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External Hotline Phone. A standard phone, rather than a system
phone, should be used as an external hotline phone. Do not
connect an external hotline phone to extension 10 or 16 to keep
them available for power failure use. You can connect an external
hotline phone to extension 15 provided Music On Hold is not
activated.
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Auxiliary Equipment. There are a variety of ways to set up fax
machines, modems, answering machines, and credit card scanners to
work with the system. See Chapter 4 for advice on setting up this
equipment. To connect a telephone and a standard device on the
same extension, see “Combination Extensions” later in this appendix.
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In-Range Out-of-Building (IROB) Protectors. Required to prevent
electrical surges from damaging your system when phones or other
standard devices (such as a doorphone) are installed in a location other
than the building where the system modules are installed. The system
supports the AT&T IROB protector, which provides coverage for up to
1,000 feet (305 meters) for system phones and 3,000 feet (915 meters) for
standard devices. (IROBS must be installed by a qualified technician.)
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Off-Premises Range Extender (OPRE) allows you to connect a standard
touch-tone phone beyond 3000 feet (915 meters) in another building on
the same continuous property. It also allows you to use a special circuit
from your local phone company to provide off-premises station capability.
Limitations for Standard Devices
You can connect a standard device to your system, regardless of the
manufacturer. However, the following limitations apply:
It must be industry standard and non-proprietary. That is, it cannot be
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made specifically for use on a particular telephone system. (For
example, you cannot connect an AT&T MERLIN® phone because it is
designed for use on a MERLIN system.)
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Its Ringer Equivalence Number (REN*) cannot be greater than 2.0. (The
REN is shown on a label on the device, usually on the bottom.)
In addition to industry-standard equipment, you can connect a variety of other
devices—see Chapter 1. Follow the instructions provided with the equipment
for installation and use.
C-6 Installation