JK Audio Four IFB - Manual (Page 3)

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This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own
expense.
Changes or modifications not expressly approved by JK Audio
can void the user's authority to operate the equipment.
FCC Part 15 Compliance
Your new JK Audio product has been registered with the
Federal Communications Commission (FCC). This product
complies with the standards in Part 68 of the FCC rules.
1. Connection and use with the nationwide telephone
network
The FCC requires that you connect this telephone
equipment to the national telephone network through a
USOC RJ-11C modular telephone jack.
This equipment may not be used with Party Line Service or
Coin Telephone Lines
This equipment is hearing aid compatible.
2. Information for the telephone company
Upon request from your local telephone company, you are
required to provide the following information:
a) The "line" to which you will connect the telephone
equipment (that is, your telephone number), and
FCC Registration
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Introduction
Four IFB is a four position analog telephone line interface de-
signed specifically to provide flexible listen only IFB* for television
field production use. In addition to the four line- level balanced
XLR outputs, the unit is equipped with one balanced XLR line level
monitor input and one balanced XLR monitor output. Each IFB
output, and the monitor input / output jacks, may be separately
connected to one of the four analog phone lines through the use of
rotary line selector switches. A telephone handset may also be
connected for use with the monitor line selector switch. Level of
each of the six XLR jacks is adjustable individually with independ-
ent volume controls.
Individual on-hook/off-hook function for each phone line is con-
trolled by the Monitor Add and Drop switches. The phone line to
be controlled with these switches is determined by the Monitor ro-
tary line selector switch. On-hook / off-hook relay condition will be
maintained regardless of whether an active POTS line is physically
connected to the unit, or if the unit is in a powered "on" state or
not. Temporary power loss will not disconnect an active phone
line.
The position of the monitor rotary line selector switch determines
which line is added or dropped. Calls may be placed directly from
the unit with the integrated DTMF keypad. No external dialer is
needed.
Four IFB is designed to be used in a variety of environments and
weather conditions. Although the unit is not "waterproof", all con-
trols and components are dust and moisture resistant. A non-
removable hinged cover protects the unit's selector switches, add/
drop buttons and keypad while the enclosure design protects the
volume controls from physical damage. When used in a wet or
damp environment, battery power is recommended.
*IFB is a broadcast industry acronym which stands for Interruptible
Fold Back. The IFB signal is typically a Program Line (PL) signal
from the studio console.