BEU SYSTEM PRACTICES
AT& TCo Standard
SECTION
512-750-100
Issue
1,
August
1981
"TELEHELPER*" SPEAKERPHONE SYSTEM
IDENTIFICATION, INSTALLATION, CONNECTION, OPERATION,
AND MAINTENANCE
1.
GENERAL
1.01
This section contains information on the lOA
transmitter-receiver (TELEHELPER speak
erphone). The TELEHELPER speakerphone (Fig. 1)
is a one piece rectangular shaped unit referred to in
this section as speakerphone. The speakerphone is
equipped with modular jacks and can be readily con
nected to residential single line modular rotary or
TOUCH-TONEt dial desk or wall telephone sets.
1.02
Whenever this section is reissued, the reason
for reissue will be listed in this paragraph.
1.03
A D-181062 Kit of Parts is required when the
speakerphone is to be wall mounted in con
junction with a wall telephone set (Fig. 2).
Note:
The speakerphone is not intended for
use with multiline or business telephones and
cannot be used on party line service.
2.
IDENTIFICATION
2.01
The speakerphone is available only with a
dark brown (-104) base and an ivory (-50)
cover (Fig. 3). The base contains a sliding battery and
cord connections cover (Fig. 5). Under this cover are
two compartments; the larger one is for a standard
9-volt alkaline battery, the other contains two modu
lar jacks. The eight conductor jack is labeled LINE,
the six conductor jack is labeled PHONE (Fig. 5).
2.02
Design Features:
•
Modular cord connected
•
Compatible with both rotary and TOUCH
TONE service
*Trademark of American Telephone and Telegraph Company.
tRegistered Trademark of American Telephone and Telegraph
Company.
•
Battery powered voice actuated transmit and
receive switching
•
Line powered receive amplifier
•
No ac power required
•
Weak battery alarm
•
Battery interlock (battery not in circuit un
less battery and cord connection cover is
closed)
•
Built in polarity guard.
2.03
Operational Features:
This speakerphone is not compatible
with all network facilities due to
limited available loop current, and
may not function properly in all
cases. When connected to facilities,
such as analog loop carrier systems
(SLC-1 and SLC-8 type) and long
loops (over 1300 ohms) the volume
and fidelity of the receive speech
from the loudspeaker may not be
acceptable.
•
Both dialing and ringer alerting accom-.
plished through the associated telephone set
•
Speakerphone can be used for answer only
(no associated telephone set)
•
All nonassociated telephone sets on same line
must be a minimum of 10 feet from speaker
phone to prevent feedback
•
Dialing on associated telephone set can only
be accomplished with speakerphone in the
OFF position
•
With speakerphone switch in the ON position
associated telephone set is disconnected
NOTICE
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A.
BSP
512-750-100-i01-i01_198·01.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 23,2012 22:55:31
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