Important Information
D
3162-A2-GB20-30 March 1999
Government Requirements and Equipment Return
Certain governments require that instructions pertaining to CSU connection to the telephone network be included in
the installation and operation manual. Specific instructions are listed in the following sections.
United StatesNOTICE TO USERS OF THE UNITED STATES TELEPHONE NETWORK
1.This equipment complies with Part 68 of the FCC rules. On the bottom of the DSU/CSU is a label that contains,
among other information, the FCC registration number. If requested, this information must be provided to the
telephone company.
2.The T1 network connection should be made using a Universal Service Order Code (USOC) type RJ48C jack. The
Service Order Code 6.0F should be specified to the telephone company when ordering the T1 line. In addition,
the proper Facility Interface Code must be specified to the telephone company. The DSU/CSU can be configured
to support any of the following framing format and line signaling techniques. The DSU/CSU configuration must
correspond to the T1 line’s parameters.

DSU/CSU Facility Interface Codes

Code Description

04DU9-BN 1.544 Mbps superframe format (SF) without line power
04DU9-DN 1.544 Mbps SF and B8ZS without line power
04DU9-1KN 1.544 Mbps ANSI ESF without line power
04DU-1SN 1.544 Mbps ANSI ESF and B8ZS without line power
3.An FCC compliant telephone cord and modular plug is provided with this equipment. This equipment is designed
to be connected to the telephone network or premises wiring using a compatible modular jack which is Part 68
compliant. See the installation instructions for details.
4.If the DSU/CSU causes harm to the telephone network, the telephone company will notify you in advance that
temporary discontinuance of service may be required. But if advance notice is not practical, the telephone
company will notify the customer as soon as possible. Also, you will be advised of your right to file a complaint
with the FCC if you believe it is necessary.
5.The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect
the operation of the equipment. If this happens, the telephone company will provide advance notice in order for
you to make the necessary modifications in order to maintain uninterrupted service.
6.If you experience trouble with this equipment, please contact your sales or service representative (as appropriate)
for repair or warranty information. If the product needs to be returned to the company service center for repair,
contact them directly for return instructions using one of the following methods:
Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com
Via Telephone: Call our automated call system to receive current information via fax or to speak with a
company representative.
—Within the U.S.A., call 1-800-870-2221
—Outside the U.S.A., call 727-530-2340
If the trouble is causing harm to the telephone network, the telephone company may request that you remove the
equipment from the network until the problem is resolved.