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Government Requirements
D3160-A2-GB22-10 December 1996
Government Requirements and Equipment Return
Certain governments require that instructions pertaining to DSU/CSU and modem connection to
the telephone network be included in the installation and operation manual. Specific instructions
are listed in the following sections.
United States
NOTICE TO USERS OF THE UNITED STA
TES TELEPHONE NETWORK
1. This equipment complies with Part 68 of the FCC rules. On the equipment is a label that
contains, among other information, the FCC registration number and ringer equivalence
number (REN) for this equipment. The label is located on the bottom of the 3160/3164
DSU/CSU, and on the 3161 DSU/CSU circuit card. If requested, this information must be
provided to the telephone company.
2. There are two types of telephone lines associated with the standalone equipment. 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 T
elephone 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. The 3160/3164 DSU/CSU internal modem
connects to the Public Switched Telephone Network using a USOC T
ype RJ1
1C jack. The
Facility Interface Code 02LS2 along with the RJ1
1C jack should be specified to the
telephone company when ordering a dial line for the modem. The 3161 DSU/CSU
connects to the T1 network using the multi-line USOC-type RJ48H jack and does not have
a PSTN interface.
316x 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. The ringer equivalence number (REN) is used to determine the quantity of devices which
may be connected to the telephone line. Excessive RENs on the telephone line may result
in the devices not ringing in response to an incoming call. In most, but not all areas, the
sum of the RENs should not exceed five (5.0). To be certain of the number of devices that
may be connected to the line, as determined by the total RENs, contact the telephone
company to determine the maximum RENs for the calling area.
4. If the 316x 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
.