GAI-Tronics 12600-002 Line Current Boost Circuit Assemblies - Manual

Pub. 42004-433C
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 „ 800-492-1212 „ Fax: 610-796-5954
V ISIT WWW . GAI - TRONICS . COM FOR PRODUCT LITERATURE AND MANUALS
G A I - T R O N I C S ® C O R P O R A T I O N
A H U B B E L L C O M P A N Y
Model 12600-002 and 12600-40x
Line Current Boost Circuit Assemblies
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics.
GAI-Tronics retains all intellectual property and other rights in or to the information contained herein,
and such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.
General Information
This manual covers the following models of the GAI-Tronics Line Current Boost Circuit Assemblies:
The GAI-Tronics Line Current
Boost Circuit (LCBC)
Assemblies are designed to
augment available line current
to an analog 2-wire bridged
ringing telephone line. They are
designed specifically to provide
an additional 30 mA line current
to a GAI-Tronics line-powered
emergency telephone.
Telephone and PBX lines typically provide 20–35 mA or less line current to analog telephone
instruments. Several devices, including GAI-Tronics’ line of RED ALERT
® emergency telephones,
require additional line current to drive speakers, power optical coupling devices, and electronic devices
such as microprocessors. The additional line current provided by the LCBC provides sufficient line
current for a substantial increase in audio power to
the emergency telephone speaker.
Operation
The LCBC is designed to be installed anywhere
along the telephone line, preferably at a main or
intermediate distribution location. A CMOS
differential amplifier and two threshold compactors
are used to monitor the dc voltage across the phone
line (tip and ring).
Model Description
12600-002 Single Channel Line Current Boost Circuit
12600-401 4-Channel, DC-powered Line Current Boost Circuit
12600-402 8-Channel, DC-powered Line Current Boost Circuit
12600-403 4-Channel, AC-powered Line Current Boost Circuit
12600-404 8-Channel, AC-powered Line Current Boost Circuit
Figure 1. Model 12600-002