Avaya programming and use, Installation And Use Manual, Page: 318 / 468

PARTNER
®
Advanced Communications System Installation, Programming, and Use
Tip/Ring Device Requirements
9-2
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Specialty Handsets are designed for those individuals who need greater functionality than
that provided by the handsets on system telephones and single-line telephones. For example,
an amplified handset is available for all PARTNER phones for hard-of-hearing users.
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In-Range Out-of-Building (IROB) protectors are required to prevent electrical surges from
damaging your system when telephones or other devices (such as a doorphone) are installed
in a location other than the building where the control unit is installed. IROBs must be installed
by a qualified technician.
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Off-Premises Range Extender (OPRE) allows you to connect a single-line touch-tone
telephone beyond 3,000 feet (915 meters) in another building on the same continuous
property.
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Electromagnetic Interference (EMI) filters block “noise” generated by a nearby radio
station, as well as most electrical devices.
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Caller ID devices allow you to store and process Caller ID information. Although the system
provides Caller ID on system display phones, you can connect other devices if you subscribe
to the service from your local telephone company and connect the device directly to the Caller
ID line, not to an extension jack.
Tip/Ring Device Requirements
9
A tip/ring device must meet the following conditions:
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It must be nonproprietary; that is, it cannot be made specifically for use on a particular
telephone system.
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Its Ringer Equivalence Number (REN) cannot be greater than 2.0. (REN) is a measure of the
power it takes to ring a telephone. Each extension jack in your system handles up to 2.0
RENs.) The REN is shown on a label on the device, usually on the bottom.
You can connect a tip/ring two-line device to the system, but it should be installed and
used as if it were a single-line device.