the AT Command Set
Answering, and Hanging Up
Configuring with DIP Switches
Result Code Displays
and Configuring the Courier 56K Business Modem Remotely
Error Control, Data Compression, and Throughput
Querying and Help Screens
Line and Synchronous Applications
Meanings and Sets
V.25 bis Reference
Regulatory Information and Limited Warranty
Courier 56K Business Modem Command Reference
Manufacturers Declaration of Conformity
935 National Parkway
Schaumburg, IL 60173-5157
declares that this product conforms to the FCCs specifications:
Part 15, Class B:
Operation is subject to the following conditions:
1) this device may not cause harmful electromagnetic
2) this device must accept any interference received including interference
that may cause undesired operations.
This equipment complies with Part 15 for Home and Office use.
Caution to the User:
The user is cautioned that any changes or modifications not expressly
approved by the party responsible for compliance could void the users
authority to operate the equipment.
This equipment complies with FCC Rules Part 68. Located on the bottom
of the modem is the FCC Registration Number and Ringer Equivalence Number
(REN). You must provide this information to the telephone company if requested.
The REN is used to determine the number of devices you may legally connect
to your telephone line. In most areas, the sum of the REN of all devices
connected to one line must not exceed five. You should contact your telephone
company to determine the maximum REN for your calling area.
This equipment may not be used on coin service provided by the telephone
company. Connection to party lines is subject to state tariffs.
An FCC compliant telephone cord and modular plug are provided with this
equipment, which is designed to connect to the telephone network or premises
wiring using a Part 68 compliant compatible jack. See installation instructions
for details. This equipment uses the following USOC jacks: RJ-11C. The
telco cable needs to be connected with a minimum 26AWG telephone cable.
UL Listing/CUL Listing:
This information technology equipment is UL-Listed and CUL-Listed for
both the U.S. and Canadian markets respectively, for uses described in
The Telephone Consumer Protection Act of 1991 makes it unlawful for any
person to use a computer or other electronic device, including fax machines,
to send any message unless such message clearly contains in the margin
at the top or bottom of each transmitted page or on the first page of
the transmission, the date and time it is sent, an identification of the
business or other entity, or other individual sending the message, and
the telephone number of the sending machine or of such business,
other entity, or individual. (The telephone number provided may not be
a 900 number or any other number for which charges exceed local or long-distance
transmission charges.) In order to program this information into your
modem, refer to the software on the CD-ROM that shipped with your modem.
If you are using a different communication software program, refer to
Radio and Television Interference:
This equipment generates, uses, and can radiate radio frequency energy.
If this equipment is not installed and used in accordance with the manufacturers
instructions, it may cause interference to radio and television communications.
The modem has been tested and found to comply with the limits for a Class
B computing device in accordance with the specifications in Part 15 of
FCC rules, which are designed to provide reasonable protection against
such interference in a residential installation.
For Canadian Modem Users
Industry Canada (IC)
This digital apparatus does not exceed the Class B limits for radio noise
emissions from digital apparatus set out in the interference-causing equipment
standard entitled Digital Apparatus, ICES-003 of Industry Canada.
NOTICE: The Ringer Equivalence Number (REN) assigned to each terminal
device provides an indication of the maximum number of terminals allowed
to be connected to a telephone interface. The terminal device on an interface
may consist of any combination of devices subject only to the requirement
that the sum of the Ringer Equivalence Numbers of all devices does not
exceed 5. The Ringer Equivalence Number is located on the bottom of the
NOTICE: The Industry Canada (IC) label identifies certified equipment.
This certification means the equipment meets certain telecommunications
network protective, operational, and safety requirements as prescribed
in the appropriate Terminal Equipment Technical Requirements document(s).
The Department does not guarantee the equipment will operate to the user's
satisfaction. Before installing this equipment, users should ensure that
it is permissible to be connected to the facilities of the local telecommunications
company. The equipment must also be installed using an acceptable method
of connection. In some cases, the company's inside wiring associated with
a single-line, individual service may be extended by means of a certified
connector assembly (telephone extension cord). The customer should be
aware that compliance with the above conditions may not prevent degradation
of service in some situations. Currently, telecommunication companies
do not allow users to connect their equipment to jacks except in precise
situations that are spelled out in tariffing arrangements with those companies.
Repairs to certified equipment should be coordinated by a representative
designated by the supplier. Any repairs or alterations made by the user
to this equipment, or equipment malfunctions, may give the telecommunications
company cause to request the user to disconnect the equipment.
«AVIS: Cet appareil numérique respecte les limites de bruits
radioélectriques applicables aux appareils numériques de
classe B prescrites dans la norme sur le matériel brouilleur: "Appareils
Numériques", NMB-003 édictée par l'Industrie
L'étiquette d'Industrie Canada identifie le matériel homologué.
Cette étiquette certifie que le matériel est conforme aux
normes de protection, d'exploitation et de sécurité des
réseaux de télécommunications, comme le prescrivent
les documents concernant les exigences techniques relatives au matériel
terminal. Le Ministère n'assure toutefois pas que le matériel
fonctionnera à la satisfaction de l'utilisateur.
Avant d'installer ce matériel, l'utilisateur doit s'assurer qu'il
est permis de le raccorder aux installations de l'entreprise locale de
télécommunication. Le matériel doit également
être installé en suivant une méthode acceptée
de raccordement. L'abonné ne doit pas oublier qu'il est possible
que la conformité aux conditions énoncées cidessus
n'empêche pas la dégradation du service dans certaines situations.
Les réparations de matériel homologué doivent être
coordonnées par un représentant désigné par
le fournisseur. L'entreprise de télécommunications peut
demander à l'utilisateur de débrancher un appareil à
la suite de réparations ou de modifications effectuées par
l'utilisateur ou à cause de mauvaisfonctionnement.
We, USRobotics Corporation of 935 National Parkway, Schaumburg, Illinois,
60173-5157 USA, declare under our sole responsibility that the product,
Courier 56K Business Modem, to which this declaration relates, is in
conformity with the following standards and/or other normative documents.
We hereby declare that the above named product is in compliance with
all the essential requirements and other relevant provisions of Directive
The conformity assessment procedure referred to in Article 10(3) and
detailed in Annex II of Directive 1999/5/EC has been followed.
Network Compatibility Declaration:
This equipment is designed to work satisfactorily on all European Union
PSTNs (Public Switched Telephone Networks).
This equipment is supplied with a suitable PSTN connector for the country
in which it was supplied. If it is required to use this equipment on a
different network to the one for which it was supplied, the user is advised
to contact the vendor for guidance regarding connection.
FRS Europe BV.
1332 AC Almere
935 National Parkway
Schaumburg, Illinois, 60173
USRobotics Corporation Limited Manufacturers Warranty
Courier 56K Business Modem
HARDWARE: USRobotics warrants to the end user (Customer)
that this hardware product will be free from defects in workmanship and
materials, under normal use and service, for the following length of time
from the date of purchase from USRobotics or its authorised reseller:
USRoboticss sole obligation under this express warranty shall
be, at USRoboticss option and expense, to repair the defective
product or part, deliver to Customer an equivalent product or part to
replace the defective item, or if neither of the two foregoing options
is reasonably available, USRobotics may, in its sole discretion, refund
to Customer the purchase price paid for the defective product. All products
that are replaced will become the property of USRobotics. Replacement
products may be new or reconditioned. USRobotics warrants any replaced
or repaired product or part for ninety (90) days from shipment, or the
remainder of the initial warranty period, whichever is longer.
SOFTWARE: USRobotics warrants to Customer that each software program
licensed from it will perform in substantial conformance to its program
specifications, for a period of ninety (90) days from the date of purchase
from USRobotics or its authorised reseller. USRobotics warrants
the media containing software against failure during the warranty period.
No updates are provided. USRoboticss sole obligation under this
express warranty shall be, at USRoboticss option and expense,
to refund the purchase price paid by Customer for any defective software
product, or to replace any defective media with software which substantially
conforms to applicable USRobotics published specifications. Customer
assumes responsibility for the selection of the appropriate applications
program and associated reference materials. USRobotics makes no warranty
or representation that its software products will meet Customers
requirements or work in combination with any hardware or applications
software products provided by third parties, that the operation of the
software products will be uninterrupted or error free, or that all defects
in the software products will be corrected. For any third-party products
listed in the USRobotics software product documentation or specifications
as being compatible, USRobotics will make reasonable efforts to provide
compatibility, except where the non-compatibility is caused by a bug
or defect in the third party's product or from use of the software product
not in accordance with USRobotics published specifications or user
THIS USRobotics PRODUCT MAY INCLUDE OR BE BUNDLED WITH THIRD-PARTY
SOFTWARE, THE USE OF WHICH IS GOVERNED BY A SEPARATE END USER LICENSE
AGREEMENT. THIS USRobotics WARRANTY DOES NOT APPLY TO SUCH THIRD-PARTY
SOFTWARE. FOR THE APPLICABLE WARRANTY, PLEASE REFER TO THE END USER LICENSE
AGREEMENT GOVERNING THE USE OF SUCH SOFTWARE.
OBTAINING WARRANTY SERVICE: Customer must contact a USRobotics Corporate
Service Centre or an Authorised USRobotics Service Centre within the
applicable warranty period to obtain warranty service authorization. Dated
proof of purchase from USRobotics or its authorised reseller may be
required. Products returned to USRobotics Corporate Service Centre
must be pre-authorised by USRobotics with a Return Material Authorization
(RMA) number or User Service Order (USO) number marked on the outside
of the package, and sent prepaid and packaged appropriately for safe shipment,
and it is recommended that they be insured or sent by a method that provides
for tracking of the package. Responsibility for loss or damage does not
transfer to USRobotics until the returned item is received by U.S.
Robotics. The repaired or replaced item will be shipped to Customer, at
USRoboticss expense, not later than thirty (30) days after U.S.
Robotics receives the defective product.
USRobotics shall not be responsible for any software, firmware, information,
or memory data of Customer contained in, stored on, or integrated with
any products returned to USRobotics for repair, whether under warranty
WARRANTIES EXCLUSIVE: IF A USRobotics PRODUCT DOES NOT OPERATE AS
WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL
BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT U.S.
ROBOTICSS OPTION. TO THE FULL EXTENT ALLOWED BY LAW, THE FOREGOING
WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES,
TERMS, OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION
OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES, TERMS, OR CONDITIONS
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, SATISFACTORY QUALITY,
CORRESPONDENCE WITH DESCRIPTION, AND NON-INFRINGEMENT, ALL OF WHICH ARE
EXPRESSLY DISCLAIMED. USRobotics NEITHER ASSUMES NOR AUTHORISES ANY
OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE
SALE, INSTALLATION, MAINTENANCE, OR USE OF ITS PRODUCTS.
USRobotics SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING
AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT OR MALFUNCTION IN THE
PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S
MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORISED ATTEMPTS
TO OPEN, REPAIR, OR MODIFY THE PRODUCT, OR ANY OTHER CAUSE BEYOND THE
RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, POWER CUTS
OR OUTAGES, OTHER HAZARDS, OR ACTS OF GOD.
LIMITATION OF LIABILITY. TO THE FULL EXTENT ALLOWED BY LAW, USRobotics
ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED
IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL,
INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE
OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION OR DATA, OR OTHER FINANCIAL
LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE,
USE, PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF U.S.
ROBOTICS OR ITS AUTHORISED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY
OF SUCH DAMAGES, AND LIMITS ITS LIABILITY TO REPAIR, REPLACEMENT, OR REFUND
OF THE PURCHASE PRICE PAID, AT USRoboticsS OPTION. THIS DISCLAIMER
OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN
SHALL FAIL OF ITS ESSENTIAL PURPOSE.
DISCLAIMER: Some countries, states, or provinces do not allow the exclusion
or limitation of implied warranties or the limitation of incidental or
consequential damages for certain products supplied to consumers, or the
limitation of liability for personal injury, so the above limitations
and exclusions may be limited in their application to you. When the implied
warranties are not allowed to be excluded in their entirety, they will
be limited to the duration of the applicable written warranty. This warranty
gives you specific legal rights which may vary depending on local law.
GOVERNING LAW: This Limited Warranty shall be governed by the laws of
the State of Illinois, U.S.A. excluding its conflicts of laws principles
and excluding the United Nations Convention on Contracts for the International
Sale of Goods.
935 National Parkway
Schaumburg, IL 60173