Usr USR5686G-PRO User Manual

USR® Courier® Lite Business Modem

User Guide

USR5686G-PRO

R24.0802.00

Rev 1.0 06/2018

5686G-PRO User Guide

Contents

INTRODUCTION ................................................................................................................ 3

INSTALLATION .................................................................................................................. 4

Modem Installation ......................................................................................................... 4

Modem Upgrade ............................................................................................................. 7

CONFIGURATION ............................................................................................................. 11

Configuring DIP Switches .............................................................................................. 11

Accessing and Configuring the Modem Remotely .............................................................. 12

Dial Security ................................................................................................................ 18

Testing the Connection ................................................................................................. 28

REFERENCE .................................................................................................................... 32

S-Registers ................................................................................................................. 32

Alphabetic Command Summary ..................................................................................... 46

Flow Control Template .................................................................................................. 66

Result Code Meanings and Sets ..................................................................................... 71

Technical Information ................................................................................................... 75

ASCII Chart ................................................................................................................. 80

Fax Information for Programmers .................................................................................. 81

Viewing LEDs ............................................................................................................... 84

WARRANTY ..................................................................................................................... 85

REGULATORY .................................................................................................................. 89

COPYRIGHT .................................................................................................................... 94

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INTRODUCTION

Thank you for purchasing the USRobotics Courier Lite 56K Business Modem!

The USR® Courier® Lite 56K Business Modem with V.Everything® technology offers the perfect solution for both Out -of-Band Management of networks or Point-of-Sale applications. Many modems claim reliability, but few match the real-world performance of Courier modems. Even fewer offer the multitude of advanced business features found on this modem including Carrier Loss Redial and Dialback Security. Remote access capabilities let you remotely configure or troubleshoot modems in Remote Management and other M2M (Machine -to-Machine) applications. When failure is not an option, you need the world-class capabilities that only come from the top of the USR product line.

Product Features

V. Everything Technology

The modem supports all key ITU analog communications protocols and many proprietary ones to provide you with ultimate compatibility.

Dial and Dialback Security

The modem includes a robust mechanism for providing dial and dialback security for your network. See the “Dial Security” part of the Configuration section of this guide.

Remote Manageability

The modem can be remotely configured and monitored for the convenience of your local office. See the “Accessing and Configuring Remotely” part of the Configuration section of this guide.

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INSTALLATION

Modem Installation

Physical Features

Top

1. Power Switch

2. LEDs

Back

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Side

3. Line to wall jack

4. Line to telephone

5. DIP switches

6. Serial port

7. Power input

8. Volume dial

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Step One: Prepare for Installation

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1. Uninstall all other modems

that are installed on your computer. For instructions, refer to the

documentation for your previous modem or your computer’s operating system.

2. Unplug all data, telephone, and power cords connected to your previous modem(s).

3. Shut down your computer and power it off.

4. Locate the serial port on the back of your computer. To find the serial port, look for a port

labeled COM, MODEM, RS-232, , or SERIAL. Do not use the AUX, GAME, LPT, or PARALLEL

ports.

Note: If your computer does not have a serial port, use a USB-to-serial cable that is compatible with

your computer’s operating system.

*If the previous modem was a USRobotics Courier 56K Business Modem , do not uninstall it. The

Courier Lite 56K Business Modem uses the same driver a s the Courier 56K Business Modem.

Step Two: Connect the Modem to the Computer

1. Connect one end of the serial modem cable to modem and the other end to your computer’s

serial port.

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Step Three: Connect the Modem to an Analog Telephone Line

Caution: The Courier Lite 56K Business Modem must be plugged in to an analog phone line only.

Plugging your Courier Lite 56K Business Modem in to a digital phone line may damage the modem. Most office phones are wired through digital lines. Be sure you know what type of line you have.

1. Plug one end of the telephone cord into the jack on the modem.

2. Plug the other end into an analog telephone wall jack.

3. To connect a telephone through the modem, plug the telephone’s cord into the

modem’s jack.

Step Four: Power Up the Modem

1. Plug the power adapter into the power jack on the modem and the other end into an

electrical outlet.

2. Turn on the modem by switching the power switch on the top of the modem to ON.

The CS LED should light.

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If the CS LED does not light or if other LEDs light, make sure that only DIP switches (located on the back of the modem) 3, 5, and 8 are in the ON (down) position.

3. Turn on your computer.

Step Five: Install the Modem Drivers

Windows operating systems should automatically install the modem driver. If the driver does not install automatically, or for other operating systems, visit http://www.usr.com/support.

Uninstallation

Consult your computer’s operating system documentation for uninstallation procedures.

Modem Upgrade

Upgrading your Modem

This section contains information about:

 Checking your modem’s software version  Getting new operating software  Getting the Flash Loader application  Use the Flash Loader application to send the new software to your modem  If the Flash Loader doesn’t find your modem  If your modem doesn’t respond after flashing  Remote flash

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ATI7

USRobotics Courier Lite Configuration Profile...

Product type

US/Canada External

Product ID

00568607

Options

V32bis,V.80,V.34+,V.90,V.92

Fax Options

Class 1,Class 2.0

Clock Freq

92.0Mhz

Flash ROM

256k

Ram

96k

Supervisor date

May 2 2018

DSP date

May 2 2018

Supervisor rev

V1.0.0

DSP rev

DAA rev

Serial Number

xxxxxxxxxxxx

Checking Your Modem’s Software Version

Issuing the ATI7 command produces the following information to appear on your terminal screen.

Check the Supervisor and Digital Signal Processor (DSP) dates found in the screen display. These dates will determine which version of the software your modem is using.

Getting New Operating Software

To get the newest version of the Courier Lite 56K Business Modem ’s operating software, go to the customer support web site at http://www.usr.com/support.

Getting the Flash Loader Application

To flash new firmware into the Courier Lite 56K Business Modem , you must run the USRobotics Flash Loader application on your computer.

To get the newest version of the Flash Loader application, go to the customer support web site at http://www.usr.com/support.

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Use the Flash Loader Application to Send the New Software to Your Modem

Run the Flash Loader application.

Navigate to the new software file.

After you choose the software file that you want to send, the Flash Loader will search your computer’s COM ports for the Courier Lite 56K Business Modem .

Note: There must be no other active modems on any of your computer ’s COM ports.

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Once the Flash Loader selects the COM port, it will send the file to the modem.

If the Flash Loader Doesn’t Find Your Modem

If the Flash Loader doesn’t find your modem during the flash process :

 Check that your computer has no other active modems on any of its COM ports. Don’t forget to

disable any internal modems in your computer.

 Manually verify that the Courier Lite 56K Business Modem is active by using a serial terminal

application. (e.g. PuTTY, Tera Term, RealTerm, etc.) Select the COM port of the Courier Lite 56K Business Modem. Type AT and Enter. The modem should respon d OK.

If the modem doesn’t respond OK:

A. Check that you’re using the correct COM port that your computer has assigned to the Courier

Lite 56K Business Modem.

B. Check that the Courier Lite 56K Business Modem power is ON. C. Check that the serial cable connecting the computer’s serial port to the Courier Lite 56K

Business Modem is wired with all the RS232 control signals. (i.e. DTR, DSR, CTS, RTS)

 Contact USR Technical Support.

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To do this

Set DIP Switch

To this setting

Set DTR to Normal

OFF (Default)

Ignore DTR

Set verbal result code display

OFF (Default)

Set numeric result code display

Disable result codes

OFF

Enable result codes

ON (Default)

If Your Modem Doesn’t Respond After Flashing

If your modem doesn’t respond after the flash process, the new software file may be corrupt. Try downloading it again from the USR support website. Then send that file to the Courier Lite 56K Business Modem using the Flash Loader.

If your modem still doesn’t respond, contact USR Technical Support.

Remote Flash

Flashing software into a remote Courier Lite 56K Business Modem is not supported.

CONFIGURATION

Configuring DIP Switches

Locating DIP Switches

On the Courier Lite 56K Business Modem, the DIP switches are on the back of the unit. The default setting is DIP switches 3, 5, and 8 are ON (in the down position).

Using DIP Switches to Configure your Courier Lite 56K Business Modem

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To do this

Set DIP Switch

To this setting

Enable the echo in offline commands

OFF (Default)

Disable the echo in offline commands

Enable auto answer

OFF

Disable auto answer

ON (Default)

Normal Carrier Detect

OFF (Default)

Carrier Detect always on

Load Y0-Y4 configuration that is stored in non -volatile memory (NVRAM)

OFF (Default) Load the &F0 configuration from read-only memory (ROM)

Disable AT commands

OFF

Enable AT commands

ON (Default)

Local

The device that is directly connected to the com puter you are using.

Remote

The device at the other end of a telephone connection.

Host

The Courier Lite 56K Business Modem that will be accessed and controlled by other devices.

Guest

The device that will access and control the host Courier Lite 56K Business Modem.

Accessing and Configuring the Modem Remotely

This section contains information about:

 Setting Up Remote Access  Accessing The Host  Quitting a Remote Access Session

Overview

You can set up the Courier Lite 56K Business Modem so other devices can view or change its configuration remotely.

You should be familiar with these terms before you continue:

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To allow guest users to

Use this command to assign a remote-access password

View the Courier Lite 56K Business Modem’s configuration.

AT%P0=password

View and change the Courier Lite 56K Business Modem’s configuration.

AT%P1=password

Setting Up Remote Access

At the Host Courier Lite 56K Business Modem

1. Prepare to send AT commands by putting your communications software in Terminal Mode.

2. Enable remote access.

Set Register S41 for a value of 1 or greater. S41 sets the number of login attempts available to the remote user. A setting of zero allows no login attempts disabling remote access.

Example: Sending ATS41=1&W allows for 1 login attempt by a remote user.

3. Set one or two remote -access passwords.

You can set two passwords to allow different levels of access to each Courier Lite 56K Business Modem.

Example: Sending AT%P1= wombat will allow a remote user to log in with the password "wombat." The user can view and change the Courier Lite 56K Business Modem’s configuration.

Note: Remote-access passwords can be up to eight alphanumeric characters long, and are not case sensitive.

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For your modem to

Command

Display a view-only password

AT%P0?

Display a view-and-change password

AT%P1?

Erase a view-only password

AT%P0=

Erase a view-and-change password

AT%P1=

Disable remote access entirely

ATS41=0

Other Remote-Access Commands

The table below is a list of remote -access configuration commands.

Example: Sending AT%P1= will erase the view and change password.

WARNING: If you erase the %P1 password without disabling remote access (using ATS41=0), anyone

could access the Courier Lite 56K Business Modem and change its configuration.

Accessing The Host at the Guest Device

The guest device requires no configuration to access the host. Follow these steps:

1. Be sure that the host device has enabled remote access and is set to auto -answer (ATS0=1).

Know the password, if you will need one.

2. Call the host device (although it doesn’t matter which device originates the call).

3. After a connection is established, do this:

Pause 4 seconds.

Type 4 tildes: ~~~~

Pause 4 seconds.

Note: The administrator of the host device can change the remote -access character using SRegister 42, and the pause duration using S-Register 43. Refer to the S-Registers section for more information.

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If you have this access privilege

You can use

View-only

Any of the inquiry (ATI) commands

View and Configure

Any of the Courier Lite 56K Business Modem commands, except those that cannot be used while online (for example, ATD or ATA). You can also use remote configuration commands. See the next section for examples.

4. You should see a display similar to this:

U.S. Robotics Courier 56K Business Remote Access Session Serial Number 000000A000000001

Password (Ctrl-C to cancel)?

There is a three minute time limit for entering the password. If the num ber of unsuccessful login attempts exceeds the set limit, the host device returns online and refuses any further login attempts during the remainder of the connection.

When the host accepts the password, the following message and prompt will appear on your screen:

Remote Access granted Remote->

Note: You may not be prompted for a password. If you aren’t, password security is not active. The following prompt appears on your screen after you type the four tildes:

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Remote Access granted (query only) Remote->

Note: During a remote-access session, the maximum number of characters between carriage returns is 40.

Viewing and Changing the Host’s Configuration

Once you've gained guest access to a host, you can communicate with the host just as if you were entering commands from its attached computer.

Depending on your access privileges, you can use the regular set of Courier Lite 56K Business Modem AT commands.

CAUTION: Be careful not to send ATZ or ATZ! or you will lose the connection!

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To change the host Courier 56K Business Modem’s serial port rate to

Command

To change the host Courier 56K

Business Modem’s serial port rate

Command

110 bps

AT%B0

19200 bps

AT%B7

300 bps

AT%B1

38400 bps

AT%B8

600 bps

AT%B2

57600 bps

AT%B9

1200 bps

AT%B3

76800 bps

AT%B10

2400 bps

AT%B4

115200 bps

AT%B11

4800 bps

AT%B5

230400 bps

AT%B12

9600 bps

AT%B6

To change the data format to

Command

No Parity (8 data bits)

AT%F0

Mark parity (7 data bits)

AT%F1

Odd Parity (7 data bits)

AT%F2

Even parity (7 data bits)

AT%F3

Remote Configuration Commands

There are special commands that can be used only during a remote -access session.

You can change the host Courier 56K Business Modem’s serial port rate by using

the AT%Bn command.

Example: Sending AT%B6 will change the Courier 56K Business Modem’s serial port rate to 9600 bps.

You can use the AT%Fn command to control the data format.

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For your modem to

Command

Defer configuration changes to when the call ends.

AT%C0(Default)

Restore the original configuration. Use this command to cancel any changes made during remote access and restore the original configuration.

AT%C1

Force configuration changes. Use this command to make configuration changes take effect immediately. We do not recommend forcing changes unless it is absolutely necessary because an unreliable connection, or even a loss of connection, may result.

AT%C2

To end the remote-access session

Command

And keep the connection.

ATO

And end the connection.

ATH

End the connection, and reset the host modem.

ATZ

You can use the AT%Cn command to control whether and when to apply changes to the configuration.

Example: Sending AT%C1 will cancel any changes made to the modem during a remote access session and restore it to the original configuration.

Note: Even though, by default (%C0), the changes you make do not take effect until the next connection, the new configuration is reflected immediately in inquiry responses (ATIn). Commands that have been written to NVRAM (using &W) and forced configuration changes (%C2) will not be restored to their previous settings when you send the host AT%C1.

After you make changes to the host’s configuration, the remote- access prompt changes from Remote-> to Remote+>.

If you restore the original configuration using the AT%C1 command, the first prompt is restored, assuring you the original configuration is intact.

Quitting A Remote Access Session

If you want to quit the remote access login before you have entered the password, return online by pressing <Ctrl>C or typing ATO.

After you’ve entered the password, you can quit by sending one of these commands:

Note: Before you disconnect, issue the ATI5 command to the remote modem and check its S41 setting. Make sure S41 is set for a value of 1 or greater. If S41 is set to 0, when you disconnect

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Local

The device that is directly connected to the computer you are using.

Remote

The device at the other end of a telephone connection.

Host

The Courier Lite 56K Business Modem that will be accessed and controlled by other devices.

Guest

The device that will access and control the host Courier Lite 56K Business Modem.

you will not be able to access the remote modem again. To prevent this send ATS41=1&W before you disconnect.

Dial Security

This section contains information about:

 Setting up Dial Security  Maintaining Security Accounts  What The Guest User Needs To Do  Configuring Dial Security Remotely  DTMF Security

Overview

Dial Security is designed to protect networks and data centers from unauthorized access.

You should be familiar with these terms before you continue:

You can configure up to 5 accounts: one administrative account for you and four accounts for guest users. The account profiles are stored in the host Courier Lite 56K Business Modem ’s nonvolatile random access memory (NVRAM).

There are two forms of Dial Security; each will be explained later in this section :

 Autopass  Password Prompting

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Setting up Dial Security

Here is a summary of the steps for setting up Dial Security:

1. Set up an account for yourself

2. Identify your account as the Administrative Acco unt

3. Set up guest-user accounts

4. Enable local (host) security

5. Choose a Dial Security method

6. Enable Dial Security

7. Activate the Dial Security settings

1. Set up an account for yourself

Use any of the 5 available accounts (numbered 0-4) for your account. Use the AT%An command to set up user accounts.

Note: The AT%An command is automatically written to NVRAM. It does not require you to send &W.

WARNING: Do not insert spaces between commas or between fields and commas. Spaces will invalidate the command.

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To make the host Courier Lite 56K Business Modem

Command

Example

Hang up and then dial back a guest device at a specified number.

Expect a pause of approximately 1.5 minutes before the modem dials back. You cannot alter the duration of the pause.

AT%A0=password,y,y,n,1area code and phone number

AT%A0=wombat,y,y,n,1,8475555555

Prompt you to enter a number at which to dial back a device, and then have the Courier Lite 56K Business Modem dial back the device at that number

AT%A0=password,y,y,y,

AT%A0=wombat,y,y,y,

Disable dialback

AT%A0=password,y,n,,

AT%A0=wombat,y,n,,

Dialback options

You can set the Courier Lite 56K Business Modem to automatically dial back a certain number after a guest modem dials in.

Note: Count your commas. There should always be at least four commas in the %A command. Do not insert spaces between commas or between fields and commas. Spaces will invalidate the command.

Note: To enable Dialback, you must enable Dial Security with Prompting. See step 6.

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For your modem to

Command

Example

Identify your account as the Administrative Account

AT%L

AT%L=PW0 This example sets account 0 as the Administrative Account.

For your modem to

Command

Protect the administrative password (local security enabled)

ATS53.2=1

2. Identify your account as the Administrative Account

Once you set the administrative password, you cannot view or modify the guest account profiles unless you enter the correct administrative password.

WARNING: Be sure to remember your administrative password. If you enable Dial Security and then forget your administrative password, you will be locked out of the Courier Lite 56K Business Modem’s dial security features. You will need to restore the factory defaults by setting DIP switch 7 ON. This will erase ALL passwords and you will have to reconfigure all your accounts.

3. Set up guest-user accounts

Use the AT%An command to set up guest-user accounts in the same way you set up your administrative account. You can set up four guest accounts. Refer to the figure in step 1 regarding information about formatting the AT%An command.

After you have enabled the guest accounts, make sure the guest users know their passwords and the log-in procedure.

Modifying accounts

After you have set up an account, you can modify each field independently. If a field is to remain unchanged from its original setting, just insert a com ma as shown:

AT%A1=,,,Y,

The command above allows the guest user to supply a dialback number that is different from the one stored in the original account record.

4. Enable Local Security.

WARNING: If you do not enable Local Security, the Dial Security settings will not be protected

and other users will be able to change or erase them.

Note: You must use the &W command to save the settings in NVRAM. If you don’t, the next time you reset or power off the Courier Lite 56K Business Modem , Dial Security will be disabled.

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5. Decide which Dial Security option to use

You can choose from the two types of Dial Security: Autopass and Password Prompting.

Autopass

Autopass is the default form of password protection. Autopass automates the process of logging in to the host modem, but it requires the guest and host devices to be U.S. Robotics Courier modems.

When a guest device attempts an Autopass connection, the guest includes the password in its V.42 error-control request. The host modem checks all the enabled passwords in its security accounts for a match.

Password Prompting

Password Prompting allows connections with any guest device, as long as the guest user knows the correct password.

When the host has Password Prompting enabled, it asks guest users for a password. The host modem checks the received password against each of its act ive Security accounts.

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When using Autopass Prompting

When using Password Prompting

Both the host and guest devices are made by U.S. Robotics and have Dial Security enabled.

Guest devices don’t have to support U.S.

Robotics Dial Security.

The connection between the Courier Lite 56K Business Modem or modems is under V.42 error control.

(Refer to the Alphabetic Command Summary section for information about using AT&M4 or AT&M5.)

V.42 error-control connections aren’t required.

If the guest includes an invalid password, the host sends an INVALID PASSWORD message and hangs up.

If the guest sends an invalid password, the host prompts twice more before disconnecting.

If the guest does not send a password after 60 seconds, the host disconnects.

If the guest includes a valid password, the host permits a secure connection.

The host will still always respond to a correct Autopass attempt.

If the guest did not enable Dial Security, the host will not accept the call unless prompting is enabled on the host Courier Lite 56K Business Modem.

The table below is a comparison between Autopass and Password prompting.

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For your modem to enable

Command

Autopass Dial Security

ATS53.0=1

Dial Security with Password Prompting (this also enables Autopass)

ATS53.0=1.1=1

Dialback Security, enable Password Prompting and enable Dialback in each guest account

AT%An=password,y,y,y,phone number where n is the account number. See the figure in previous section, Setting Up Dial Security for more information.

6. Enable Dial Security

WARNING: Before you enable Dial Security, you must set up an administrative account and

password. See Steps 1 & 2.

Example: Issuing AT%A3=wombat,y,y,y,5551234 to your modem will enable Password Prompting and Dialback for account 3, which has the password "wombat."

Note: You must use the &W command to save the settings for Enabling Autopass Dial Security

and Dial Security with Password Prompting. If you don’t, the next time you reset or power off the

Courier Lite 56K Business Modem, Dial Security will be disabled.

If you need a reference when setting these commands, you can use the ATI10 command. Refer to the Alphabetic Command Summary section for more information about the ATI10 command.

7. Send ATZ or ATZ! to activate the Dial Security settings.

Note: Make sure that DIP switch 7 is OFF, so the modem loads the settings stored in NVRAM. If

DIP switch 7 is ON, the settings in ROM (&F0) are loaded, disabling dial security. You can retrieve the dial security settings by setting DIP switch 7 OFF and resetting the Courier Lite 56K Business Modem using ATZ or by toggling the power of the modem.

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For your modem to

Command

Access accounts by disabling local security AT%S=administrative password

View account information, once access has been granted. Remote users may only use this command during remote access sessions if local-access security is disabled.

ATI10 Erase local-access password

AT%E=1

Erase Autopass password

AT%E=2

Erase passwords in accounts 0-4

AT%E=3

Erase phone numbers in accounts 0-4

AT%E=4

Disable Account, Dialback, and New Number fields in accounts 0-4.

AT%E=5

Edit or overwrite an individual account or an individual account field

AT%An=

where n is the account number.

See the image in the Setting Up Dial

Security section for more information.

Maintaining Security Accounts

Once the administrative password is set and Dial Security is enabled, the administrator is the on ly one who can access account information.

You can use the AT%S= and AT%E= commands to change and modify account information.

Example: Sending AT%E=3 erases passwords for accounts 0-4.

Note: When using the AT%S= command, the device echoes the administrative password, which is

case-sensitive. Courier 56K Business Modems will accept an invalid password entry, but will lock out users from the security commands. For example, if the password is Green, but you enter GREEN, an OK is displayed. However, if you try to type a security command (for example, ATI10 to view accounts), an [ACCESS DENIED] message is displayed.

Remote Configuration

Dial Security accounts may be configured remotely. (Refer to Configuring Dial Security Remotely at the end of this section .)

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For your modem to

Command

Assign the password as your Autopass password.

AT%V=PWn where n is the number of the account you set up.

For your modem to

Command

Enable Dial Security

ATS53.0=1

What The Guest User Needs To Do

When guest users want to call in to the host (assuming you have enabled Dial Security by entering ATS53.0=1),

 They must know the password.  If you have enabled Dialback, they must set their device to auto -answer.

1. If the host has security enabled, get a password from the host’s administrator. The password is

case-sensitive, so be sure to copy it correctly.

If the host has prompting enabled and the host operator enables Dialback for your account, skip to Step 3.

2. For guest users with Courier Lite 56K Business Modem s (or I-Modems) only:

a) Create a security account using the password the host’s administrator asked you to use. (See

Setting Up Dial Security, earlier in this section for instructions.)

b) You need to assign the password as your Autopass password.

Example: Sending AT%V=PW3 will assign the password as an Autopass password for account 3.

c) Check to see that you set your Autopass password correctly by using the ATI10 command.

Your Autopass password appears beside AUTOPASS PASSWORD if you have done all the steps correctly.

d) Once the Autopass password is set, enable your Courier Lite 56K Business Modem’s Dial Security.

CAUTION: If you do not follow an S-Register setting with &W, the setting will be retained only until the next reset or power off.

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For your modem to

Command

To answer the Dialback call

ATS0=1

For your modem to

Command

Disable Auto Answer

ATS0=0

3. If Dialback is enabled at the host Courier Lite 56K Business Modem ’s site, set your modem to

answer the host Courier Lite 56K Business Modem when it dials back.

4. Call the host.

5. After the call ends you can disable Auto Answer.

Configuring Dial Security Remotely

The host administrator can configure the host’s security settings remotely.

Note: At the host device, you must have previously enabled remote access and assigned a remote access password that allows view-and-change privileges (Refer to the Accessing and Configuring the

Modem Remotely section in this guide). You may want to use your administrative password as your

remote-access password.

Dialing In From the Remote Site

1. From the remote site, connect to the host using Dial Security. Once a connection is made,

follow the instructions for beginning a remote -access session as described in the Accessing and Configuring the Courier Lite 56K Business Modem Remotely.

2. When remote access has been granted, use the AT%S= command to access the Dial Security

accounts. Refer to the Maintaining Security Accounts part in this section .

To view the security account information use ATI10.

3. Make any configuration changes and execute them immediately by entering AT%C2.

4. To end the remote session and reactivate Dial Security on the host, reset the host device by

issuing ATZ.

WARNING: If you do not use the ATZ command to end a remote-access session, Dial Security will remain disabled at the host, and anyone dialing in to the host for remote access will have access to the ATI10 screen and all Dial Security accounts.

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DTMF Security

DTMF (Dual Tone Multi -Frequency) Security requires a modem to go off hook when it receives a call but keep silent until it receives the valid DTMF password. After the modem receives the valid password, it will begin training. If the DTMF password is invalid, the modem will go on hook, and the DTE will never know there had been a cal l coming.

The DTMF security status and password are shown in the ATI10 screen.

DTMF security is enabled by setting the S53 bit 3, e.g. S53=8 or S53.3=1.

Using the %D command sets the DTMF security password (AT%D=PWn, n=0--4). Make sure to disable that account so no one can use the DTMF password as the Dial Security account. For example, to set local modem DTMF security password, you may use following command: AT%A0=123456,N,,, then AT%D=PW0. You can change that security account later, if you like.

The DTMF password can be the combination of 0123456789*ABCD; the # is used as the password end sign. The maximum length of the DTMF password is eight characters.

The remote modem dial string should look like this: ATDT2625000@123456#. In this example, “123456” is the DTMF security password.

Testing the Connection

This section contains information about:

 Testing the Courier Lite 56K Business Modem using AT&Tn

Overview

Your modem can perform local analog loopback and local digital loopback tests. You can use these tests to check the operations of the modem’s transmitter and receiver, or to locate a problem with a remote device or a telephone line.

Testing is done by sending the AT&Tn command or by setting Register S16. Only one test can be performed at a given time. If you send a test command while the modem is in test mode, you will receive an ERROR message.

All loopback testing conforms to ITU-T Recommendation V.54.

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For your modem to

Command

End test

AT&T0

Local analog loopback

AT&T1

Local digital loopback

AT&T3

Local analog loopback with test pattern

AT&T8

Testing the Courier Lite 56K Business Modem using AT&Tn

To perform local analog loopback and local digital loopback testing, use the AT&Tn command. You can type in your own data during testing or use the modem's internal test pattern and error detector. See the following sections for more detailed information about each AT&Tn command.

Example: Sending AT&T3 to your Courier Lite 56K Business Modem will allow a remote user to test their connection to your modem.

Note: Disable error control (using the &M0 command, refer to the Alphabetic Command Summary ) before testing. If the modem is detecting errors and retransmitting the affected data, your results will be invalid.

Analog Loopback Testing

Local loopback testing checks the operation of the Courier Lite 56K Business Modem 's transmitter and receiver.

Using AT&T1

1. Send AT&M0&N3S14.0=0 to prepare the modem for testing.

This command disables error control, fixes the connection rate at 2400 bps, and makes the modem return to command mode when you type +++.

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Specifications and Main Features

Frequently Asked Questions

User Manual