Page 2 Hybrid Coupler Installation and Operations Manual
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Hybrid Coupler
The Hybrid Coupler is a two-way, passive telephone coupler. This means
that it allows the operator to simultaneously send and receive audio over a
single telephone line without external or internal power for operation.
Its primary application is sending and/or receiving audio over telephone
lines. The unit connects directly to the telephone line and can be used with
almost any analog or digital telephone system.
Front-Panel Controls
When the switch on the front of the Hybrid Coupler (See Figure 2, left.) is in
the TAP position [3], the internal hybrid coil is connected to the telephone
line through a coupling capacitor. This permits the unit to monitor the
telephone line without seizing or loading it.
With the switch on the front of the Hybrid Coupler in the SEIZE position [2],
the hybrid coil is directly connected to the telephone line, which terminates
the line. This allows the operator to hang up the telephone set and maintain
an open telephone line.
When in the OFF position [2], the internal hybrid coil is not connected to the
telephone circuit.
The Hybrid Coupler’s internal hybrid coil provides approximately 10dB of
audio separation (null) between the incoming receive and outgoing send
audio. The amount of separation can be adjusted slightly with the front-
panel NULL trim pot [4].
Back-Panel Connectors
The Hybrid Coupler’s telephone LINE [8] and SET [7] connectors (See
Figure 3, left.) are paralleled connections to an internal hybrid coil.
The SEND [5] and RECEIVE [6] jacks are unbalanced audio feeds to and
from the internal hybrid coil.
The Hybrid Coupler is designed to couple seamlessly with almost any analog or
digital telephone line. However, to maximize your installation process, prepare
your site by taking the following factors into consideration:
Telephone Line Requirements
The Hybrid Coupler accommodates standard telephone lines and connects to
the telephone system (analog or digital) with a standard RJ11C modular
jack. If you do not have an RJ11C jack where you want to install your
Hybrid Coupler, call your telephone company for installation.
Equipment Placement
The Hybrid Coupler, being portable, is designed for easy placement in any of
a wide variety of small, enclosed spaces. The only requiremnt is that it be
placed close enough for cable connections to telephone line and system and
any other outside audio equipment.
Product
Description
Before You
Install
Figure 3. HybridCoupler backpanel
Figure 2. HybridCoupler frontpanel
