), the SM56 drops to V.34 rates. This auto-mode switching mechanism ensures maximum compatibility with all remote headends.
On the Web you can visit www.v90.com for a wealth of information on V.90 technology, including:
•
A list of ISPs that support V.90
•
The latest news on V.90
•
White papers on the V.90 standard
•
Technology descriptions
•
Frequently asked questions (FAQs)
Appendix A: SM56 Specifications
•
Full Windows 95/98 compatibility; received Microsoft Designed for Windows Logo
•
Compatibility with Windows 95/98 communication applications
•
Compatibility with communications applications that run in an MS-DOS® box
•
An installation engine with country selection. (Selecting the correct country during installation is important, since this selects between A-Law and
µ
-Law
compansion)
•
Plug and Play operation
•
Support for various data modulation modes:
- V.90 connection rates if the headend is a true V.90 location. V.90 downstream rates to
56Kbps. Upstream rates to 33.6Kbps (V.34).
- Fallback to K56flex® mode if the headend is K56flex, not V.90. K56flex® downstream rates to 56Kbps. Upstream rates to 33.6Kbps(V.34).
- Connection at V.34 rates (33.6 Kbps) if the headend is not V.90 or K56flex®.
- V.32bis, V.32, V.22bis, V.23, V.22/B212, V.21, Bell 103.
•
Error correction - V.42, LAPM, MNP2-4
•
Data compression - V.42bis, MNP5
•
Fax modes supported - V.17, V.27ter, V.29
•
Full voice support on Data/Fax/TAM/Speakerphone modems...where TAM is Telephone
Answering Machine.
•
Full-duplex speaker phone with acoustic and line echo cancellation
(Data/Fax/TAM/Speakerphone modems only)
•
Answering machine capability with PCM and IMA ADPCM audio formats
•
Caller ID (USA and Canada)
•
Distinctive Ring (USA and Canada)
•
Control Panel that provides general modem information and diagnostics
•
Full pulse and tone dialing and call progress monitoring
•
Adaptive rate re-negotiation (up and down) during a connection to compensate for line dynamics
•
Auto dial and answer
•
On-line user's guide accessible through the Control Panel
Appendix B: Software License Agreement
THE FOLLOWING AGREEMENT IS A LEGAL AGREEMENT BETWEEN YOU (EITHER
AN INDIVIDUAL OR ENTITY), AND MOTOROLA, INC. (FOR ITSELF AND ITS
LICENSORS). THE RIGHT TO USE THIS PRODUCT IS SOLD ONLY ON THE
CONDITION THAT YOU AGREE TO THE FOLLOWING LICENSE. USING THIS
PRODUCT CONSTITUTES ACCEPTANCE OF THE TERMS AND CONDITIONS SET
FORTH IN THIS AGREEMENT.
The enclosed computer program(s) ("Software") is licensed, not sold, to you by Motorola, Inc.
("Motorola") for use only under the terms of this License, and Motorola reserves any rights not expressly granted to you. You own the disk(s) on which the Software is recorded or fixed, but
Motorola and its licensors retain ownership of the Software itself and its accompanying written materials, which are protected by the copyright laws of your country and international treaty provisions.
1. License. This License allows you to use one copy of the Software on a single computer at a time. To "use" the Software means that the Software is either loaded in the temporary memory
(e.g., RAM) of a computer or installed on the permanent memory of a computer (e.g., hard disk).
2. Restrictions. The Software contains trade secrets in a human or machine perceivable form and, to protect them, you may not REVERSE ENGINEER, DECOMPILE, DISASSEMBLE OR
OTHERWISE REDUCE THE SOFTWARE TO ANY HUMAN OR MACHINE
PERCEIVABLE FORM. YOU MAY NOT MODIFY, ADAPT, TRANSLATE, RENT,
LEASE, LOAN OR CREATE DERIVATIVE WORKS BASED UPON THE SOFTWARE OR
ANY PART THEREOF.
3. Termination. This License is effective until terminated. This License will terminate immediately without notice form Motorola or judicial resolution if you fail to comply with any provision of this License. Upon such termination you must destroy the Software, all accompanying written materials and all copies thereof, and Sections 5, 6, 7 and 8 will survive any termination.
4. Export Law Assurances. You agree that neither the Software nor any direct product thereof is being or will be shipped, transferred or re-exported, directly or indirectly, into any country
prohibited by the United States Export Administration Act and the regulations thereunder or will be used for any purpose prohibited by the Act.
5. Warranty. The Software and written materials are provided "AS IS" and without warranty of any kind. Motorola's entire liability and your sole and exclusive remedy for any breach of the foregoing limited warranty will be, at Motorola's option, replacement of the disk(s) or refund the amount paid for this Software License.
NO OTHER WARRANTY IS PROVIDED BY MOTOROLA, AND MOTOROLA AND ITS
LICENSORS EXPRESSLY DISCLAIM ALL OTHER WARRANTIES, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. MOTOROLA DOES NOT WARRANT THAT THE OPERATION
OF THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR-FREE, OR THAT
DEFECTS IN THE SOFTWARE WILL BE CORRECTED. NO ORAL OR WRITTEN
REPRESENTATIONS MADE BY MOTOROLA OR AN AGENT THEREOF SHALL
CREATE A WARRANTY OR IN ANY WAY INCREASE THE SCOPE OF THIS
WARRANTY. BECAUSE SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF IMPLIED WARRANTIES, THE ABOVE LIMITATIONS MAY NOT
APPLY TO YOU.
6. Limitation of Remedies and Damages. Regardless of whether any remedy set forth herein fails of its essential purpose, in no event shall Motorola or any of the licensors, directors, officers, employees or affiliates of the foregoing be liable to you for any consequential, incidental, indirect, special or similar damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information and the like), whether foreseeable or unforeseeable, arising out of the use or inability to use the Software or accompanying written materials, regardless of the basis of the claim and even if Motorola or a
Motorola representative has been advised of the possibility of such damage. Motorola's liability to you for direct damages for any cause whatsoever, and regardless of the basis of the form of the action, will be limited to the price paid for the Software that caused the damages. THIS
LIMITATION WILL NOT APPLY IN CASE OF PERSONAL INJURY ONLY WHERE AND
TO THE EXTENT THAT APPLICABLE LAW REQUIRES SUCH LIABILITY WITHOUT
THIS LIMITATION. BECAUSE SOME JURISDICTIONS DO NOT ALLOW THE
EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
7. General. This License will be construed under the laws of the State of Massachusetts with venue therein (or in the case of exclusive Federal jurisdiction, with venue in the Federal District of Massachusetts). If any provision or portion thereof of this License shall be held by a court of competent jurisdiction to be void or unenforceable, that provision will be enforced to the maximum extent permissible, and the remaining provisions of this License will remain in full force and effect. If you are a U.S. Government user, then the Software is provided with
"RESTRICTED RIGHTS" as set forth subparagraphs (c)(1) and (2) of the Commercial
Computer Software-Restricted Rights clause at FAR 52 227-19 or subparagraph (c)(1)(ii) of the
Rights in Technical Data and Computer Software clause at DFARS 252.227-7013, as applicable.
8. Complete Agreement. This License constitutes the entire agreement between the parties with respect to the use of the Software and related documentation, and supersedes all prior or
contemporaneous understandings or agreements, written or oral, regarding such matter. No amendment to or modification of this License will be binding unless in writing and signed by a duly authorized representative of Motorola.
_____________
Techbrief.Rev 9/30/98
Appendix A - Supported AT Commands
P
Q
T
V
X
Table of Supported AT Commands
H
I
A
D
E
AT Cmd
Answer
Dial
Async Echo
Function
Go on hook
Request Information
L
M
O
Z
Speaker Volume
Speaker Control
Return to On-Line
Pulse Dial
Result Code Display
Tone Dial
Result Code Format
Call progress Result Codes
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
Mode
DF
DFV
DFV
DFV
Reset to Default Configuration
DFV
Value
1
-
0
2
-
0
1
0
1
0
1
1
2
3
2
3
0
6
7
3
5
0,1
0
1
2
1
0
1
-
-
0
2
3
4
-
Setting
-
-
Disable
Enable
Go On Hook
Go On Hook, Busyout
‘960’
‘000’
K;
Software Version
Disconnect Reason
Country Code
Product Code
Low
Medium
High
Off
On During Training Only
On Always
Security
No Retrain
Retrain
Rate Renegotiation
-
Enable
Disable
-
Numeric Code
Verbose Code
NO CARRIER, CONNECT
NO CARRIER, CONNECT, CONNECT <rate>
NO CARRIER, CONNECT, CONNECT <rate>, NO
DIALTONE
NO CARRIER, CONNECT, CONNECT <rate>, BUSY
NO CARRIER, CONNECT, CONNECT <rate>, NO
DIALTONE, BUSY
-
AT Cmd
&C
&D
&F
&F=n
Function
DCD Control
DTR Control
Reset to Default Configuration
Reset to Specific Country
Mode
DFV
DFV
DFV
DFV
Value
3
-
1
2
N
0
1
0
Setting
Always On
On in Data Mode Only
Ignore DTR
On-to-Off, Enter Command Mode
On-to-Off, Disconnect Call
On-to-Off, Reset to Default Configuration
-
See table A for values of N
&G
&I
&P
&R
&S
&T
&V
%B
Guard Tone
Dial TX Level
Pulse Cycle
CTS Control
DSR Control
Test
Modem Status
Max Modulation Rate
DFV
DFV
DFV
DFV
DFV
DF
DFV
DFV
7
8
9
11
12
4
5
6
1
2
3
0,1
2
0
1
0
1
0
1
1
2
0
0
1
2
0 -15
0
24
25
26
19
20
21
22
23
27
28
16
17
18
13
14
15
21600 bps
24000 bps
26400 bps
28800 bps
31200 bps
33600 bps
32000 bps
34000 bps
36000 bps
38000 bps
40000 bps
42000 bps
44000 bps
46000 bps
48000 bps
50000 bps
Off
550 Hz
1800 Hz
TX levels 0 through -15 (default -9)
40/60 Make/Break Ratio
33.5/66.5 Make/Break Ratio
38.5/61.5 Make/Break Ratio
Normal
Always On
Always On
On When Modem Recognizes Remote
End Test
Initiate LAL
Short Form
Long Form
Maximum Rate (33600 bps)
300 bps
1200 bps
2400 bps
4800 bps
600 bps
9600 bps
7200 bps
12000 bps
14400 bps
16800 bps
19200 bps
%C
%D
AT Cmd Function
Data Compression
Disconnect Buffer Delay
Mode
DFV
DFV
Value
32
33
0
1
29
30
31
0
1 - 255
52000 bps
54000 bps
56000 bps
58000 bps
60000 bps
Disable
Enable
Disabled
Seconds
Setting
%L Min Modulation Rate
\K
\N
Break Handling
EC Mode
DFV
DFV
DFV
26
27
28
23
24
25
18
19
20
21
22
15
16
17
12
13
14
8
9
11
5
6
3
4
7
0
1
2
0
1
4
6
7
1
3
5
29
30
31
32
33
26400 bps
28800 bps
31200 bps
33600 bps
32000 bps
34000 bps
36000 bps
38000 bps
40000 bps
42000 bps
44000 bps
46000 bps
48000 bps
50000 bps
Minimum Rate (300 bps)
300 bps
1200 bps
2400 bps
4800 bps
600 bps
9600 bps
7200 bps
12000 bps
14400 bps
16800 bps
19200 bps
21600 bps
24000 bps
52000 bps
54000 bps
56000 bps
58000 bps
60000 bps
Destructive and Expedited
Non-Destructive and Expedited
Non-Destructive and Non-Expedited
Normal
Direct
LAPM Only (ETC)
Reliable
Auto-Reliable
AT Cmd
\Q
\T
\V
*BA
*BO
*CDL
*CT
*DCN
*DD
*HO
*LS
*MM
Function
DTE Flow Control
DTE Inactivity Disconnect
Connect Message Format
Baud Rate When Answer
Baud Rate When Originate
Clear Delay/Forbid Lists
Status Information
Display Country Number
Dial Wait
Homologation Strap
Low Speed
Modulation Mode
Mode Value
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
2
3
4
-
0
1
2
1
5
6
7
8
DFV Multi-Parameter
DFV 0
17
-
0
14
15
16
5
10
11
12
13
0
3
4
3
4
5
3
4
0
0
1
3
0
1 - 255
0
1
2
DFV
4
5
6
0
1
1
2
2
10
11
12
Setting
Disable
XON/XOFF
RTS/CTS
Disable
Minutes
Display DTE Rate
Display DTE Rate with EC/DC Info
Display DCE Rate
Display DCE Rate with EC/DC Info
Display DCE Rate with EC/DC and Modulation Info
2400 only
2400 or 3000
2400, 3000, or 3200
2400, 3000, 3200, or 3429
2400 only
2400 or 3000
2400, 3000, or 3200
2400, 3000, 3200, or 3429
2400, low Carrier Frequency (overrides *BA)
2400, high Carrier Frequency (overrides *BA)
3000, low Carrier Frequency (overrides *BA)
3000, high Carrier Frequency (overrides *BA)
3200, low Carrier Frequency (overrides *BA)
3200, high Carrier Frequency (overrides *BA)
3429, low Carrier Frequency (overrides *BA)
3429, high Carrier Frequency (overrides *BA)
-
Display EIA Info. See Table B
Display Disconnect Code. See Table C.
Display Ring Count
Number will be the same as in Table A
2 Seconds
3 Seconds
4 Seconds
6 Seconds
12 Seconds
15 Seconds
20 Seconds
30 Seconds
40 Seconds
Parameters described in Appendix E
Bell 103
CCITT V.21
Bell 103 or V.21
V.34 Auto
V.21
Bell 103
V.22/Bell 212
V.22bis
V.23
V.32
V.32bis
V.34 Only
AT Cmd
*TD
+A8E
Function
Dial TX Level
V.8 Origination Negotiation
V.8 Answer Negotiation
V.8 CI Signal Call Function
V.8bis Control
Mode
DFV
DFV
DFV
DFV
DFV
Value
13
14
0 - 15
6
0
0
1
1
5
00h - FFh
0
1
2
Setting
V.PCM Only
V.PCM Auto
TX Level 0 through -15 (default -9)
Disable
Enable DCE-controlled V.8 orig neg
Enable DCE-controlled V.8 orig neg, use +A8x indications
Disable
Enable DCE-controlled V.8 ans neg
Enable DCE-controlled V.8 ans neg, issue +A8x indications
Default is 00h
Disabled
Enabled - DCE controlled
Enabled - DTE controlled
+A8T
+DR
+DS
+EB
V.8bis Tx Signal
V.8bis Tx Message 1
V.8bis Tx Message 2
V.8bis Signal Detection
V.8bis Message Detection
V.8bis Message Delay
Data Compression Reporting
Data Compression Direction
DFV
DFV
DFV
DFV
Data Compression Negotiation
DFV
Maximum Dictionary Size
Maximum String Size
Break Selection
DFV
DFV
DFV
Timed
Default Length
DFV
DFV
DFV
DFV
DFV
DFV
3
0
1
0
1
2
1
0
1
0
1
1
2
0
512 - 65535
6 - 250
0
1
2
3
0
1
0
1 - 254 x x
0
8
9
10
5
6
3
4
7
0
1
2
None
Initiating MRe
Initiating MRd
Initiating Cre, low power
Initiating Cre, high power
Initiating CRd
Initiating ESi
Responding MRd, low power
Responding MRd, high power
Responding CRd
Responding ESr
Hexadecimal octet coded string
Hexadecimal octet coded string
Enable detection of initiating V.8bis signals
Enable detection of responding V.8bis signals
Enable detection of both V.8bis signals
Disable detection of V.8bis messages
Enable detection of V.8bis messages
No delay between tx V.8bis signal and message
1.5 second delay between tx V.8bis signal and message
Disabled
Enabled
No Compression
Tx Only
Rx Only
Both Direction, Accept any direction
Do not disc if V.42bis not negotiated as per Direction
Disconnect if V.42bis not negotiated as per Direction
Default is 2048
Default is 32
Ignore
Non-Expedited and Non-Destructive
Expedited and Non-Destructive
Expedited and Destructive
Transmission of L-SIGNAL shall not indicate length
Transmission of L-SIGNAL shall indicate length
Do not deliver break to DTE
Break length in .01 seconds (Default is 100)
AT Cmd
+ER
+ES
Function
Error Control Reporting
Originate Request EC Mode
Mode
DFV
DFV
+ES
(cont.)
+ESA
+ETBM
+FCLASS
+FLO
+FMI?
+FMM?
+FMR?
+FPR
+FRH
Originate Fallback EC Mode
Answer Fallback EC Mode
Transparent Sub-Mode Idle
Framed Sub-Mode Idle
Framed Sub-Mode Underrun or Overrun
Half Duplex Control
CRC Type
NRZI Control
Disc Buff Dly - Pending TD
Disc Buff Dly - Pending RD
Disc Buff Dly - Timer
Fax/Modem Mode
Fax Flow Control
Report Manufacturer ID
Report Modem ID
Report Revision #
Fax DTE Rate
Receive HDLC Mode
DFV
DFV
DFV
DFV
DFV
N/A
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
F
Value
6
8
4
5
0
1
2
3
0
0
1
3
4
0
0
1
2
3
4
1
2
6
0
1
0
-
0
1
2
0 - 255
0
1
8
0
1
2
2
0
1
0
0
1
0
3
24
48
72
73
74
-
-
-
Setting
Disabled
Enabled
Direct Mode
Normal Mode
LAPM Only
LAPM or MNP (V42 Detection Phase)
MNP Only
Initiate Synchronous Access Mode when connected
EC Optional, fallback to Normal Mode
EC Optional, fallback to Direct Mode
EC Required (LAPM or MNP)
EC Required (LAPM Only)
EC Required (MNP Only)
Direct Mode
Normal Mode
EC Optional, fallback to Normal Mode
EC Optional, fallback to Direct Mode
EC Required (LAPM or MNP)
EC Required (LAPM Only)
EC Required (MNP Only)
Initiate Synchronous Access Mode when connected
DCE transmits 8 bit SYN sequence on idle.
DCE transmits HDLC flags on idle.
DCE transmits abort on underrun in middle of frame.
DCE transmits a flag on underrun in middle of frame, notifies DTE of underrun or overrun.
Not Used
CRC generation and checking is disabled
In framed sub-Mode 16 bit CRC is generated by the DCE in Tx direction and checked by the DCE in RX direction.
NRZI encoding and decoding is disabled
Discard buffered data and disconnect
Attempt until all data delivered, ignore timer
Attempt until all data is delivered or timer expires
Discard buffered data and disconnect
Attempt until all data delivered, ignore timer
Attempt until all data is delivered or timer expires
Delivery timer in seconds (default is 0)
Data Mode
Fax Class 1 Mode
Voice Mode
-
-
-
None
XON/XOFF
RTS/CTS
Autobaud
V.21 at 300 bps
V.27ter at 2400 bps
V.27ter at 4800 bps
V.29 at 7200 bps
V.17 at 7200 bps with long train time
V.17 at 7200 bps with short train time
AT Cmd
+FRM
+FTH
+FTM
+FTS
+FRS
+GCAP
+GCI
+GCI
(cont.)
Receive Mode
Transmit HDLC Mode
Transmit Mode
Pause Transmission
Wait for Silence
Request Capabilities List
Country of Installation
+GMI?
+GMM?
+GMR?
+IFC
Request Manufacturer ID
Request Model ID
Request Revision #
DCE by DTE Flow Control
+ILRR
Function
DTE by DCE FlowControl
DTE Local Rate Reporting
Mode
F
F
F
F
F
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
Value
3
0
1
0
1
2
2
0
1
A6
A9
AE
B4
B5
-
-
-
82
8B
9C
9F
A0
A5
3D
42
50
57
58
59
6C
7B
04
09
0A
0F
20
2E
31
3C
X
X
X
0 - 255
0 - 255
-
00
96
97
98
121
122
145
146
Setting
V.29 at 9600 bps
V.17 at 9600 bps with long train time
V.17 at 9600 bps with short train time
V.17 at 12000 bps with long train time
V.17 at 912000 bps with short train time
V.17 at 14400 bps with long train time
V.17 at 14400 bps with short train time
Same values as +FRH
Same values as +FRH
Same values as +FRH
10ms Intervals
10ms Intervals
-
Japan
Germany
Australia
Austria
Belgium
Canada
Czech Republic
Denmark
Finland
France
Germany (yes, again)
Hong Kong
Ireland
Israel
Italy
Malaysia
Netherlands
Norway
Portugal
Singapore
South Africa
Spain
Sweden
Switzerland
Thailand
Turkey
-
-
United Kingdom
USA
-
None
XON/XOFF no pass through
RTS
XON\XOFF pass through
None
XON/XOFF
CTS
Disable
Enable
AT Cmd
+ITF
+MS
+MS
+MR
+VCID
+VDR
+VEM
+VGR
+VGT
+VIP
+VLS
+VNH
+VPR
+VRA
+VRN
+VRX
+VSD
+VSM
Function
Tx Flow Off Threshold
Tx Flow On Threshold
Carrier
Automode
Min Rate (Tx)
Max Rate (Tx)
Min Rx Rate
DFV
DFV
DFV
Max Rx Rate
DFV
Modulation Reporting Control
DFV
Caller Identification Enable
Distinctive Ring Enable
DFV
DFV
DFV
Distinctive Ring Report
Event Reporting Control
Receive Gain Selection
Transmit Volume Selection
Initialize Voice to Default
Analog Source Selection
DFV
V
V
V
V
V
Automatic Hang-Up Control
Voice DTE-DCE Rate
Ringback Goes Away
Ringback Never Appeared
Enter Voice Receive Mode
Silence Detection: Level
Silence Detection: Duration
Voice Comp: Method
V
V
V
V
V
V
V
Mode
DFV
DFV
DFV
DFV
Value
0
1
0
1
0
1
0 x
0 x
0 x
0 x
0 - 2047
1 - 2047
V21
V22
V22B
V23C
V32
V32B
V34
VPCM
B103
0
1
0
1 - 255
Bit-Mapped
128
128
-
0
1
8
9
11
13
0
1
2
0
0 - 255
0 - 255
0
1
0
128
0
1 - 255
128
Setting default is 255 octets default is 255 octets
V.21
V.22
V.22bis
V.23
V.32
V.32bis
V.34
56K
Bell 103
Disabled
Enabled
Minimum defined by Carrier x = rate (default is 300)
Maximum defined by Carrier x = rate (default is 33600)
Minimum defined by Carrier x = rate (default is 300)
Maximum defined by Carrier x = rate (default is 60000)
Disable
Enable
Disable
Enable
Disable
Enable
No RING displayed
RING displayed after delay (10ms units)
32 bit event mask. Bit positions described in table D
-
DCE on-hook
DCE off-hook, DCE connected to Telco
DCE on-hook, DCE connected to Speaker
DCE off-hook, DCE connected to Telco and Speaker
DCE on-hook DCE connected to Microphone
DCE off-hook, DCE connected to Telco, Speaker, and
Microphone
Retain Automatic Hang-Up
Disable DCE Initiated Automatic Hang-Ups
Disable all Automatic Hang-Ups
Autobaud
0.1 second increments (default of 50)
0.1 second increments (default of 10)
Periodic tones while recording
Periodic tones while recording use +VSM value. If 0, use 128 medium
Disable
0.1 second increments (default of 50)
PCM
S46
S54
S56
S58
S59
S62
S67
S69
S70
S71
S75
S6
S7
S8
S10
S11
S12
S1
S2
S3
S4
S5
+VTD
+VTX
+VTS
S0
S14
S16
S18
S21
S22
S23
S34
AT Cmd Function
Voice Comp: Sample Rate
Voice Comp: Silence Level
Voice Comp: Silence Exp
Beep Tone Duration
Enter Voice Transmit Mode
DTMF and Tone Generation
Auto Answer
Ring Count
Escape Character
Carriage Return
Line Feed
Backspace
Blind Dial
Call Time-out
Pause Delay
DCD Loss Disconnect
Tone Length
Escape Code Guard Time
Status, Bitmapped
Status, Bitmapped
Test Timer
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
V.34 Control
Mode Value
1 - 255
0 - 255
0 - 255
60 - 255
0 - 255
-
-
0 - 255
-
-
-
0 - 255
129
8000
0
0
0 - 255
-
Multi-Parameter
0 - 255
-
0 - 255
0 - 127
0 - 127
0 - 127
0 - 255
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
V
V
V
V
V
V
DFV
Enable &F=n
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
V.PCM equalizer range
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV
DFV 0
1
2
-
-
-
0 - 255
-
-
-
-
-
-
8
9
10
5
6
3
4
7
Setting
ADPCM
8000Hz
Disable
Disable
0.01 second increments (default of 100)
-
Parameters described in table E
Default = 0
-
Default = 43 (+)
Default = 13 (CR)
Default = 10 (LF)
Default = 8 (BS)
Default = 2 (Units = Seconds)
Default = 30 (Units = Seconds)
Default = 2 (Units = Seconds)
Default = 14 (Units = 0.1 Seconds)
Default = 72 (Units = 0.001 Seconds)
Default = 50 (Units = 0.02 Seconds)
See Appendix B
See Appendix B
Default = 0 (Units = Seconds)
See Appendix B
See Appendix B
See Appendix B bit 0: 0 = expanded constellation bit 0: 1 = minimum constellation bit 1: 0 = nonlinear encoder disabled bit 1: 1 = nonlinear encoder enabled bit 2: 0 = precoding disabled bit 2: 1 = precoding enabled
220 taps
240 taps
260 taps
280 taps
300 taps
320 taps
340 taps
360 taps
Default = 6
Default = 2 (Bit-mapped)
See Appendix B
See Appendix B
See Appendix B
See Appendix B
See Appendix B
See Appendix B
See Appendix B
See Appendix B
See Appendix B
160 taps
180 taps
200 taps
AT Cmd
S76
S77
Function
V.PCM RSSE states
V.PCM control
S80
S81
S88
S91
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Status, Bitmapped
Mode
DFV
DFV
Value
11
12
0
1
0 - 255
DFV
DFV
DFV
DFV
-
-
-
-
Setting
380 taps
400 taps
2 states
4 states bit 0: 0 = infidelity training off bit 0: 1 = infidelity training on bit 1: 0 = timing without limiter bit 1: 1 = timing with limiter bit 2: 0 = mu-law companding bit 2: 1 = A-law companding
Default = 2
See Appendix B
See Appendix B
See Appendix B
See Appendix B
Table A: Country Codes for AT&F=N
N Country N Country
1 USA 9 Czech
Repub
3 Australia 10 Denmark/TB
R
4 Austria 11 Finland
5 Belgium 12 France
6 Brazil/UI 13 Germany
7 Canada
N Country
15 Hong
Kong
18 Ireland
19 Israel
20 Italy
21 Japan
N Country
23 Malaysia
N
34
Country
Sweden
25 Netherlands 35 Switzerlan d
27 Norway
30 Portugal
33 Spain
38
40
41
UK
S. Africa
Turkey
Table B: EIA Status (AT*CT)
Bit #
4
5
6
7
0
1
2
3
Definition
RTS
CTS
DSR
DCD
SQA (N/A)
DTR
RI
TIA (N/A)
On=1, Off =0
Table C: Disconnect Codes
35
36
37
38
39
25
26
27
28
21
22
23
24
17
18
19
20
13
14
15
16
29
30
31
32
33
34
6
7
4
5
2
3
0
1
8
9
10
11
12
Code Reason Cod e
None
DTR Drop
ATH Received
Remote Disconnect
Manager Request
Major Strap Change
Restoral - Manager
End Restoral - manager
Mimic
Talk/Data
End Restoral - DTR
End Restoral - 116
Off-line Test
Training Failure
Security Failure - Invalid PW
Security Callback
End Restoral - Auto
EC Local Request
Already Connected
Dial Aborted
Busy Tone Detected
No Dialtone
Long Space Detected
Dial Aborted - Incoming Call
Improper DTR State
Phone Number Blacklisted
Retrain Threshold
Ans-Orig Pin Change
No Stored Number To Dial
In Test Mode
Callback In Progress
FSK Sync Invalid
Semicolon Detected
ABT Time-out - No Ring Back 73
ABT Time-out - Ring Back
Received
74
ABT Time-out - No Call Progress 75
69
70
71
72
ABT Time-out - No Answer
Busy After Ring Back
Denied Manager Down
EC - Retransmission Limit
76
77
78
79
80
65
66
67
68
61
62
63
64
57
58
59
60
53
54
55
56
44
45
46
47
40
41
42
43
48
49
50
51
52
Reason
EC - Remote Requested
EC - No Valid Packet Received
EC - Establishment Error
EC - Acceptor Time Out
EC - Negotiation Failure
EC - Protocol Violation
EC - Bad Parameter
EC - Data Compression Failure
FSK Reliable Invalid
Restoral - DTR
Restoral - 116
Restoral - Auto
Restoral - Answer
Restoral - Talk/Data
End Restoral - Talk/Data
End Restoral - DTOL Time-out
Lease Line Test
Lease Line Test - Manager
Lease Line Test Failed
External Option Set Selected
Option Set Selected - ATZ
Lease Line Test Passed
Security Failure - No Callback Number
Security Failure - Manager Time Out
Security Failure - Callback Invalid
Security Failure - Interdigit Time Out
DTE Inactivity Time-out
Restoral - ACU
End Restoral - ACU
Restoral - DTR ACU
End Restoral - DTR ACU
Restoral - 116 ACU
End Restoral - 116 ACU
LPDA2 Disconnect
EC Remote No PSTN
Strap Change
Retrain Time-out
Remote Access Reset
Voice Disconnect - VLS=0
Voice to Fax/Data Switch
Unknown
Table D: Bit Positions of Supported Events
Bit
10
18
19
6
7
9
0
2
3
4
5
20
23
25
27
Event
Caller ID
Distinctive Ring
RING
DTMF Detection
Receive Buffer Overrun
Fax Calling (1100 Hz.)
Data Calling (1300 Hz.)
Presumed Hang-Up (SILENCE) Time-out
Presumed End-of-Message (QUIET) Time-out
RINGBACK
BUSY
DIALTONE
Playback Buffer Underrun
Fax or Data Answering Modem detected
Voice Detected
Table E: Parameter Types for AT+VTS
Type Meaning
D
{D,d}
D = DTMF tone for default duration
D=DTMF tone, d=duration
[F1,F2,d] F1=Frequency 1, F2=Frequency 2, d=duration
Note: Any number of parameters can occur on a single line, separated by commas.
If no DTMF tone or Frequency is given, then silence is generated for the given duration.
Appendix B - Status S-Registers
S14
__________________________________________________________________________
Bit Value Command Description
1
2 0
1
0
1
E
E1
Q
Q1
Local character echo off
Local character echo on
Response messages on
Response messages off
3 0
1
V
V1
Response messages as digit codes
Response messages as words
7,6 00 &P Make/Break ratio 40/60
10
01
&P1
&P2
Make/Break ratio 33.5/66.5
Make/Break ratio 38.5/61.5
______________________________________________________________________________
S16
__________________________________________________________________________
Bit Value Command Description
0 0
1
Analog loopback inactive
Analog loopback in progress
______________________________________________________________________________
S21
- EIA
Signals_______________________________________________________________
Bit Value Command Description
2
4,3
5
0
1
0
1
00
01
10
11
&R
&R1
&D
&D1
&D2
&D3
&C
&C1
CTS follows RTS (Normal)
CTS always on (High)
Ignore DTR
On-to-off, enter command mode
On-to-off, disconnect call
On-to-off, reset to default configuration
DCD always on (High)
DCD in data mode only
6 0
1
&S
&S1
DSR always on (High)
DSR on while On-Line
______________________________________________________________________________
S22
__________________________________________________________________________
Bit Value Command Description
1,0 00
01
10
11
L
L1
L2
L3
Speaker volume low
Speaker volume low
Speaker volume medium
Speaker volume high
3,2 00
01
10
11
M
M1
M2
M3
Speaker off
Speaker on until carrier detect
Speaker on until carrier detect
Speaker off when modem is dialing
6-4 000 X
001 X1
CONNECT message only, blind dials, no busy detect
CONNECT/rate code, blind dials, no busy detect
010 X2
011 X3
CONNECT/rate code, waits for dial tone, no busy detect
CONNECT/rate code, blind dials, reports BUSY
100 X4 CONNECT/rate code, waits for dial tone, reports BUSY
______________________________________________________________________________
S23
- Guard
Tone_______________________________________________________________
Bit Value Command Description
7,6 00
01
10
&G
&G1
&G2
Guard tone off
Guard tone 550Hz
Guard tone 1800Hz
______________________________________________________________________________
S54
- Flow
Control______________________________________________________________
Bit Value Command Description
1,0 00
01
11
\Q
\Q1
\Q3
DTE flow control disabled
DTE flow control enabled, XON/XOFF
DTE flow control enabled, RS/CTS
3 0
1
\G
\G1
DCE flow control disabled
DCE flow control enabled
______________________________________________________________________________
S56
- Compression
Control________________________________________________________
Bit Value Command Description
1,0 00
11
%C
%C1
Data compression disabled
Data compression enabled
______________________________________________________________________________
S58
- Inactivity
Timer____________________________________________________________
Bit Value Command Description
7-0 0 \T
1-255 \T(n=1-255)
Disabled
Timer value in Minutes
______________________________________________________________________________
S59
- Break
Control______________________________________________________________
Bit Value Command Description
2-0 001 \K1
011 \K3
Destructive and expedited
Non-destructive and expedited
101 \K5 Non-destructive and non-expedited
______________________________________________________________________________
S62
- Disconnect Buffer
Delay_____________________________________________________
Bit Value Command Description
7-0 0 %D Buffer disabled
1-255 %D(n=1-255) Disconnect buffer delay value (seconds)
______________________________________________________________________________
S67
- Link Speed Status________________________________________________
Bit Value Command Description
5-0
001110
001111
010000
010001
010010
010011
010100
010101
010110
010111
011000
011001
011010
011011
000001
000010
000011
000100
000111
000101
000110
001000
001001
001010
001011
001100
001101
011100
011101
011110
011111
100000
100001
300 bps
600 bps
1200 bps
2400 bps
4800 bps
7200 bps
9600 bps uncoded
9600 bps trellis
12000 bps
14400 bps
16800 bps
19200 bps
21600 bps
24000 bps
26400 bps
28800 bps
31200 bps
33600 bps
32000 bps
34000 bps
36000 bps
38000 bps
40000 bps
42000 bps
44000 bps
46000 bps
48000 bps
50000 bps
52000 bps
54000 bps
56000 bps
58000 bps
60000 bps
______________________________________________________________________________
S69
- DCE Speed________________________________________________
Bit Value Command Description
5-0 00001 %B1
00011 %B2
00100 %B3
00111 %B4
00010 %B5
00110 %B6
01000 %B7
01001 %B8
01010 %B9
01011 %B11
01100 %B12
01101 %B13
01110 %B14
01111 %B15
10000 %B16
10001 %B17
10010 %B18
010011
010100 %B20
010101 %B21
010110 %B22
010111 %B23
011000 %B24
011001 %B25
011010 %B26
011011 %B27
011100 %B28
011101 %B29
011110 %B30
011111 %B31
100000 %B32
100001 %B33
%B19
300 bps
1200 bps
2400 bps
4800 bps
600 bps
9600 bps
7200 bps
12000 bps
14400 bps
16800 bps
19200 bps
21600 bps
24000 bps
26400 bps
28800 bps
31200 bps
33600 bps
32000 bps
34000 bps
36000 bps
38000 bps
40000 bps
42000 bps
44000 bps
46000 bps
48000 bps
50000 bps
52000 bps
54000 bps
56000 bps
58000 bps
60000 bps
______________________________________________________________________________
S70
- Operating
Mode____________________________________________________________
Bit Value Command Description
2-0 000 \N
001 \N1
Normal
Direct
100 \N4
110 \N6
LAPM Only (Reliable)
Reliable
111 \N7 Auto Reliable
_____________________________________________________________________________
S71
- Operating Mode
Status_______________________________________________________
Bit Value Command Description
3-0 0000
0001
0010
0011
0100
Protocol not active
Protocol negotiation in progress
MNP level 2 active
MNP level 3 active
MNP level 4 active
0101
0110
0111
MNP level 5 active - MNP with data compression
LAPM active
LAPM with data compression active
1000 MNP level 1 active
_____________________________________________________________________________
S80
- Serial Port
Speed___________________________________________________________
Bit Value Command Description
4-0 00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
300 bps
600 bps
1200 bps
2400 bps
4800 bps
7200 bps
9600 bps
12000 bps
14400 bps
16800 bps
19200 bps
21600 bps
24000 bps
26400 bps
01111
10000
10001
10010
28800 bps
38400 bps
57600 bps
115200 bps
______________________________________________________________________________
S81
- Minimum DCE
Speed________________________________________________________
Bit Value Command Description
5-0 00001 %L1
00011 %L2
00100 %L3
00111 %L4
00010 %L5
00110 %L6
01000 %L7
01001 %L8
01010 %L9
01011 %L11
01100 %L12
01101 %L13
01110 %L14
01111 %L15
10000 %L16
10001 %L17
10010 %L18
010011
010100 %L20
010101 %L21
010110 %L22
010111 %L23
011000 %L24
011001 %L25
011010 %L26
011011 %L27
011100 %L28
011101 %L29
011110 %L30
011111 %L31
100000 %L32
100001 %L33
%L19
300 bps
1200 bps
2400 bps
4800 bps
600 bps
9600 bps
7200 bps
12000 bps
14400 bps
16800 bps
19200 bps
21600 bps
24000 bps
26400 bps
28800 bps
31200 bps
33600 bps
32000 bps
34000 bps
36000 bps
38000 bps
40000 bps
42000 bps
44000 bps
46000 bps
48000 bps
50000 bps
52000 bps
54000 bps
56000 bps
58000 bps
60000 bps
____________________________________________________________________________
S88
- Modulation
Type___________________________________________________________
Bit Value Command Description
4-0 00000 *MM0
00001 *MM1
00010 *MM2
00101 *MM5
01011 *MM11
V.34 Automode
V.21
B103
V.22 bis
V.32 bis
01100 *MM12
10000 *MM10
10001 *MM6
V.34
V.32
V.23
10010 *MM4
10100 *MM13
B212
V.PCM
10101 *MM14 V.PCM Auto
______________________________________________________________________________
S91
- Current
Modulation_________________________________________________________
Bit Value Command Description
4-0 00000
00001
00010
00101
00110
01000
01011
01100
10000
10001
10010
10011
V.34 Automode
V.21
B103
V.22 bis
V.27 ter
V.29
V.32 bis
V.34
V.32
V.23
B212
V.17
10100
10101
V.PCM
V.PCM Auto
______________________________________________________________________________
Appendix C - Connect Message Codes
Connect Message Codes for Numeric Format
Verbose
"26400"
"28800"
"31200"
“ 32000”
"33600"
“ 34000”
“ 36000”
“ 38000”
"38400"
"40000"
"42000"
"44000"
"46000"
"48000"
" "
"300"
“ 600”
"1200"
"2400"
"4800"
"7200"
"9600"
"12000"
"14400"
"16800"
"19200"
"21600"
"24000"
"50000"
"52000"
"54000"
"56000"
"57600"
“ 58000”
“ 60000”
"115200"
Numeric
"34"
"41"
"42"
"44"
"46"
"48"
"29"
"30"
"31"
“ 37”
"32"
“ 38”
“ 39”
“ 40”
"23"
"24"
"25"
"26"
"27"
"28"
"1"
"20"
“ 13”
"5"
"10"
"11"
"22"
"12"
"50"
"52"
"54"
"56"
"35"
“ 58”
“ 60”
"36"
Note: First row of this table represents the code displayed when call progress is set to 0.
When call progress is 0, no rate is displayed in the connect message, only the word
"CONNECT", which is represented by the numeric code "1". For all other call progress settings, the rate information is displayed and reflected in the numeric code displayed.
Appendix D - Connect Message Examples
The following table shows a few examples of how the long-form connect message will look, based upon the settings of the /V (connect message) and X (call progress) strap settings.
Example Long-Form Connect Messages
/V0
/V0
/V1
/V1
/V2
/V2
/V3
/V3
/V4
/V4
X0
X1
X0
X1 CONNECT 19200/V42/V42BIS
X0 CONNECT
X1
X0
X1
X0
X1
38400 DTE, 28800 DCE Reliable
CONNECT
CONNECT 19200
CONNECT
CONNECT 28800
CONNECT
CONNECT 28800/V42/V42BIS
CONNECT
CONNECT 28800/V34/V42/V42BIS
19200 DTE, 9600 DCE Normal
CONNECT
CONNECT 19200
CONNECT
CONNECT 19200
CONNECT
CONNECT 9600
CONNECT
CONNECT 9600
CONNECT
CONNECT 9600/V32
Note: Call Progress settings of 2,3, and 4 will display the same connect message format as the setting of 1.
Appendix E - Homologation Testing Command
Homologation Automated Test Options
This command is a special test hook that causes the modem to go off-hook and generate a continuous signal. In order to enable this command you must first type the command ATS46=0.
The signal that is specified by the AT*HO options is sent over the modem line interface as long as AT*HO is set to a non-0 option. This capability is necessary for measuring the inband and outband noise condition for each signal.
Spectrums
Spectrums are affected by the transmit level and other options.
DTMF
When DTMF is selected, the modem goes off-hook and generates the digit specified as option 2.
This is a continuous DTMF signal (no off time). It is necessary to characterize the inband and outband noise.
The AT*HO command takes between 1 and 4 option parameters.
This command has the format:
AT*HOa,b,c,d where: a = a parameter 1 option b = a parameter 2 option c = a parameter 3 option d = a parameter 4 option
Examples:
AT*HO1,15,0,1 represents V.21, -15dB, Answer Band, Space
AT*HO12,4 represents DTMF, digit 4
Parameter 1 Parameter 2
(Tx Level)
Parameter 3
Option Description Option Description Option Description
0
1
2
3
Normal
V.21
Bell 103
V.23
9 to 20 -9 to -20 dB 0
1
9 to 20 -9 to -20 dB 0
1
9 to 20 -9 to -20dB 0
1
2
Answer Band
Originate Band
Answer Band
Originate Band
Forward (1200)
Forward (600)
Backward (75)
0
1
0
1
0
1
2
Parameter 4
Optio n
Description
Mark
Space
Mark
Space
Binary 1
Binary 0
Pattern
Parameter 1 Parameter 2
(Tx Level)
Parameter 3
Option Description Option Description Option Description
5
6
7
8
10
11
12
13
14
15
V.22
9 to 20 -9 to -20 dB 0
1
2
3
V.27
V.29
V.17
V.32bis
9 to 20 -9 to -20 dB 0
1
9 to 20 -9 to -20 dB 0
1
9 to 20 -9 to -20 dB 0
1
2
3
9 to 20 -9 to -20 dB 0
3
4
1
2
V.34
DTMF
9 to 20 -9 to -20 dB 0
1
2
5
6
3
4
11
12
13
7
8
9
10
0 to 9
A to D
#
*
Calling Tone 9 to 20 -9 to -20 dB 0
1
Answer Back
Tone
Quiet Mode
1100
1300
Parameter 4
Orig. Band -1200 bps
Ans. Band - 1200 bps
Orig. Band - 2400 bps
Ans. Band - 2400 bps
2400 bps
4800 bps
2400 bps
4800 bps
7200 bps
9600 bps
12000 bps
14400 bps
16800 bps
19200 bps
21600 bps
24000 bps
26400 bps
28800 bps
31200 bps
33600 bps
7200 bps
9600 bps
7200 bps
9600 bps
12000 bps
14400 bps
4800 bps
7200 bps
9600 bps
12000 bps
14400 bps
5
10
13
14
15
0
3
4
0
1
2
Optio n
Description
No Guard Tone
550 Guard Tone
1800 Guard Tone
2400 baud - high channel
3000 baud - high channel
3200 baud - high channel
3429 baud - high channel
2400 baud - low channel
3000 baud - low channel
3200 baud - low channel
3429 baud - low channel
"This equipment has been approved to [Council Decision 98/482/EC - "CTR 21"] for pan-
European single terminal connection to the Public Switched telephone Network (PSTN).
However, due to differences between the individual PSTNs provided in different countries, the approval does not, of itself, give an unconditional assurance of successful operation on every
PSTN termination point.
In the event of problems, you sholud contact your equipment supplier in the first instance"
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