here to enlarge block diagram
Hybrid HL 202 owes its excellent audio quality to its advanced design.
We give this Block Diagram, in order to fully understand the Solidyne technology
will find that our Phone Hybrids incorporates technologies almost never
before in units of other brands. For example:
An audio processing stage in the return channel to maintain constant
the level during conferences.
Audio processing in the returning channel. This process
makes unnecessary the operator continuous correction of the send level.
On the other hand, it increases the intelligibility of the voice, allowing
listening in noisy environment. Band limiter filters eliminates the
return of out of band components, to maintain the quality of the local
voice when the hybrid is on-air.
HL 202 has 2, 4 or up tp 6 internal mix-minus buses. This way it
is possible to obtain perfect conferences because it has cross gain
of 8 dB, so that all the remote callers can be listened to each other.
Inputs use Nickel-Ferrite transformers that brings high inductance
and excellent isolation to avoid humming or line noises
Terrestrial lines or cellular phone It allows managing simultaneous
telephone communications by phone lines (2 wires mode) or cellular phone
(4 wires mode) . The commutation is automatic, when RJ11 connector is
plugged the cellular is detected.
protection. Using metal oxide varistor (SIOV) the HL 202 hybrid
is protected against high voltage. A 2 KV test capacitor discharge is
done at each unit to be approved at factory.