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Model 298 ADA-Compliant Emergency Telephone
Pub. 42004-304A
f:\standard ioms - current release\42004 instr. manuals\42004-304a.doc
06/02
Additional Information, Canada
Notice
The Canadian Department of Communications label identifies certified equipment. This certification
means that the equipment meets certain telecommunications network protective, operational and safety
requirements. The Department does not guarantee the equipment will operate to the user's satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities
of the local telecommunications company. The equipment must also be installed using an acceptable
method of connection. In some cases, the company's inside wiring associated with a single line individual
service may be extended by means of a certified connector assembly (telephone extension cord). The
customer should be aware that compliance with the above condition may not prevent degradation of service
in some situations.
Repairs to some certified equipment should be made by an authorized maintenance facility designated by
the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions,
may give the telecommunications company cause to request the user to disconnect the equipment.
Users should ensure for their own protection that the ground connections of the power utility, telephone
lines and internal metallic water pipe system, are connected together. This precaution may be particularly
important in rural areas.
CAUTION
Users should not attempt to make such connections themselves, but should contact the appropriate
electric inspection authority, or electrician, as appropriate.
The RINGER EQUIVALENCE NUMBER (REN) assigned to each terminal device denotes the percentage
of the total load to be connected to a telephone loop that is used by the device, to prevent overloading. The
termination on a loop may consist of any combination of devices subject only to the requirement that the
total of the REN of all devices does not exceed 5.
The REN for the Model 298 Emergency Telephone is 0.5.
Maintenance
The printed circuit assembly in this telephone is protected from transient voltage spikes across the
telephone line by voltage-limiting devices and a replaceable fuse. Under normal operating conditions, the
voltage-limiting devices will never have to be replaced; however, the protective fuses are designed to open
during an extended transient voltage condition. This fuse is mounted on the printed circuit board assembly
(PCBA) 69149-102.
To replace the fuse, remove the power from the unit. Use a GAI-Tronics Model 233 Tamper-Resistant
Screwdriver (sold separately) to open the front panel of the telephone. Pry the fuse from the printed circuit
card and replace with a UL-recognized ¼ ampere ceramic slow-blow fuse, available from GAI-Tronics as
the Model 12604-003 Replacement Fuse Kit.
