1) An audio processing stage in the return channel to maintain constant the level during conferences. 2) 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 . . .

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1) An audio processing stage in the return channel to maintain constant the level during conferences.

2) 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.

3) 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.

4) Inputs use Nickel-Ferrite transformers that brings high inductance and excellent isolation to avoid humming or line noises

5) 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.

6) Lightning 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.

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