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PRACTICE 512-6261-200
1.
GENERAL
1.01 The CONFERENCE 2000 teleconference
terminal permits voice-switched handsfree con-
versation between two or more geographically separated
groups. CONFERENCE 2000 is powered by a sepa-
rate transfonner, and it can be operated at any location
where a telephone jack and an ac outlet are readily
available.
1.02 The CONFERENCE 2000 differs from a
COMPANION*
or LOGIC* handsfree unit in
that the omnidirectional microphone and loudspeaker
are located in the acoustic unit
An
automatic gain
control and amplifier circuit is incorporated to limit the
signal level to the line for persons who may be seated
close to the microphone or speak louder than necessary.
1.03 The CONFERENCE 2000 is available in four
models: the Q_TAF2A3, the QTAF2B3, the
QTAF2C3 and the QTAF2D3. All models comprise
the following primary items:
• Acoustic unit
• Acoustic unit cable
• Control module
• Chairman's earphone
t
• Power supply.
Note:
Refer to Table A for comparative model
listing of field replaceable standard items and
optional equipment
,
..
~-~-
EARPHONE JACK
VOLUME CONTROL
1.04 The OTAF2A3 and QTAF2B3 models replace
the OT AF2Al. The QT AF2C3 model CON-
FERENCE 2000 replaces
the QTAF2D1, and
includes the optional NE-D16QD control module
mounting cord as standard equipment The NE-D 16QD
cord is used to connect the control module to other than
LOGIC-type telephone sets; this optional cord is also
available for use on the QT AF2A3 and OT AF2B3
and QTAF2D3. The QTAF2D3 model is
0.L.
listed
and for the U.S. Market.
1.05
If
required,
customer-provided external micro-
phones and mixer may be used with the
CONFERENCE 2000.
2. CONTROLS, JACKS AND INDICATOR
2.01
Volume Control.
This control permits the user to
adjust the volume of the loudspeaker to the desired
level.
It
does not affect the level of the transmitted
signal.
2.02
Earphone Control.
This control permits the
adjustment of the volume of the earphone to the
desired level. The control does not affect the level of the
transmitted signal.
2.03
Tone Control.
This rotary control permits the
user to reduce the receive signal level for frequencies
higher than 1 kHz. It
is
useful on short line loops where
there is less attenuation of the higher frequencies.
2.04
Microphone Switch.
This rotary switch permits
the following:
• Selection of internal microphone
• Selection of external microphone
• Switching off of all microphones.
/
MICROPHONE
SWITCH
/
TONE CONTROL
•
•
- - - - -
EARPHONE CONTROL
•
OFF
KEY
ON
KEY
Fig. 2 - Control Module
t
Not included
with
QTAF2A3 model.
•COMPANION and LOGIC are trademarks of Northern Telecom Limited
Page 2
Revised, 84 07
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