P
AGE
2
44118-0798 <90-00003>
ORDERING INFORMATION
NOTE:
This section lists the different options available for this product. To order any of the avail-
able options, contact Dantel Inside Sales through our toll-free number,
1-800-432-6835.
OPTION NUMBER
FEATURES
A11-44118-00
Active Distribution Bridge
GENERAL DESCRIPTION
T
he 44118 Active Distribution Bridge (44118 ADB) is a plug-
in printed circuit module that fits into any 400-type or
similar equipment housing.
The 44118 ADB can be used as:
♦
A four-way/four-wire bridge
♦
An eight-way/four wire bridge using two modules
♦
A general purpose summing and distribution amplifier
The front panel includes test jacks and level controls for each
port, allowing complete alignment of the bridge.
A combined distribution output port provides alignment and
operation of a common DTMF decoder or monitor speaker.
The 44118 ADB operates on -21 to -56 VDC input power.
CIRCUIT DESCRIPTION
F
ig. 1 shows the functional schematic for the 44118 Active
Distribution Bridge. The circuit consists of:
♦
Four line receive circuits
♦
Four transmit distribution networks
♦
Four line transmit circuits
♦
Four receive distribution networks
♦
A summing bus
♦
A combined distribution circuit
♦
A power regulator
Here is a brief description of each of the functional parts of the
circuit:
Line Receive Circuits
Each of the four line receive circuits contains:
♦
A test jack
CONTINUED
. . .
