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FCC regulations require that the following information be provided in this manual:
1. This equipment complies with Part 68 of the FCC rules. On the bottom of the ESP DBU card is
a label that shows the FCC registration number and ringer equivalence number (REN) for this
equipment. If requested, provide this information to the telephone company.
2. If this equipment causes harm to the telephone network, the telephone company may temporarily
discontinue service. If possible, advance notification is given; otherwise, notification is given
as soon as possible. The telephone company will advise the customer of the right to file a
complaint with the FCC.
3. The telephone company may make changes in its facilities, equipment, operations, or
procedures that could affect the proper operation of this equipment; advance notification and
the opportunity to maintain uninterrupted service are given.
4. If experiencing difficulty with this equipment, please contact ADTRAN for repair and
warranty information. The telephone company may require this equipment to be
disconnected from the network until the problem is corrected, or it is certain the equipment is
not malfunctioning.
5. This unit contains no user-serviceable parts.
6. An FCC compliant telephone cord with a modular plug is provided with this equipment. This
equipment is designed to be connected to the telephone network or premises wiring using an
FCC compatible modular jack, which is Part 68 compliant.
7. The following information may be required when applying to the local telephone company for
dial backup service:
Service Type REN/SOC FIC USOC
56 kbps Digital Interface 6.0F 04DU5-56 RJ-48S
64 kbps Digital Interface 6.0F 04DU5-64 RJ-48S
Loop Start (V.34) 0.8B/0.4A 02LS2 RJ-11C
8. The REN is useful in determining the quantity of devices you may connect to your telephone
line and still have all of those devices ring when your number is called. In most areas, the sum
of the RENs of all devices should not exceed five. To be certain of the number of devices you
may connect to your line as determined by the REN, call your telephone company to
determine the maximum REN for your calling area.
9. This equipment may not be used on coin service provided by the telephone company.
Connection to party lines is subject to state tariffs. (Contact your state public utility
commission or corporation commission for information.)