Comdial Air Impact DSU, Manual

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2.22 FCC Rules And Regulations
This electronic key system complies with Federal Communications Commission (FCC) Rules, Part 68. The FCC
registration label on the common equipment cabinet contains the FCC registration number, the ringer equivalence
number, the model number, and the serial number or production date of the system.
Notifying The Telephone Company
Unless a telephone operating company provides and installs the system, the telephone operating company which
provides the lines must be notified before a connection is made to them. The lines (telephone numbers) involved,
the FCC registration number, and the ringer equivalence number must be provided to the telephone company. The
FCC registration number and the ringer equivalence number of this equipment are provided on the label attached to
the common equipment. The user/installer is required to notify the telephone company when final disconnection of
this equipment from the telephone company line occurs.
Understanding Telephone Network Compatibility
When necessary, the telephone operating company provides information on the maximum number of telephones or
ringers that can be connected to one line, as well as any other applicable technical information. The telephone
operating company can temporarily discontinue service and make changes which could affect the operation of this
equipment. They must, however, provide adequate notice, in writing, of any future equipment changes that would
make the system incompatible.
Understanding Installation Requirements
Connection of the electronic key system to the telephone lines must be through a universal service order code
(USOC) outlet jack supplied by the telephone operating company. If the installation site does not have the proper
outlet, ask the telephone company business office to install one. The correct outlet jack for this system is either a
type RJ21X or type RJ14C.
Understanding Party Line And Coin Line Limitations
Local telephone company regulations may not permit connections to party lines and coin lines by anyone except the
telephone operating company.
Troubleshooting The Service Problem
If a service problem occurs, first try to determine if the trouble is in the on-site system or in the telephone company
equipment. Disconnect all equipment not owned by the telephone company.
If this corrects the problem, the faulty equipment must not be reconnected to the telephone line until the problem has
been corrected. Any trouble that causes improper operation of the telephone network may require the telephone
company to discontinue service to the trouble site after they notify the user of the reason.
Authorizing Repairs
FCC regulations do not permit repair of customer owned equipment by anyone except the manufacturer, their
authorized agent, or others who might be authorized by the FCC. However, routine repairs can be made according to
the maintenance instructions in this publication, provided that all FCC restrictions are obeyed.
Digital Telephone System IMI66–107
2 – 80 Installing The DSU