Specifications

RFC-1 Safety Information and FCC Compliance page 1.2
1.2 FCC Compliance
The RFC-1 complies with Part 68 of the FCC rules. On the rear panel of the RFC-1 is a label that contains, among
other information, the FCC registration number and ringer equivalence number (REN) for this equipment. If
requested, this information must be provided to the telephone company.
The REN is used to determine the number of devices that may be connected to the telephone line. Excessive RENs
on the telephone line may result in devices not ringing in response to an incoming call. In most areas, the sum of the
RENs should not exceed 5.0. Contact the local telephone company to determine the maximum REN for the calling
area.
The RFC-1 is designed for use with standard modular (RJ-11C) telephone jacks.
The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect
the operation of the RFC-1. If this happens, the telephone company usually provides advance notice in order for you
to make the necessary modifications to maintain uninterrupted service.
If the RFC-1 causes harm to the telephone network, the telephone company will notify you in advance of service
disconnection. If advance notice isn't 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.
Please contact Sine Systems, Inc., for repair and/or warranty information if you suspect that the RFC-1 has
malfunctioned. If a defective device is causing harm to the telephone network, the telephone company may request
you remove that device from the network until the problem is resolved.
The RFC-1 cannot be used on public coin service telephone lines. Connection to Party Line Service is subject to
state tariffs. Contact your state public utility commission, public service commission, or corporation commission for
information.
The RFC-1 is registered with the Federal Communications Commission and is certified to meet specific safety
requirements. It is important that the RFC-1 not be modified in any way. Modification of this equipment will void the
FCC certification, void the warranty, and perhaps pose a hazard to the user of this equipment or to maintenance
personnel of your local telephone company.
Service should only be performed by qualified technicians that are familiar with the implications of FCC Part 68
registration. Extreme caution should be used if the RFC-1 case is opened while still connected to the telephone line.
High voltages may be present on telephone lines.