Uni-Com USRobotics Courier Lite 5686G-PRO User manual

USR®Courier® Lite Business Modem
User Guide
USR5686G-PRO
R24.0802.00
Rev 1.0 06/2018

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Copyright © 2018 USR, a Division of UNICOM Global
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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Copyright © 2018 USR, a Division of UNICOM Global
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
3. Line to wall jack
4. Line to telephone
5. DIP switches
6. Serial port
7. Power input
Side
8. Volume dial

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Step One: Prepare for Installation
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 as 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 8are 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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Checking Your Modem’s Software Version
Issuing the ATI7 command produces the following information to appear on your terminal screen.
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
0F
DAA rev
3
Serial Number
xxxxxxxxxxxx
OK
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 respond 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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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
To do this
Set DIP Switch
To this setting
Set DTR to Normal
1
OFF (Default)
Ignore DTR
1
ON
Set verbal result code display
2
OFF (Default)
Set numeric result code display
2
ON
Disable result codes
3
OFF
Enable result codes
3
ON (Default)

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To do this
Set DIP Switch
To this setting
Enable the echo in offline commands
4
OFF (Default)
Disable the echo in offline commands
4
ON
Enable auto answer
5
OFF
Disable auto answer
5
ON (Default)
Normal Carrier Detect
6
OFF (Default)
Carrier Detect always on
6
ON
Load Y0-Y4 configuration that is stored in non-volatile memory
(NVRAM)
7
OFF (Default)
Load the &F0 configuration from read-only memory (ROM)
7
ON
Disable AT commands
8
OFF
Enable AT commands
8
ON (Default)
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:
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.

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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.
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
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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Other Remote-Access Commands
The table below is a list of remote-access configuration commands.
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
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 S-
Register 42, and the pause duration using S-Register 43. Refer to the S-Registers section for
more information.

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

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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%Bncommand.
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
to
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
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.
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

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You can use the AT%Cn command to control whether and when to apply changes to the
configuration.
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
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:
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
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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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:
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 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 Account
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%Ancommand
to set up user accounts.
Note: The AT%Ancommand 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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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.
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,,
Note: To enable Dialback, you must enable Dial Security with Prompting. See step 6.