Sitec Delta, Operator'S Manual

Page: 17 / 40

...keeping you secure
Increasing Attenuation
Reducing Attenuation
hold press
press hold
Hold down the “Attenuation” button. The display
shows the current attenuation level (preset at “8”).
Press the “+” button. Each time it is pressed, the
attenuation is increased by one level up to the
maximum.
Hold down the “Attenuation” button. The display
shows the current attenuation level (preset at “8”).
Press the “-“ button. Each time it is pressed, the
attenuation is decreased by one level down to the
minimum.
The attenuation level should only be increased far enough to achieve an optimum suppression
of feedback. The higher the attenuation level, the greater the risk that individual syllables may
be cut out of conversations.
If the maximum “F” level is reached, the system will be working in half-duplex mode. In this
case, the direction of speech not in use will be completely suppressed, which could cause
problems if people speak simultaneously at both sides.
Often, in adverse conditions, optimum communication can only be achieved if there is a
compromise between volume and attenuation.
If, in particularly adverse conditions, there is no optimum communication using the automatic
speech equaliser, the intercom can be used in alternating speech mode. In this mode only the
communication from outside inwards is active, so that the employee hears what is said on the
customer side. In order to speak to the customer, the employee has to switch the direction of
speech manually. He does this by holding down the “mute” button while he is speaking.
Alternating speech mode is activated using menu function 0 of the set up menu. Please see
page 24 for further information.
Note: In systems with several extensions, volume and attenuation and alternating speech
mode can be set up individually for each connection. If a headset is connected to the system,
the volume can also be set separately for that.
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Version 1.2