LandCell CDM819u User manual

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User’s Manual
CDMA Cellular Model CDM819s Serial Modem
CDMA Cellular Model CDM819u USB Modem
For use with LF1.2.04 and LF1.2.06 modules
In Support Of Hardware Revision1.0 and 2.0
Revision 1.8
April 2005

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Table of Contents
1Introduction ...................................................................................................................5
1.1 Modem Capabilities................................................................................................5
1.2 The Types Of Calls.................................................................................................5
1.3 Speeds ...................................................................................................................5
2Getting Started ...............................................................................................................6
2.1 Fast-Track: Circuit Switch Data (CSD) Call Setup....................................................7
2.2 Fast-Track: Packet Data Call Setup..........................................................................9
2.3 Fast-Track: Activating your Modem ......................................................................10
2.4 Fast-Track: Troubleshooting Communications with the Modem ..............................11
2.5 Setting Up Your Modem.......................................................................................12
2.6 Configuring The Modem.......................................................................................12
3Using Terminal Emulation Software To Talk To The Modem..........................................13
3.1 Serial Connection Reference Table ........................................................................13
4Activating The Modem .................................................................................................13
4.1 Over-the-Air Provisioning.....................................................................................14
5Placing Calls ................................................................................................................14
5.1 Making An Async Call Using Terminal Emulation Software ...................................14
5.2 Configuring Dial-Up Networking..........................................................................14
5.3 Making A 1xRTT Packet Data Call........................................................................15
5.4 PC Fax Modem and Setup for Hot Fax...................................................................15
6Troubleshooting...........................................................................................................16
6.1 Helpful Hints........................................................................................................16
6.2 Diagnosing COM Port Problems Using HyperTerminal..........................................17
6.3 Altering The Modem’s Cellular Parameters............................................................18
6.4 Entering Offline Digital Mode...............................................................................18
6.5 Unlocking The Service Programming Code (SPC)..................................................18
6.6 Entering The Mobile Directory Number (MDN).....................................................18
6.7 Entering The MSID/MIN Number .........................................................................18
6.8 Entering The Mobile Country Code (MCC)............................................................18
6.9 Entering The Mobile Network Code (MNC)...........................................................18
7Frequently Asked Questions..........................................................................................19
7.1 Does The Modem Understand AT Commands?......................................................19
7.2 At What Speed Can I Send Data?...........................................................................19
7.3 How Do I Perform An Over-the-Air Activation Of The Unit?..................................19
7.4 The CDM-819s/u Does Not Answer When I Dial From Another Modem. ................19
7.5 The Modem Auto-Answered, But Is Not Connecting. .............................................19
7.6 I Dialed a Phone Number Using ATDT and received "No Carrier"...........................19
7.7 I Dialed A Phone Number Using ATDT And Connected, But When I Physically Move
The Modem, I Receive A "No Carrier" Message.................................................................19
7.8 What Is The AT Command To Change The Baud Rate Of The Modem?..................20
7.9 What Is The AT Command To Check The Current Baud Rate?................................20
7.10 What Is The AT Command To Change The Flow Control?......................................20
7.11 When Do I Need A Null Modem Cable? ................................................................20
7.12 Why Do I Have To Set The Phone Number As #777? .............................................20
7.13 What Is Dormancy?..............................................................................................21
8Land-Cellular Proprietary AT Configuration Commands.................................................21
9Session Management Commands...................................................................................21
9.1 User Profiles ........................................................................................................21
10 AT Command Reference...............................................................................................21

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10.1 The Six Types Of Commands:...............................................................................21
10.2 Command Line Syntax..........................................................................................22
10.3 Result Codes ........................................................................................................22
10.4 Basic AT Parameters ............................................................................................23
10.5 S-Registers...........................................................................................................23
10.6 Basic Action Commands.......................................................................................24
10.7 Extended Commands ............................................................................................24
10.8 Cellular CDMA Commands ..................................................................................25
10.9 Land-Cellular Proprietary AT Command Set..........................................................28
11 Quick Reference Guide.................................................................................................29
12 RS-232 Serial Port Integration Parameters......................................................................32
13 Electrical & RF Specifications.......................................................................................33
13.1 CDM-819s/u Rev 2.0............................................................................................33
13.2 CDM-819s Rev 1.0...............................................................................................34
14 CDM-819s/u Rev 2.0 Mechanical Specifications ............................................................35
14.1 CDM819s Rev 2.0 End Cap Forward Views...........................................................35
14.2 CDM819u Rev 2.0 End Cap Forward Views ..........................................................36
14.3 End Cap Rev 2.0 Overhead & Profile Views ..........................................................37
14.4 Mounting Flange Guide for Rev 2.0.......................................................................37
15 CDM819s Rev 1.0 Mechanical Specifications ................................................................38
15.1 CDM819s Rev 1.0 End Cap Frontal Views.............................................................38
15.2 CDM819s Rev 1.0 End Cap Overhead & Profile Views ..........................................38
15.3 CDM819s Rev 1.0 Mounting Flange Guide............................................................39
16 Limited Warranty .........................................................................................................40
17 Copyright Notice..........................................................................................................40
18 Appendix.....................................................................................................................41
18.1 Carrier Specific Information..................................................................................41
18.1.1 Verizon Wireless..........................................................................................41
18.1.1.1 Over-the-Air Provisioning.........................................................................41
18.1.1.2 United States Verizon Subscriber Settings ..................................................42
18.1.1.3 1xRTT Connections (Username and Password) ..........................................42
18.1.2 Sprint PCS...................................................................................................43
18.1.2.1 IOTA Provisioning...................................................................................43
18.1.2.2 1xRTT Connections (Username and Password) ..........................................43
18.1.3 Bell Mobility (Canada) .................................................................................44
18.1.3.1 Provisioning.............................................................................................44
18.1.3.2 1xRTT Connections (Username and Password) ..........................................44
18.1.4 Western Wireless..........................................................................................45
18.1.4.1 Provisioning.............................................................................................45
18.1.4.2 1xRTT Connections (Username and Password) ..........................................45
18.1.5 Alltel...........................................................................................................46
18.1.5.1 Provisioning.............................................................................................46
18.1.5.2 1xRTT Connections (Username and Password) ..........................................46

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List of Tables
Table 1: User Profile Commands ...........................................................................................21
Table 2: Result Codes Table..................................................................................................22
Table 3: Basic AT Parameters Table ......................................................................................23
Table 4: S-Registers Table ....................................................................................................23
Table 5: Basic Action Commands Table.................................................................................24
Table 6: Extended AT Configuration Commands Table...........................................................25
Table 7: CDMA AT Parameter Commands Table ...................................................................26
Table 8: Cellular AT Command Extensions In Support Of Voice Services Table ......................28
Table 9: Proprietary AT Command Set ..................................................................................28

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1Introduction
Thank you for purchasing the Land-Cellular CDM819s or CDM819u (herein after referred to as
the CDM-819s/u) wireless modem. This guide will assist you in the set up and use of your new
CDM-819s/u modem. Follow the instructions in sections 2, 3 and 4 to install all necessary
software/drivers and set up your computer or data terminal to send and receive information via
the cellular network.
This manual is written for CDM-819s/u modems that have an RF module with a firmware version
of LF1.2.04 and LF1.2.06. The firmware version of the module can be confirmed with the
AT+GMR command. This command works with all firmware versions of the RF module.
1.1 Modem Capabilities
The CDM-819s/u automatically supports dual-band operations in the CDMA 800MHz cellular
and CDMA 1900MHz PCS bands.
The modem has three operational states:
Command State
Online State
Online Command State
When first powered on, the modem is in the Command State where it is able to accept AT
commands. When instructed to dial out or to answer a data call, the phone is in the Online State.
The "Quick Reference Guide",section 11.0 has more information on how to enter these
operational modes
1.2 The Types Of Calls
This chapter describes some of the features and capabilities of the CDM-819s/u modem. Section
2 explains how to set up your modem to place data calls using HyperTerminal and Dial-Up
Networking. Understanding these methods may help you to integrate the module with other
systems as well.
The modem can make three types of calls:
Mobile Circuit Switch Data (Origination and Termination)
Mobile Packet Data (TCP/IP Origination and Termination), TCP and UDP
Voice Channel
1.3 Speeds
Data Rate From The Modem To The Cellular Network
Data rates for Circuit Switch Data calls are up to 14.4 kbps, whereas 1xRTT Packet Data Calls
(TCP/IP) supports data throughput up to 153.6 kbps.
Data Rate From Your Computer To The Modem
The CDM-819s/u modem has a default RS-232 port speed of 115,200 bps. Your COM port must
be configured to operate at this rate in order to properly communicate with the modem. The
modem's COM port speed can be adjusted with the: AT+IPR command. The modem's COM port
speed is variable from 300 bps to 230,400 bps. Warning: Please ensure your COM port is
capable of 230,400 data rates before changing the modem to this speed, or you may not be
able to talk to the modem.

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2Getting Started
The following Fast-Track Sections details how to quickly activate a modem, configure and test a
Circuit Switch Data (CSD) call, and a Packet Data Call (TCP/IP). Additional details if needed are
listed in the sections that follow the Fast-Track Sections. The following modem setup examples
apply for Windows 98, Me, NT, 2000 & XP®. Due to the divergent graphical interfaces of these
different operating systems, there may or may not be an extra step to follow (e.g. an additional
procedure to open a program from the Start Menu). This guide is optimized for Windows XP
Professional.

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2.1 Fast-Track: Circuit Switch Data (CSD) Call Setup
1. Connect the modem to an active COM port on a PC with an RS-232 9 pin straight
through cable.
2. Attach the antenna and power connector.
3. Connect with a Hyper-Terminal session set to 115,200, 8 Bits, No Parity, 1 Stop Bit, and
Hardware Flow Control enabled, the default speed of the modem.
4. If the modem has not been activated, activate the modem. See Section 2.3 and the
Appendix for information specific to your carrier.
5. Change the Baud Rate to your required speed, i.e. 9600. AT+IPR=9600. Disconnect
HyperTerminal, change the baud rate to 9600 and reconnect.
6. Confirm contact with modem using AT+GSN this prints out the ESN of the modem (i.e.
+GSN: 45263AF4). If you get an Error or no communication, go to the section 2.4
Troubleshooting Communications with the Modem.
7. To auto-answer calls set ATS0=1 A value of ATS0=1 sets the modem to answer on the
first ring, where ATS0=0 disables the auto-answer feature. (Note this is a letter S
followed by a Zero)
8. Set the modem to answer/terminate incoming Asynchronous Data Calls; AT$QCVAD=4
9. To set the Carrier Detect (DCD) to follow its connection state to the Cellular Network, set
AT&C1. The yellow LED will turn on when connected to the Carrier, and turn off when not
connected. A value of AT&C0 sets CD to always be on, and a value of AT&C2 sets CD
to be always on, but to wink when there is a change in the connection state.
10. Ensure that DTR is set to return to modem to command state on an ON-to-OFF transition
of DTR with AT&D2 A value of AT&D0 ignores DTR, a value of AT&D1 enters
online command state upon an ON-to-OFF transition of DTR.
11. Save the new settings in Profile 1 with AT&W1 and then set Profile 1 as the Default
profile with AT&Y1
12. To confirm your settings, do an AT&V. This will print out about 7 lines of text with all the
register values.
13. Verify that you have good signal strength, AT+CSQ?. A typical reply is +CSQ? 19,99.The
signal strength ranges from 0 to 31, the higher the number the better the signal.
14. Set the modem for verbose result codes, with ATV1, this displays result codes as Words,
ATV0 displays result codes as digits.
15. Confirm and that you are registered on the cellular network. AT+CSS? A reply of +CSS?
2,Z,99999 indicates that you are not registered. It may take up to 15 seconds or so after
power-up to register on the network. Once registered a typical response will be +CSS?:
1,A,4152 where 1 is the band class, 1=800 MHz, 2=1900 MHz, A-F is the band (Z
indicates not registered on network), 4152 is the SID, i.e. the cell tower ID, (99999
indicates not registered on network).
16. Test CSD Origination by calling your cell phone with ATDT5551234567 (replace
5551234567 with your cell phone number). Once the phone rings and you answer the
phone, you should hear sounds like a fax negotiation.
17. Test CSD Termination by calling the phone number of your modem. Once it answers
you should hear sounds like a fax negotiation. Hang up.

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18. To further test CSD termination connect another modem, (landline or cellular) to another
available COM port on a PC. Configure that modem and the COM port to your required
speed, i.e. 9600, with AT+IPR=9600.
19. Start HyperTerminal on that PC’s COM port and call the Land-Cell modem from this
terminal window with the following command. ATDT<Phone number of 819 Modem>.
20. The terminal window connected to the 819 modem, will say “RING” and then once the
modems have negotiated a connection, it will say “CONNECT”.
21. You can now type in text in either terminal window and it will appear in the other terminal
window. This means that your modem is now answering incoming CSD data calls.
22. Type in ATH0 to disconnect the call.
23. Once you can originate and terminate CSD calls with the modem you are ready to
connect the modem to your equipment. Please ensure that your equipment is configured
to your required data rate, i.e. 9600 bps.
24. By default the Modem is configured for full hardware flow control. This uses the control
signals, CTS and DTS, DSR and DTR, Carrier Detect, and Ring Indicator. The pin-out of
the modem is in Section 12.
25. If you are using a 3 wire interface cable with RX, TX and Ground or your equipment is
configured for no hardware flow control, you will need to disable Hardware flow control
with AT+IFC=0,0 and save it in your profile with AT&W1.
26. If your equipment cannot disable hardware flow control, you can spoof the signals by
shorting pins 1,4 and 6 together, and also pins 7 and 8 on the DE-9 connectors of your
three-wire cable.

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2.2 Fast-Track: Packet Data Call Setup
1. Create a 19,200 Generic Modem and configure it for 115,200, 8 bits, no parity, 1 stop bit.
Attach the modem to an active COM port on the PC, i.e. COM1.
2. Configure the selected COM port to a maximum speed of 115,200 in the Hardware
device manager.
3. Attach the antenna and power to the CDM-819 modem.
4. Connect it to the COM port with a 9 pin RS-232 straight through serial cable.
5. If the modem has not been activated, activate the modem. See Section 2.3 and the
Appendix for information specific to your carrier.
6. Use HyperTerminal on the COM port to set the Carrier Detect (DCD) to follow its
connection state to the Cellular Network, set AT&C1. The yellow LED will turn on when
connected to the Carrier, and turn off when not connected. A value of AT&C0 sets CD to
always be on, and a value of AT&C2 sets CD to be always on, but to wink when there is
a change in the connection state.
7. Ensure that DTR is set to return to modem to command state on an ON-to-OFF transition
of DTR with AT&D2 A value of AT&D0 ignores DTR, a value of AT&D1 enters
online command state upon an ON-to-OFF transition of DTR.
8. Save the new settings in Profile 1 with AT&W1 and then set Profile 1 as the Default
profile with AT&Y1
9. To confirm your settings, do an AT&V. This will print out about 7 lines of text with all the
register values.
10. Confirm and that you are registered on the cellular network. AT+CSS? A reply of +CSS?
2,Z,99999 indicates that you are not registered. It may take up to 15 seconds or so after
power-up to register on the network. Once registered a typical response will be +CSS?:
1,A,4152 where 1 is the band class, 1=800 MHz, 2=1900 MHz, A-F is the band (Z
indicates not registered on network), 4152 is the SID, i.e. the cell tower ID, (99999
indicates not registered on network).
11. Create a Dial-Up Networking (DUN) connection using the modem that you created with
the active COM port, i.e. COM1 in Network and Dial-up Connections. Configure it to
115,200 bps and set Security to Typical.
12. Start a DUN session by double clicking on the DUN icon that was created.
13. Set the username and password as defined in the Appendix for your carrier.
14. Enter the phone number as #777 with no area code and click on Dial.
15. The modem will dial out and attempt to connect.
16. If the configured baud rate for the modem, the COM port, the modem and the DUN do
not match, the DUN will not be able to talk to the modem properly and you will get a
hardware error message. Otherwise the DUN will contact the cellular network and
authenticate the user on the network.
17. Once connected you will be able to browse the Internet through the DUN session. To
confirm this, disable any other network connection you may have running.

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2.3 Fast-Track: Activating your Modem
1. Connect the modem to an active COM port on a PC with an RS-232 9 pin straight
through cable.
2. Attach the antenna and power connector.
3. Connect with a Hyper-Terminal session set to 115,200, 8 Bits, No Parity, 1 Stop Bit, and
Hardware Flow Control enabled.
4. Confirm contact with the modem with AT+GSN this prints out the ESN of the modem i.e.
(+GSN: 45262036). If you get an Error or no communication, go to the section on
Communicating with the Modem.
5. Verify that you have good signal strength, AT+CSQ?. A typical reply is +CSQ? 19,99.The
signal strength ranges from 0 to 31, the higher the number the better the signal.
6. Confirm and that you are registered on the cellular network. AT+CSS? A reply of +CSS?
2,Z,99999 indicates that you are not registered. It may take up to 15 seconds or so after
power-up to register on the network. Once registered a typical response will be +CSS?:
1,A,4152 where 1 is the band class, 1=800 MHz, 2=1900 MHz, A-F is the band (Z
indicates not registered on network), 4152 is the SID, i.e. the cell tower ID, (99999
indicates not registered on network).
7. Perform the activation instructions specific to your carrier as indicated in the Appendix.
I.E. For Verizon, OTASP can be initiated with an AT command, AT+CDV*22899. Wait 4
minutes and then test that it worked.
8. Confirm that the modem is activated, by performing a voice call to your cell phone,
AT+CDV<Cell Phone Number> (Use no spaces or angle brackets). Your cell phone
should ring and display the phone number of the modem.

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2.4 Fast-Track: Troubleshooting Communications with the Modem
1. Connect the modem to an active COM port on a PC with an RS-232 9 pin straight
through cable. Ensure the Cable is firmly connected.
2. Attach the antenna and power connector. Ensure that the power LED lights up. If it
doesn’t, confirm that the power cube is properly working and putting out 12 VDC at 1.5
Amps. The power input range for the modem is 8 to 30 VDC with 1.5 Amps.
3. The default speed of the Modem is 115,200. Connect with a Hyper-Terminal session set
to 115,200, 8 Bits, No Parity, 1 Stop Bit, and Hardware Flow Control enabled.
4. Type in AT. You should get back an OK. If you get garbled characters, the speed of the
modem may be set to a different speed. You will need to disconnect HyperTerminal,
change the baud rate to the next lower speed and then reconnect. Enter the AT
command again. Keep trying lower and lower speeds until you get back an OK.
5. Confirm that you are talking to the modem and not some other device by entering in a
Modem Specific command, i.e. AT+GSN this will print out the ESN (+GSN: 45262036) of
the modem in hex format, which should match the ESN on the label.
6. If you get an error, or no communication, confirm that Hyper-Terminal is connected to the
proper COM port. Typically this is COM1. Internal modems can show up as COM3.
7. If there is still no communication, confirm that the COM port is not locked. Go to the
hardware device manager in the control panel under systems.
8. Also, check to see if you have an infrared (IR) port assigned to your modem's COM port.
Disable it if you are not using this function. Often, an IR port can interfere with the COM
port even after you successfully connect. Device Manager may indicate that there is no
conflict between the two, but disabling the IR port may still help.
9. If your system's COM port appears to be locked, you can also try disabling and enabling
the COM port in the Hardware Device manager. You may have to shut down and reboot
your system. It will also indicate what the COM port number is.
10. Make certain that you are using the proper RS-232 serial cable. For most applications,
you must use a straight through RS-232 serial cable. For certain types of equipment, you
may be required to use a null modem cable. For more information on this, refer to the
FAQ section titled "When Do I Need A Null Modem Cable?"

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2.5 Setting Up Your Modem
NOTE: If you are setting up a CDM819u modem, first follow the "CDM-819s/u Driver
Installation" guide available from the Land-Cellular website as you will need to download the
drivers. After the CDM819u is installed, it will appear as a new COM port in your system. You
can view what COM port the modem installed on from Device Manager. To view the Device
Manager, right-click the "My Computer" icon on the desktop and select "Properties". Click the
"Hardware" tab and then click the button for "Device Manager".
To install the a modem for the CDM819s, follow the instructions below:
From the Start Menu, click Settings --> Control Panel.
Inside Control Panel, double-click the "Phone and Modem Options" icon.
Click the "Modems" tab at the top of the box
Click the "Add" button.
Select "Don't Detect My Modem" and click Next.
You may download all necessary USB and modem driver files from our website at
http://www.land-cellular.com/support/drivers_utilities.htm. If you are installing the modem
using the drivers from the website, refer to the steps listed in the "CDM-819s/u Driver
Installation" guide posted on the web page listed above. To proceed using native Windows
drivers, follow the steps below:
Select "Standard 19200 bps Modem" and click Next.
Assign the modem to the COM port where it is or will be connected, then click Next.
Click Finish.
2.6 Configuring The Modem
Click on Start --> Settings --> Control Panel.
Click "Phone and Modem Options". Click New.
For "Location Name", enter a name to distinguish this connection as the CDM-819s/u.
Type your area code in the Area Code box.
Click "Apply" and OK.
The window should exit out to the "Phone and Modem Options" box.
Click the tab at the top titled "Modems".
Select the "Standard 19200 bps Modem" (or the "Kyocera High-Speed Modem" if you
installed using the driver from the website) and click "Properties".
Click the "Modem" tab at the top of this new box.
The box titled "Maximum Port Speed" should read: 115200. If not, scroll down to select
115200.
Click OK. Click "Apply" and then OK.

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3Using Terminal Emulation Software To Talk To The Modem
You can access the modem through a terminal emulation program such as HyperTerminal, which
should already be installed in your version of Windows. To launch HyperTerminal, click on the
Start Menu, go to Programs --> Accessories --> Communications --> HyperTerminal. If
prompted, you may name this connection "TEST" or give it any other appropriate name. After
clicking OK, the "Connect To" box will appear. In the "Connect Using" box, you may see several
listings such as COM1, COM2 and the Standard 19200bps Modem that we just added in the
previous section. Do not attempt to connect to the device via the 19200 bps modem or the
Kyocera High-Speed Modem option. Instead, select COM1 (or whatever port you have the
modem connected to) from the drop-down list. After clicking OK, you should be prompted with a
"Port Settings" dialog box. Make certain that the "Bits per Second" option is set to "115200". The
"Data bits" should be listed as "8", Parity "None", Stop Bits "1" and Flow Control "Hardware".
Click "Apply" and "OK". By default, the CDM-819s/u Flow Control protocol is Hardware, but
this can be adjusted with the AT+IFC command. Please see the sections entitled "Frequently
Asked Questions" and "Extended AT Configurations Command Table" for more detailed
information pertaining to this and other communications commands.
3.1 Serial Connection Reference Table
Below is a quick reference of the default communication parameters of the CDM-819s/u:
Bits Per Second: 115200
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control: Hardware
The HyperTerminal connection should now be active. As a test, we'll send the standard attention
code to the modem. Type the command: AT and press enter. If properly interfaced with the
modem, you should receive an OK reply. If not, make certain that the modem's power LED is
illuminated and the bit rate of your terminal emulation software is set to 115200. For most
applications, you should be using a standard RS-232 straight cable. To check if you need a Null
Modem cable, view the "When Do I Need A Null Modem Cable?" section 7.11 in the FAQ. For
further assistance, refer to the "Troubleshooting" section 6.0 of this manual.
4Activating The Modem
After issuing “AT” commands to verify communication with the modem, you are ready to initiate
the cellular connection with the cell tower. Before the modem is able to place or receive calls,
you must subscribe to a cellular provider. When subscribing to their service, you will be asked for
the Electronic Serial Number (ESN) of the unit. This number is printed on the data label affixed
to the modem. The number is available either in decimal or hexadecimal format. You may also
query the ESN directly from the modem by opening your terminal emulation software and issuing
the following command: AT+GSN This command will return the ESN in hexadecimal format.
+GSN: 45263A2F. Once your account has been activated, you have to provision the modem for
operations. Each Cellular Carrier supports different methods for activating a modem, some
require that you manually program the assigned number into the modem and some support Over-
the-Air Service Provisioning (OTASP). OTASP configures the modem for operation with their
cellular network. The process is described below; please see the Appendix for information
specific to your Carrier on how to activate your modem.

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4.1 Over-the-Air Provisioning
The CDM-819s/u supports the cellular service provisioning features called Over-the-Air Service
Provisioning (OTASP) and Over-the-Air Parameter Administration (OTAPA). OTASP occurs
when a user initiates a call to the service provider. No further commands are required to provision
the modem. For example, a user who gets a new modem/phone without any service programming
data can call the service provider's special OTASP number to have the device programmed
without physically taking it to the service provider.
OTAPA occurs when the network initiates a call to the modem and programs it without any user
intervention. OTAPA is typically used when the service provider decides to update information
on many cellular devices at the same time.
After the modem’s serial number is authorized for use with a cellular provider, you may activate
the modem over the cellular network if your carrier supports it. Please see the Appendix for
information specific to your Carrier.
After issuing the OTASP command, your cellular provider will program the proper roaming
parameters into the modem. Please allow approximately four minutes for this to occur. After
waiting the appropriate amount of time for the cellular network to program the modem, perform a
power cycle by removing the DC power supply plug and reconnecting it. To test that OTASP has
taken place, type: AT+CDV<phone number to call> from your terminal emulation software.
If this is successful, the modem will place an outbound call through the cellular network to the
phone number specified. The phone will ring and call display will show the phone number of
your modem.
5Placing Calls
Use the procedures below to place outbound circuit-switched and packet data calls to other
telephony devices.
5.1 Making An Async Call Using Terminal Emulation Software
Configure your terminal emulation program as explained in the "Using Terminal Emulation
Software To Talk To The Modem" section 3.0 above. See Section 2.1 on the setup details to make
a CSD call.
5.2 Configuring Dial-Up Networking
Creating A New Dial-Up Networking (DUN) Connection:
Click on Start --> Settings --> Control Panel.
Double-click "Network Connections".
Click "Create A New Connection".
Click Next.
Select "Connect To The Internet" and click Next.
Select "Set Up My Connection Manually" and click Next.
Select "Connect Using Dial-Up Modem" and click Next.
For the ISP Name, you may enter anything you like and click Next.
For the "Phone Number" box, enter: #777 and click Next.
The username and password information should be left blank.
Check the box that says you want a shortcut to this on the desktop and click Next.
Click Finish.
Close Control Panel if it is still open.

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Configuring The New DUN Connection:
NOTE: Only follow steps 1–9 if you installed using the native Windows driver. The driver
from the Land-Cellular website configures these parameters automatically.
1. The new connection should open automatically. If it does not, double-click the icon
on the desktop that you just created.
2. Click "Properties".
3. From the "General" tab, click "Configure". Make certain that the maximum speed
(bps) of this connection is set as 115200.
4. Make certain that the "Enable Hardware Flow Control" option is checked.
5. Uncheck "Enable Modem Error Control" and "Enable Modem Compression".
6. Click OK.
7. From the "Options" tab, make sure these are checked: "Display Progress While
Connecting" and "Prompt For Name And Password, Certificate, etc".
8. From the "Security" tab, make certain that "Typical" is selected.
9. From the "Networking" tab, verify that "Internet Protocol TCP/IP" is checked. Other
items may or may not be checked, but TCP/IP must be enabled.
10. Click OK to return to the Connect box.
Note-For USB versions of the modem, if your USB com-port supports higher data rates, you can
configure the CDM-819u modem to 234,000 and then set the COM port and Kyocera High Speed
Modem Driver to 230,400 as well to take advantage of these higher data rates. Warning: Please
ensure your COM port is capable of 230,400 data rates before changing the modem to this
speed.
From this DUN connect box, you can set the modem for async data calls by changing the "#777"
phone number to the number you want to call. For 1xRTT packet data calls, the phone number
must be #777. By default, the modem is set for async calls.
5.3 Making A 1xRTT Packet Data Call
•Open Dial-Up Networking or create a new connection as described in the steps above.
•Leave the area code blank and make certain #777 is set as the telephone number.
•Click "Dial" to attempt the connection. See the Appendix for username and password
formats specific to your carrier.
5.4 PC Fax Modem and Setup for Hot Fax
This section details on how to configure a modem for PC Faxing with Hot Fax.
Modem Setup
In the Windows Modems properties advance tab set the following
AT+FCLASS=2.0
Using HyperTerminal connect to the Land-Cell modem and enter the following AT commands.
AT$QCSO=0
AT+CMUX=2
AT+IPR=19200
Disconnect HyperTerminal, change the BAUD rate to 19,200 and reconnect. Then save the
profile settings in Profile 1.
AT&W1
AT&Y1

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Confirm that the Windows 19200 Standard Modem definition is also set to 19200.
Hot Fax Setup Tips
The modem detection first sends the init string specified in the HARDWARE.INI file located in
the HotFax or HotFax MessageCenter directory by the "DataInit" line. If the modem does not
respond OK within 2 seconds, the generic string "&F&C1&D2E1V1" is tried. The modem is
given another 2 seconds to respond OK. If it doesn't, then we assume there is no modem on the
specified port and auto-detection is aborted.
If the modem gets past this point, we then put it into "non-echo/verbose" mode by sending
"E0V1". If the modem doesn't respond OK to this command within 2 seconds, we drop DTR for
1.5 seconds then try the same command again. If the modem still doesn't respond OK, we again
assume there is no modem on the specified port and auto-detection is aborted.
Try the following to troubleshoot this problem:
•Verify the "CommandPrefix" entry in the HARDWARE.INI file is set to "AT".
•Verify the "DataInit" entry in the HARDWARE.INI file is set to something plausible.
"AT&F&C1&D1E1V1" is a safe init string.
•Verify the modem responds OK to the "DataInit" by typing it in a Terminal application
such as HyperTerminal.
•Verify the modem responds OK to "ATE0V1" by typing it in a Terminal application.
6Troubleshooting
In this section, you will find important information relating to the setup and diagnosis of your
CDM-819s/u modem. If you are having trouble communicating with the modem, please read this
"Troubleshooting" section and the "Frequently Asked Questions" section 7.0 in full. If, after
reviewing these sections, you are still having problems connecting, call our Technical Support
line at: 954-430-5811 for more assistance. Toll charges may apply.
6.1 Helpful Hints
Only assign one device to any given COM port on your system.
The Land-Cellular CDM-819s/u data modem has a default COM port speed of 115,200 bps. This
is the data rate at which your modem connects to your computer. The modem's COM port speed
can be lowered to 300bps or raised to 115,200 bps (or 230,400 bps for the CDM819u). Warning:
Please ensure your COM port is capable of 230,400 data rates before changing the modem
to this speed. As this setting adjusts the communications speed that the modem utilizes to speak
to the computer, altering this parameter must be performed in a very specific way. Otherwise, you
may lose communication with the modem. To alter the default speed of 115,200 bps, first,
connect via your terminal emulation software (settings: 115200bps, 8, N, 1, Hardware). Now, you
may issue the AT+IPR command to query or change the default speed. After adjusting the port
speed, disconnect from the modem and reconnect using the new data rate. Refer to the
"Frequently Asked Questions" section 7.0 and "Extended AT Configurations Command Table" in
section 10.7 for more information pertaining to the AT+IPR command.
Make certain the serial cable is firmly connected to an enabled COM port with no hardware
resource conflicts. Make sure that you have properly added the "Standard 19200 bps Modem" (or
the "Kyocera High-Speed Modem") to your system using the "Setting Up Your Modem" section
2.5 above. Also, check to see if you have an infrared (IR) port assigned to your modem's COM

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port. Disable it if you are not using this function. Often, an IR port can interfere with the COM
port even after you successfully connect. Device Manager may indicate that there is no conflict
between the two, but disabling the IR port may still help.
If your system's COM port appears to be locked, you may have to shut down and reboot your
system.
Do not use "Disable Call Waiting" (commonly referred to as *70) when configuring Dialing
Properties.
Make certain that you are using the proper RS-232 serial cable. For most applications, you must
use a straight-through RS-232 serial cable. For certain types of equipment, you may be required
to use a null modem cable. For more information on this, refer to the FAQ section 7.11 "When Do
I Need A Null Modem Cable?".
6.2 Diagnosing COM Port Problems Using HyperTerminal
If you are experiencing problems connecting to the cellular network, you can verify if the issue is
between the computer and the modem or between the modem and the cellular network. To test,
open your terminal emulation software as described in the "Using Terminal Emulation Software
To Talk To The Modem" section 3.0 above. Once the modem is ready to accept commands, type:
AT+GSN and press enter. The ESN of the modem should print out on the screen in the following
format “+GSN: 45262036”. This will confirm that you are communicating with the Land-
Cellular modem and not some other device connected to or inside the PC. If the ESN does not
print out, please confirm that you have selected the COM port that the modem is attached to, and
not some other port, internal modems typically show up as COM3.
To test the link between your modem and the cellular network try to call your cell phone. Type
in: AT+CDV<phone number to call> (with no spaces and no angle brackets) and press enter.
This command will perform a voice call similar to the type a standard home phone would make
and if your modem has been activated correctly your cell phone should ring and display the
number of the modem. Answer the incoming call on your cell phone and then hang-up your cell
phone. If you are properly communicating with the modem using the steps above and still cannot
connect through the cellular network, here are a few items to check:
•Call the phone number of the modem. If the phone number is not active, the cellular
service will inform you of this.
•Confirm that the ESN on the Label matches the ESN in the module with AT+GSN This
will print out the ESN of the Modem in Hex format, +GSN: 45263F2A. This rarely
happens, but if the numbers do not match, the wrong ESN may be in your Account.
•Contact your cellular provider and make certain that the Electronic Serial Number (ESN)
of the modem is active in their system.
•Check the signal strength reaching the modem using the following command: AT+CSQ?
A typical reply is +CSQ? 19,99.The signal strength ranges from 0 to 31, the higher the
number the better the signal. See also the FAQ for more information on "No Carrier"
issues.
•Issue the command: AT+CSS? to verify that the modem is registered onto a cell tower. If
the return from the modem is: 2,Z,99999 then the modem is not registered. It may take up
to 15 seconds or so after power-up to register on the network. Once registered a typical
response will be +CSS?: 1,A,4152 where 1 is the band class, 1=800 MHz, 2=1900 MHz,
A-F is the band (Z indicates not registered on network), 4152 is the SID, i.e. the cell
tower ID, (99999 indicates not registered on network).

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•Attempt to relocate the modem and/or antenna to receive a stronger signal.
•Make certain that the modem has been provisioned by the cellular network. To provision
the modem please see the Appendix for activation instructions for your carrier.
NOTE: Running diagnostics from Modem Properties may not work if the computer attempts to
communicate with the modem at an improper baud rate.
6.3 Altering The Modem’s Cellular Parameters
If you have subscribed to a cellular provider using the serial number printed on the case of the
modem, and have confirmed that the ESN matches with an AT+GSN command, but still cannot
provision the unit, you may need to program the Mobile Directory Number (MDN), the IMSI
number (if different than the MDN), Mobile Country Code (MCC) and/or the Mobile Network
Code (MNC). Only change the MCC and MNC if you are SURE that you need to. The next six
sub-sections explain how to change these parameters.
6.4 Entering Offline Digital Mode
In order to change the MDN, MSID, MCC or the MNC, you must first change the operational
mode to Offline Digital by typing: AT$KWMODE=1
After changing this or any other parameter, you may query the modem, by typing a "?" in place
of the "=". For example, to confirm that you are in the Offline Digital operational mode, you
would type: AT$KWMODE?
6.5 Unlocking The Service Programming Code (SPC)
As a safety precaution, to keep unauthorized users from gaining access to the device, the modem
carries a Service Programming Code (SPC). The default SPC is 000000. Without entering this
code, you cannot alter the modem's configuration. To unlock the modem and allow write access,
enter the SPC with this command: AT$KWSPC=000000
6.6 Entering The Mobile Directory Number (MDN)
The MDN is the phone number that is used to call the modem from other devices. You may now
enter the MDN given to you by your CDMA provider by typing: AT$KWDIR=<number
provided by CDMA provider>
6.7 Entering The MSID/MIN Number
The MSID/MIN is the last 10 digits of the IMSI_M internal number assigned by the carrier for
network routing. You may now enter the MSID given to you by your CDMA provider by typing:
AT$KWMSID=<number provided by CDMA provider>
6.8 Entering The Mobile Country Code (MCC)
It is only necessary to enter the Mobile Country Code (MCC) and Mobile Network Code (MNC)
if the modem is not already programmed for operation in your area. If required, these codes are
available from your CDMA provider. To change the MCC type: AT$KWMCC=<3 digit MCC>
6.9 Entering The Mobile Network Code (MNC)
To alter the MNC, type: AT$KWMNC=<2 digit MNC>
After configuring your modem, you must issue the command: AT$KWMODE=2
This resets the modem (takes 10 seconds to reset) and writes your configuration changes to non-
volatile memory. Your modem is now programmed for operation in the area. These configuration

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changes will remain even if the modem loses power. Now that the modem is properly configured,
you may attempt activate the modem as described in section 4.0 and the Appendix.
7Frequently Asked Questions
Below are some of the most Frequently Asked Questions. The answers contained herein may
address many of the questions you could have about our product.
7.1 Does The Modem Understand AT Commands?
Yes. For information on AT commands, see the "AT Command Reference" section 10.0.
7.2 At What Speed Can I Send Data?
Data rates for Circuit Switch Data calls are up to 14.4 kbps, whereas 1xRTT Packet Data Calls
(TCP/IP) supports rates up to 153.6 kbps.
7.3 How Do I Perform An Over-the-Air Activation Of The Unit?
Access the modem via a terminal emulation package such as a PC running HyperTerminal©.
Once connected to the modem, please use the instructions for OTAPA in the Appendix that are
specific to your carrier.
7.4 The CDM-819s/u Does Not Answer When I Dial From Another Modem.
The CDM-819s/u can be configured to automatically answer incoming calls, but by default is set
not to do so. To set up the modem for auto-answer, issue the command: ATS0=1
7.5 The Modem Auto-Answered, But Is Not Connecting.
The modem is not set up on initialization for permanent termination on asynchronous calls. Enter
the following command to check this: AT$QCVAD? The value returned should be 4. If not,
enter the following command: AT$QCVAD=4
7.6 I Dialed a Phone Number Using ATDT and received "No Carrier".
Verify that your CDMA provider has an IWF device installed on their network. If so, check if the
account settings for the modem number are provisioned to activate the IWF for circuit switched
data. The modem may not have the correct Preferred Roaming List (PRL) loaded. Performing
Over-the-Air Service Provisioning (OTASP) should automatically load the correct PRL into the
modem. For information on how to initiate the OTASP, please refer to the "How Do I Perform An
Over-the-Air Activation Of The Unit?" section 7.3 of the FAQ above.
Verify with your CDMA carrier if the phone number of the modem is activated in their network.
You can dial the phone number of the modem from a voice line. If the modem's phone number is
not activated, the cellular provider should reply with a message informing you of this.
7.7 I Dialed A Phone Number Using ATDT And Connected, But When
I Physically Move The Modem, I Receive A "No Carrier" Message.
The modem's immediate location may have strong Electromagnetic Interference (EMI). Verify
the signal strength by issuing the command: AT+CSQ? The signal strength is displayed as
+CSQ:XX,YY. Where the XX is the signal strength and the YY indicates the error rate, a value
of 99 is indeterminate. The signal strength varies from 0 to a maximum of 31.
Confirm and that you are registered on the cellular network. AT+CSS? A reply of +CSS?
2,Z,99999 indicates that you are not registered. It may take up to 15 seconds or so after power-up
to register on the network. Once registered a typical response will be +CSS?: 1,A,4152 where 1
is the band class, 1=800 MHz, 2=1900 MHz, A-F is the band (Z indicates not registered on

20
network), 4152 is the SID, i.e. the cell tower ID, (99999 indicates not registered on network).
If the modem came with a wired antenna, try moving the antenna from place to place to find the
location that gives the best signal quality. After relocating the antenna, issue the: ATDT<phone
number to call> command to check for a connection.
7.8 What Is The AT Command To Change The Baud Rate Of The
Modem?
AT+IPR=<baud rate>
Valid data rates are:
300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200 bps.
Additional valid data rates for USB devices only, such as the CDM819u:
230400 bps
For example, AT+IPR=115200
WARNING: Only change to 230,400 if you have a serial COM port that supports that speed.
NOTE: The baud rate argument is saved into a profile with the AT&Wncommand. For
more information on Profiles, see section "9.0 User Profiles".
7.9 What Is The AT Command To Check The Current Baud Rate?
AT+IPR?
7.10 What Is The AT Command To Change The Flow Control?
AT+IFC=<DCE_by_DTE>,<DTE_by_DCE>
Where: <DCE_by_DTE> Specifies the method to be used by the DTE to control the flow
of received data from the DCE.
<DTE_by_DCE> Specifies the method to be used by the DCE to control the flow
of transmitted data from the DTE.
By default the modem is set up as AT+IFC=2,2 to allow hardware flow control in both
directions. The valid numeric variables for the +IFC command are as follows:
0: No Flow Control
1: Xon/Xoff
2: Hardware
7.11 When Do I Need A Null Modem Cable?
The Land-Cellular modem's RS-232 serial port is wired to act as the Data Communication
Equipment (DCE), while a typical home computer or laptop system is designated as the Data
Terminal Equipment (DTE.) As long as you are connecting two different devices (DCE-to-DTE),
you must use a straight-through serial cable. However, if you are connecting two like devices
(DTE-to-DTE or DCE-to-DCE), it is necessary to use a Null Modem Cable. Use the Null Modem
cable to attach the modem to PDAs and handheld computers. Desktop and notebook computers
require a straight through cable.
7.12 Why Do I Have To Set The Phone Number As #777?
The act of dialing #777 automatically triggers the Cellullar Network to connect the call as a
Packet Data TCP/IP call on the 1xRTT network. To enable automatic packet call connections use
the command: AT$QCPKND=0 To disable this feature, issue: AT$QCPKND=1