Land-Cellular Corp. CDM819i User manual

User’s Manual
CDMA Cellular –Model CDM819i Intelligent Serial Modem
CDMA Cellular –Model CDM820i Intelligent Ethernet Modem
Items denoted with a † must be prefaced with the
AT+LCPAST=1 command before execution.
Revision 2.91
June 2004
Land-Cellular Corp.
12068 Miramar Parkway
Miramar, FL 33025
1-954-430-5811
www.land-cellular.com

Contents
Introduction .................................................................................................................................1.0
Overview................................................................................................................................1.1
Modem Capabilities ................................................................................................................1.2
Operating States......................................................................................................................1.3
The Types Of Data Calls .........................................................................................................1.4
Speeds....................................................................................................................................1.5
Status Indicators......................................................................................................................1.6
Modem Setup Guide .....................................................................................................................2.0
Getting Started........................................................................................................................2.1
Using Terminal Emulation Software To Talk To The Modem..........................................................3.0
Serial Connection Reference Table...........................................................................................3.1
Activating The Modem.................................................................................................................4.0
Over-the-Air Provisioning .......................................................................................................4.1
Troubleshooting ...........................................................................................................................5.0
Helpful Hints..........................................................................................................................5.1
Diagnosing COM Port Problems Using Hyperterminal..............................................................5.2
Altering The Modem’s Cellular Parameters..............................................................................5.3
Entering Offline Digital Mode .................................................................................................5.4
Unlocking The Service Programming Code (SPC)....................................................................5.5
Entering The Mobile Identification Number (MIN)...................................................................5.6
Entering The Mobile Country Code (MCC)..............................................................................5.7
Entering The Mobile Network Code (MNC).............................................................................5.8
v.250 Configuration Commands ....................................................................................................6.0
I Identification........................................................................................................................6.1
Z Soft Reset And Restore Saved Settings..................................................................................6.2
E Command Echo ...................................................................................................................6.3
Q Quiet Mode.........................................................................................................................6.4
V Result Code Form................................................................................................................6.5
H Hang Up.............................................................................................................................6.6
O Return To Online State ........................................................................................................6.7
+++ Enter Online Command State............................................................................................6.8
&F Restore Factory Defaults....................................................................................................6.9
&W Save Configuration To Von-Volatile Memory ..................................................................6.10
&DDTRConfiguration .........................................................................................................6.11
&R RTS Configuration..........................................................................................................6.12
&S DSR Configuration..........................................................................................................6.13
&Q CTS Configuration..........................................................................................................6.14
&C DCDConfiguration .........................................................................................................6.15
&N RI Configuration.............................................................................................................6.16
AT+LCCROK Send OK Response To <CR>..........................................................................6.17
AT+LCNOLF Disable Sending <LF> In Response Messages...................................................6.18
AT+LCNOER Disable ERROR Response To Unknown Commands .........................................6.19
AT+LCPAST Pass Unknown v.250 Commands To The Cellular Module ..................................6.20
Session Management Commands...................................................................................................7.0
AT+LCPRFL Profile Configuration.........................................................................................7.1

ATDn Connection String.........................................................................................................7.2
AT+LCGASC Enable 1xRTT Auto-Session Connect................................................................7.3
AT+LCGRST End Cellular Session.........................................................................................7.4
RS-232 PAD Configuration Commands .........................................................................................8.0
AT+LCICTO Inter-Character Timer.........................................................................................8.1
AT+LCIDCT Idle Disconnect Timer........................................................................................8.2
AT+LCSEST Session Disconnect Timer ..................................................................................8.3
Ethernet Commands......................................................................................................................9.0
AT+LCETHI Set The Local Ethernet IP ...................................................................................9.1
AT+LCETHN Set The Local Ethernet Netmask........................................................................9.2
AT+LCETHG Set The TCP/IP Gateway...................................................................................9.3
AT+LCETHR Print The Route Table .......................................................................................9.4
AT+LCPROX Define A New Proxy.........................................................................................9.5
Miscellaneous, System And Diagnostic Commands .......................................................................10.0
AT+LCCOPT Configuration Options......................................................................................10.1
AT+LCSHWT Show Running Threads....................................................................................10.2
AT+LCSHWM Show Free Memory........................................................................................10.3
AT+LCPRT Periodic Reset Timer...........................................................................................10.4
Frequently Asked Questions (FAQ)..............................................................................................11.0
Does The Modem Understand AT Commands?........................................................................11.1
At What Speed Can I Send Data? ............................................................................................11.2
How Do I Perform An Over-the-Air Activation Of The Unit? ...................................................11.3
What Is The AT Command To Change The Baud Rate Of The Modem?....................................11.4
What Is The AT Command To Check The Baud Rate?.............................................................11.5
What Is The AT Command To Change The Flow Control? .......................................................11.6
When Do I Need A Null Modem Cable?..................................................................................11.7
Do I Need A Crossover Or Patch Ethernet Cable? ....................................................................11.8
What Is Dormancy?................................................................................................................11.9
Can I Change The Phone Number Of The Modem?................................................................11.10
Does The Modem Require Any Special Drivers?....................................................................11.11
Is There A Graphical User Interface (GUI) For The Modem?..................................................11.12
AT Command Reference..............................................................................................................12.0
The Types Of Commands .......................................................................................................12.1
Command Line Syntax ...........................................................................................................12.2
Result Codes..........................................................................................................................12.3
Basic AT Parameters..............................................................................................................12.4
Extended Commands..............................................................................................................12.5
Cellular CDMA Commands ....................................................................................................12.6
Layer 1 (Hardware) Communications............................................................................................13.0
RS-232 Serial Port Integration Parameters...............................................................................13.1
RJ-45 Ethernet Port Integration Parameters..............................................................................13.2
Quick Reference Guide ................................................................................................................14.0
CDMA Wireless Data Modem CDM819i/CDM820 Specifications .................................................15.0
CDM819i/CDM820 Mechanical Specifications .............................................................................16.0
End Cap Frontal Views ..........................................................................................................16.1
End Cap Overhead & Profile Views........................................................................................16.2

Mounting Flange Guide .........................................................................................................16.3
Copyright Notice.........................................................................................................................17.0
Limited Warranty........................................................................................................................18.0
Appendix ....................................................................................................................................19.0
Addressed Serial Protocol Specification...................................................................................19.1

1.0 Introduction
Thank you for purchasing the Land-Cellular Intelligent Modem. This guide makes
reference to the CDM819i and CDM820i modems collectively as the "modem". These
devices are CDMA2000-3G compatible and provide you with the convenience of a
wireless connection from anywhere CDMA cellular services are available. We are certain
that you will receive many years of outstanding performance from our product. This
guide will assist you in the set up and use of your new CDMA modem. Follow the
instructions below to install all necessary software/drivers and set up your computer or
data terminal to send and receive information via the cellular network.
The modem, set up as DCE in RS-232 specifications, has been designed to take
advantage of the more useful CDMA cellular network protocols such as 1xRTT and, in
the case of the Verizon carrier, DMU. The modem also supports applications which
employ a legacy v.250 (v.25ter, AT, Hayes compatible) modem interface. Typically,
these legacy applications do not support the PPP and TCP/IP transport utilized by the
digital cellular networks, but the modem is equipped to provide these protocols if the
need arises.
Internally, the modem is segregated into two major subcomponents. First, the digital
cellular module, which generates the Radio Frequency (RF) signal, is used to provide
connectivity to the cellular network. The second major subcomponent comes in the form
of an onboard RISC microprocessor which bridges the gap between your DTE
communications terminal and the digital cellular module. The modem’s firmware
processes the v.250 (AT) commands and other data before it is sent to the digital cellular
module. Any v.250 commands that the modems do not process internally may optionally
be passed to the digital cellular module in order to access cellular network specific
features. This provides a high level of customization for use in packet data services.
Please reference the AT+LCPAST command for more information on this feature.
Additionally, the device can be configured for use as standard circuit-switched cellular
data modem. In this mode, the Intelligent Modem acts as most any other land-line
modems. This mode allows compatibility with cellular networks which do not provide
CDMA packet data access.
1.1 Overview
AT commands, issued from your application, are used to control and configure the
modem. Through compatibility with the standard v.250 AT command set, these
commands can be used to control the basic functionality of the modem.
In addition, the modem extends the v.250 command with a set of Land Cellular
proprietary commands that can be used to configure and utilize unique features without
interfering with operation of the basic v.250 interface.
1.2 Modem Capabilities
The CDMA modem is tri-mode enabled. That is, it supports operations in AMPS
800MHz cellular, 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
industry-standard 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 14.0 has more
information on how to enter these operational modes
1.3 Operating States
In this manual, reference is made to Command State, Online Command State and Online
Data State, these states are defined as follows:
Command State:
In Command State, the modem is not communicating with a remote station, and is ready
to accept v.250 commands. Data from the local DTE are treated as command lines and
processed by the modem; with responses echoing back to the local DTE. The modem
enters this state upon power-up, and when a call is disconnected.
Online Command State:
In Online Command State, the modem is communicating with a remote station, but treats
data from the local DTE as command lines and sends responses back to the local DTE.
Data received from the remote station during Online Command State is buffered in the
modem until Online Data State is once again entered (by a command from the DTE).
Data previously transmitted by the local DTE and buffered in the modem will be sent
from the buffer to the remote station during Online Command State. Online Command
State may be entered from Online Data state through the use of the "+++" escape
sequence or via change of DTR state as configured by the "&D" command.
Online Data State:
In Online Data State, the modem is communicating with a remote station. Data signals
from the DTE are treated as data and transmitted to the remote station. Data received
from the remote station are delivered to the DTE. Data and control signals are monitored
by the modem to detect events such as loss of the remote connection and DTE requests
for disconnection or switching to Online Command State. Online Data State is entered by
successful completion of a command to originate or answer a call, by automatically
answering a call, by a DTE command to return to Online Data state from Online
Command state or in response to the DTR signal as configured by the "&D"command.
1.4 The Types Of Data Calls
This chapter describes some of the features and capabilities of the modem. Section 2.0
explains how to set up and test your modem using Hyperterminal. Understanding these
types of data calls may help you to integrate the module with other systems as well.
The module can make several types of data calls:
·Async Data:
Asynchronous Mode:
Transfers raw data between two computers.
·1x Packet Data:
QuickNet Connect (QNC):
QNC is an ISP option which allows access to the internet.
Verizon Dynamic Mobile IP Key Update (DMU):

This data service is proprietary to Verizon. The DMU option is a
customer account provisioning in the Verizon network and is a more
powerful subset of 1xRTT packet data.
1.5 Speeds
Data Rate From Your Computer To The Modem
The Land-Cellular CDM series data modems are capable of sending and receiving data at
high speeds. The modem has a default RS-232 speed of 57600bps. 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+IPRcommand. Please refer
to the FAQ for more information on changing the COM port speed. The modem's COM
port speed is variable from 300bps to 115.2Kbps.
Data Rate From The Modem To The Cellular Network
CDMA data transmission provides faster and more reliable connections than analog
technology. You can expect to connect at 14.4Kbps minimum speed, but speeds may
very well be higher. The speed at which you are able to connect is contingent upon many
factors such as: your location, carrier, proximity to the base station and other factors.
CDMA 3G-1x systems support data rates of up to 153.6Kbps.
1.6 Status Indicators
There are a total of four LED's on the Land-Cellular Intelligent Modem: two green, one
amber and one red. The green LED next to the DC power jack is the Power Indicator
LED. This LED will illuminate when power is applied to the modem. The other three
LEDs are grouped on the opposite end of the modem, next to the SMA antenna
connectors. Listed below are the specifications of the LEDs and their corresponding
colors.
POWER (Green)
The green Power LED indicates correct power is applied to the DC power input
jack.
DCD (Amber)
The amber Carrier Detect LED illuminates to indicate a connection to a remote
system or service.
1XRTT (Red)
The red 1XRTT LED will illuminate when 1XRTT coverage is detected or will
remain off when no 1XRTT coverage is available.
RSSI (Green)
Of the three radio link status indicators, the green LED is used to show Received
Signal Strength. There are three possible states that the RSSI LED can operate in,
based upon signal level:
· If the RSSI LED is powered off, this means thatthe RSSI is less than
-110dbm.
·When the RSSI level is between -110dbm and -90dbm, the LED will
flash about once a second.

·If the RSSI LED is on solid, this indicates an RSSI level of -90dbm or
greater.
While not in a data session, the modem checks for RSSI once every 5 seconds,
which causes the Tx/Rx LED to blink briefly.
2.0 Modem Setup Guide
This following subsections will assist in configuring your modem to interface and operate
with your data terminal.
2.1 Getting Started
1. Ensure that terminal emulation software such as Hyperterminal®or ProComm®is
installed on your system. Hyperterminal is preinstalled in most versions of Microsoft
Windows®.
2. Connect a serial cable from the RS-232 port on the modem to an enabled
communications port on your system. Please note that for most applications this must be
a straight through serial cable and not a null modem cable. See the FAQ, section 11.0, for
more information on when to use a Null Modem cable.
3. The following modem setup applies 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.
3.0 Using 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 any modems that are
currently installed in the computer. Do not attempt to connect to the modem via the
modem. 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 "57600". The "Data
bits" should be listed as "8", Parity "None", Stop Bits "1" and Flow Control "Hardware".
Click "Apply"and "OK". By default, the modem’s Flow Control protocol is Hardware,
but this can be adjusted with the AT+IFCcommand. 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 modem:
Bits Per Second: 57600
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 57600. 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 NeedA Null
Modem Cable?" section 11.11 in the FAQ. For further assistance, refer to the
"Troubleshooting" section 5.0 of this manual.
4.0 Activating The Modem
After issuing the AT command to verify communication with the modem, you are ready
to initiate the air link connection with the cellular 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.
4.1 Over-the -Air Provisioning
The CDM series supports the 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. To perform Over-the-Air Service
Provisioning, type: AT+CDV*22899†
After issuing the AT+CDV*22899†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. To make a circuit-switched connection, type this
command: ATD<phone number to call>.
If the modem did not properly dial the phone number you specified, here are a few things
to check:

First, make certain that you are not including any hyphens or spaces in the ATD
dialing string. For example, you should be entering ATD9544305811.
After verifying that you have properly entered the dialing string, if the modem
still will not place an outbound call, you may have to enter the phone number
into the modem before performing an Over-the-Air Provision. Please see sections
5.3 through 5.6.
5.0 Troubleshooting
In this section, you will find important information relating to the setup and diagnosis of
your modem. If you are having trouble communicating with the modem, please read this
"Troubleshooting" section and the "Frequently Asked Questions"section 11.0 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.
5.1 Helpful Hints
·Only assign one device to any given COM port on your system.
·The Land-Cellular CDM819i and CDM820i data modems have a default COM port
speedof 57600bps. 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 115.2Kbps. 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 57600bps,
first, connect via your terminal emulation software (settings: 57600bps, 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 11.0 for more
information pertaining to the AT+IPRcommand.
·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" to your system using the "Setting Up Your Modem"section 2.2
above. 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.
·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 11.11 titled "When Do I Need A Null Modem Cable?".
5.2 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&V†and press enter. The modem should
respond with several lines of configuration information. If you receive the lines of code,
then your computer and the modem are properly communicating.
To test the link between your modem and the cellular network, type: ATDT<phone
number to call>.This command will perform a circuit-switched call similar to the type a
standard home phone or modem would make. If the modem is communicating with the
cellular network, then you should connect to the phone number specified. 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:
1. Call the phone number of the modem. If the phone number is not active, the cellular
service will inform you of this.
2. Contact your cellular provider and make certain that the Electronic Serial Number
(ESN) of the modem is active in their system.
3. Check the signal strength reaching the modem using the following command:
AT+CSQ?†See also the FAQ for more information on "No Carrier" issues.
4. Attempt to relocate the modem and/or antenna to receive a stronger signal.
5. Make certain that the modem has been provisioned by the cellular network. To
provision the unit, issue this command: AT+CDV*22899†For more information, see the
"How Do I Perform An Over-the-Air Activation Of The Unit?" section 11.3 in the FAQ.
NOTE: Running diagnostics from Modem Properties may not work if the computer
attempts to communicate with the modem at an improper baud rate.
5.3 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, but still cannot provision the unit, you may need to program the Mobile
Identification Number(MIN), Mobile Country Code (MCC) and/or theMobile Network
Code (MNC). The next five sub-sections explain how to change these parameters.
If you simply need to enter the phone number (MIN), then follow these steps below:
AT+LCPAST=1
AT$KWMODE=1
AT$KWSPC=000000
AT$KWDIR=10-Digit Phone Number From Cellular Carrier (Without Hyphens)
AT$KWMODE=2
AT+CDV*22899
NOTE: The commands to alter the MIN, MCC and MNC communicate with the RF
module directly and as such require that the AT+LCPAST=1 command be issued before
proceeding. See the sections below for more information on altering the MIN, MCC and
MNC.
5.4 Entering Offline Digital Mode
In order to change the MIN, 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?†
5.5 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$KWSPC=000000†
5.6 Entering The Mobile Identification Number (MIN)
You may now enter the MIN/DIR given to you by your CDMA provider by typing:
AT$KWDIR=<10-digit phone number provided by CDMA carrier>†
NOTE: Enter the full 10-digit phone number without spaces or hyphens.
E.g.: AT$KWDIR=9544305811
5.7 Entering The Mobile Country Code (MCC)
It is only necessary to enter the Mobile Country Code (MCC) and Mobile Network Code
(MNC) if the modem is not already programmed for operation in your area. If required,
these codes are available from your CDMA provider. To change the MCC type:
AT$KWMCC=<3 digit MCC>†
5.8 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 and writes your configuration changes to non-volatile memory.
Your modem is now programmed for operation in the area. Theseconfiguration changes
will remain even if the modem loses power. Now that the modem is properly configured,
you may attempt OTASP as described in section 4.1.
6.0 v.250 Configuration Commands
The following section identifies some of the more useful industry-standard AT
commands as well as the Land-Cellular proprietary AT commands utilized to configure
how the CDM819i and CDM820i formats data inputs and responses. These commands,
and all others in this manual, are in addition to the industry-standard AT commands. Only
the Land-Cellular proprietary commands are covered in depth in this reference.
6.1 I Identification
"I" reports information to the host that may be used to help identify the product.
Default: N/A
Storage: N/A
Command values:

ATI Report product identity.
6.2 Z Soft Reset And Restore Saved Settings
The "Z"command will soft reboot the modem without removing power.
Default: N/A
Storage: N/A
Command values:
ATZ Resets the modem.
6.3 E Command Echo
While in command mode, "E" controls the echo of characters received by the modem
from the host.
Default: E1
Storage: &W
Command values:
ATE0 Disable echo of incoming characters in command mode.
ATE1 Enable echo of incoming characters in command mode.
6.4 Q Quiet Mode
While in command mode, controls whether the modem will send result codes and
unsolicited responses to the host. This does not suppress the modem from sending
solicited responses.
Default: Q1
Storage: &W
Command values:
ATQ0 Send result codes and unsolicited responses.
ATQ1 Do not send result codes and unsolicited responses.
6.5 V Result Code Form
Selects whether the modem sends long form (verbose) or short form (numeric) responses
to the host.
Default: 1
Storage: &W
Command values:
ATV0 Send short form (numeric) result codes
ATV1 Send long form (verbose) result codes
6.6 H Hang Up
This command instructs the modem to disconnect from the remote device; terminating
any session in progress.
Default: N/A

Storage: N/A
Command values:
ATH Disconnects the current session.
6.7 O Return To Online State
This command instructs the modem to return to online data state and issue a CONNECT
or CONNECT <text> result code.
Default: N/A
Storage: N/A
Command values:
ATO Returns to Online State.
6.8 +++ Enter Online Command State
If the modem detects the "+++" escape sequence in online data state the terminal will
enter Online Command State.
Default: N/A
Storage: N/A
Command values:
+++ Escapes to Online Command State.
6.9 &F Restore Factory Defaults
"&F" loads the modem's factory default configuration. The factory default values for
each parameter command can be found in the description for each command in this
documentation.
Default: N/A
Storage: N/A
Command values:
AT&F Resets the modem to factory defaults.
6.10 &W Save Configuration To Non-Volatile Memory
"&W" saves the modem's configuration to non-volatile memory. The saved configuration
values will be restored automatically on power up or if the "ATZ" command (reset) is
issued.
Default: N/A
Storage: N/A
Command values:
AT&W Saves all current settings to memory.
6.11 &D DTR Configuration

This parameter determines how the modem responds when the Data Terminal Ready
circuit changes state. The &D5 and &D6 settings allow customer specific applications to
be controlled via the DTR line.
Default: &D0
Storage: &W
Command Values:
AT&D0 Ignore DTR.
AT&D1 If in online data state, upon an on-to-off transition of
DTR, the modem enters online command state and
issues an OK result code; the call remains connected.
Otherwise, ignore DTR.
AT&D2 If in Online Data State or Online Command State upon
an on-to-off transition of DTR, the modem performs an
orderly clear-down of the call and returns to command
state. Automatic answer is disabled while DTR remains
off.
AT&D4 The modem auto-dials default remote station (as
determined by AT+LCPRFL) upon an off-to-on
transition of DTR and enters online data state. The
modem ends call and enters command state upon an
on to-offtransition of DTR.
AT&D5 The modem auto-dials default remote station (as
determined by AT+LCPRFL) upon an on-to-off
transition of DTR and enters online data state. The
modem ends the call and enters command state upon an
off-to-on transition of DTR.
AT&D6 Upon an on-to-off transition of DTR, the modem
performs an orderly clear-down of any session and turns
OFF the RF module. Upon an off-to-on transition of
DTR, the modem turns ON the RF module and re-
establishes the radio session as determined by the
AT+LCGASC setting.
AT&D7 Upon an on-to-off transition of DTR, the modem
performs an orderly clear-down of any session and turns
OFF the RF module. Upon an off-to-on transition of
DTR, the modem turns ON the RF module and re-
establishes the radio session.
AT&D8 Upon an on-to-off transition of DTR, the modem
performs an orderly clear-down of any session and turns
OFF the RF module. Upon an off-to-on transition of
DTR, the modem turns ON the RF module and re-
establishes the radio session and auto-dials the default

remote station (as determined by AT+LCPRFL)
6.12 &R RTS Configuration
This parameter determines how the modem responds when the Request To Send circuit
changes state. The state of this parameter may be affected by the state of the+IFC
parameter and vise versa, the last issued command takes precedence.
Default: &R0
Storage: &W
Command values:
AT&R0 Ignore RTS.
AT&R2 RTS Flow Control, if RTS is off the terminal will not
send data to the host.
6.13 &S DSR Configuration
This parameter determines how the modem controls the state of the Data Set Ready
circuit.
Default: &S0
Storage: &W
Command Values:
AT&S0 DSR always ON.
AT&S1 DSR ON when the RF signal present and phone
registered on network.
AT&S2 DSR ON when connected to CDMA.
AT&S3 DSR always OFF.
AT&S4 DSR controlled via I/O control feature.
6.14 &Q CTS Configuration
This parameter determines how the modem controls the state of the Clear To Send
circuit.
Default: &Q0
Storage: &W
Command values:
AT&Q0 CTS always ON.
AT&Q1 CTS always OFF.
AT&Q2 CTS flow control, the terminal will set CTS low if it is
unable to accept data from the host.
AT&Q3 CTS follows state of RTS.
AT&Q4 DSR Controlled via I/O control feature.
6.15 &C DCD Configuration
This parameter determines how the modem controls the state of the Carrier Detect circuit.
Default: &C1
Storage: &W

Command values:
AT&C0 DCD always ON.
AT&C1 DCD ON when connected to remote host.
AT&C2 DCD always OFF.
AT&C3 DSR controlled via I/O control feature.
6.16 &N RI Configuration
This parameter determines how the modem controls the state of the Ring Indicator
circuit.
Default: &N
Storage: &W
Command Values:
AT&N0 RI always ON.
AT&N1 RI simulates incoming ring.
AT&N2 RI always OFF.
AT&N3 RI controlled via I/O control feature.
AT&N4 RI acts as watchdog output (changes state once per
second under normal conditions).
6.17 AT+LCCROK Send OK Response To <CR>
Enables or disables sending of an OK response when the unit receives the <CR>
(carriage return) character by itself.
Default: 0
Storage: &W Command
Command values:
AT+LCCROK=0 Do not send OK in response to <CR>
AT+LCCROK=1 Send OK in response to <CR>
6.18 AT+LCNOLF Disable Sending <LF> In Response Messages
Enables or disables sending the <LF> (line feed) character in response messages.
Default: 0
Storage: &W Command
Command values:
AT+LCNOLF=0 Send <LF> in response messages
AT+LCNOLF=1 Do not send <LF> in response messages
6.19 AT+LCNOER Disable ERROR Response To Unknown Commands
Enables or disables sending an ERROR response to unknown commands. When the
ERROR response is disabled, the modem will instead send an OK response to unknown
commands. This may allow the modem to be used in applications where the host issues
AT commands that would otherwise be incompatible with the modem.
Default: 0

Storage: &W Command
Command Values:
AT+LCNOER=0 Send ERROR response to unknown commands.
AT+LCNOER=1 Send OK response to unknown commands
6.20 AT+LCPAST Pass Unknown v.250 Commands To The Cellular Module
Enables or disables pass-through of v.250 commands that the Intelligent Modem’s v.250
command interpreter does not recognize (i.e. any command not specifically listed in this
document) to the digital cellular module.
Default: 0
Storage: &W
Command values:
AT+LCPAST=0 Return ERROR or OK to unknown commands as per the
AT+LCNOER setting.
AT+LCPAST=1 Forwards only unknown commands to the internal RF
module. All recognized AT commands are executed by
the RISC processor.
AT+LCPAST=2 Pipe all commands to the internal RF module utilizing
UART #1.
AT+LCPAST=3 Pipe all commands to the internal RF module utilizing
UART #2
7.0 Session Management Commands
This Session Management section details the commands designed to facilitate connecting
via the cellular network. In many cases, use of these commands is not required, but will
allow much more flexibility, especially when connecting via 1xRTT.
7.1 AT+LCPRFL Profile Configuration
The AT+PRFL command allows one to configure up to three different dialing profiles
with such parameters as: Packet Data, Simple IP/Mobile IP, Username, Password, and
TCP/UDP connectivity, to name a few. There are a total of nine command line
arguments, denoted below as arguments number 1.) through 9.).
Default: 1,0,atd#777,,,-1,0,,232
2,0,atd#777,,,-1,0,,232
3,0,atd#777,,,-1,0,,232
Storage: Automatic
Command values:
AT+LCPRFL=<parameters listed below>
Defines a profile as per settings below.
AT+LCPRFL? Queries all current profile settings.
Argument Number/Type Parameters
1.) Profile Number: 1=First Saved Profile
2=Second Saved Profile
3=Third Saved Profile

2.) Connection Type: 0=SIP Only
1=Mobile IP Only
3.) Phone Number To Dial: atd#777-For High-Speed Data Calls
4.) Username: Username For This Connection
5.) Password: Password For This Connection
6.) Transport Method: 0=TCP Connection
1=UDP Connection
7.) Modem Functionality: 0=Modem Will Act As A Client
1=Modem Will Act As A Server
8.) Local serial protocol: 0=No encoding, data is sent without any
encapsulation
1=Encode with Addressed Serial Protocol
(See section 18.1 for details)
8.) IP Connection: Where:
vvv.www.xxx.yyy -The IP To Connect To
When Acting As A Client
vvv.www.xxx.yyy -The Trusted Incoming IP
To Listen To When Acting As Server
9.) Port Connection: zzzzz -Port To Connect To When Acting As A
Client.
zzzzz -Trusted Incoming Port To Listen To
When Acting As A Server
Example Profile Setup String:
AT+LCPRFL=1,1,atd#777,[email protected],vzw,0,1,209.42.39.164,80
This will set up profile number 1 with MIP Only, packet data (username:
[email protected] and password: vzw) and a TCP data transport. Further, this
particular session will sit online and function as a TCP server listening for a connection
from: 209.42.39.164 on port 80.
7.2 ATDnConnection String
The ATD[n] command will initiate a one-time connection utilizing the settings in the
referenced profile. ATD1 connects using profile #1, ATD2 connects using profile #3, etc.
ATD*<IP> will initiate an online session utilizing the same settings asAT+LCGASC=1
and then connect to the IP address listed after the asterisk.
Default: N/A
Storage: N/A
Command values:
ATD<profile number> To connect just this one session. Will not redial
if connection is lost or if DTR causes a disconnection.
ATD*<IP> Connects to the IP address specified. Connects
utilizing the same method as AT+LCGASC=1.
7.3 AT+LCGASC Enable 1xRTT Auto-Session Connect
Enables or disables automatic connection and log-in to the 1xRTT network.
Default: 0

Storage: &W Command
Command values:
AT+LCGASC=0 Maintain Command State unless a connection is
otherwise initiated with the ATDor ATD*<IP>
command. Also disconnects an existing session.
AT+LCGASC=1 Autoconnect to the 1x network via Profile #1
AT+LCGASC=2 Autoconnect to the 1x network via Profile #2
AT+LCGASC=3 Autoconnect to the 1x network via Profile #3
7.4 AT+LCGRST End Cellular Session
This command will kill the current RF session and bring the modem to Command State.
NOTE: This command will tear down the RF session in an orderly manner and may take
several seconds to complete.
Default: N/A
Storage: N/A
Command values:
AT+LCGRST Kills the current RF session.
NOTE: If AT+LCGASC=1, the modem will detect that the session dropped and will
immediately reconnect. To fully disconnect, set AT+LCGASC=0 and then issue the
AT+LCGRST command.
8.0 RS-232 PAD Configuration Commands
PAD, which stands for Packet Assembler/Disassembler, is a function employed by the
RISC processor to split the incoming data stream into discrete packets for transmission
over the cellular network. The commands in the following section explain how to set up
the PAD for your needs.
8.1AT+LCICTO Inter-Character Timer
This command is used to configure the Inter-Character timeout used by the PAD service
when assembling packets for transmission. The PAD will send a packet of data every
time the buffer is full (512 bytes) or if the serial line is idle for longer than the time
specified by this command.
Default: 50
Storage: &W
Command Values:
AT+LCICTO=<timeout>
Where <timeout> is a number between 0 and 65535
milliseconds.
8.2AT+LCIDCT Idle Disconnect Timer
This command is used to configure the Idle Disconnect timeout used by the PAD service.
Should no data be sent or received for the specified period of time, the connection will be
closed and the usual disconnect response generated. A value of 0 disables the use of the
idle disconnect timer.