EA915X DIGITAL TELEPHONE HYBRID
INSTRUCTIONS FOR USE
EELA AUDIO Het Riet 8A
5431NM CUIJK The Netherlands
Page 7
Voltageless lines.
In some occasions (some in-house telephone exchanges) the telephone line does not carry any
voltage for the extensions. Within the hybrid you can find 4 jumpers with which its telephone
circuit can be adapted to this different application regarding these telephone lines. The factory
setting for these jumpers is in the position for the hybrid to be used on normal telephone lines
(carrying linevoltage).
NEVER
use the setting for the voltageless lines on a normal telephone line
which does carry a voltage, because this could seriously
DAMAGE
the hybrid. In the drawings
below, both settings are shown.
Use 2 or 4 Wire mode in EELA AUDIO consoles ?
Because of the excellent low hybrid crosstalk, the telephone module in the EELA AUDIO mixing
consoles can be set in the 4W mode (dilswitch position or central processor setting). This means
talking into the return output of the mixing console to the hybrid (and to the caller) is no longer
blocked when the fader is open and the hybrid is on air.
Connections.
Adjustment of the DIL switches can be done on the rear side of the unit. The following other connections
can be found on the back side of the unit.
Power.
To this inlet the seperate mainsplug power supply (2x18V-AC) has to be connected.
Use only the power supply included in the delivery; check for the correct mains voltage.
Line set as voltageless input
Line set as normal telephone line
