EA915X DIGITAL TELEPHONE HYBRID
INSTRUCTIONS FOR USE
EELA AUDIO Het Riet 8A
5431NM CUIJK The Netherlands
Page 8
Receive.
This is the signal coming from the caller so being the output of the hybrid. This signal should be
fed into the input of an audio mixing console.
Send.
This is the signal to be sent to the caller and is the input signal for the hybrid. This signal comes
from a (clean feed) output of the audio mixing console.
Line.
Connection for the telephone line.
Phone.
Connection for a normal telephone set to which the line is looped when the hybrid is off. This
allows the user to dial a connection, have a pre-conversation with a caller or answer an incoming
call.
In/Out/Remote.
On this connector the control inputs and outputs can be found for remote control. Apart from on the XLR's,
the receive and send signals also can be found here, thus enabling the hybrid to be connected to an EELA
AUDIO mixing desk using one multicore cable. The EA915x can be used with Eela Audio mixing consoles.
With the Logos mixing console, a 1 to 1 (1:1) cable can be used.
The ADAPT signal has the same functionality as the UPDATE button on the front side of the hybrid.
PIN NR
SIGNAL
REMARKS
PIN 1
CH.GND
Chassis ground, meant for the cable screen.
PIN 2
In-phase signal of receive output.
PIN 3
In-phase signal of receive output.
PIN 4
L+
In-phase SEND signal (left).
PIN 5
R+
In-phase SEND signal (right).
PIN 6
EXT_ON
With a connection to GND, the unit can be switched on.
PIN 7
ADAPT_EXT
With a connection to GND, the unit can be updated (see UPDATE button)
PIN 10
RING+
Ring optocoupler output (colector) for external signalling
PIN 14
RECEIVE-
Out-of-phase signal of receive output.
PIN 15
RECEIVE-
Out-of-phase signal of receive output.
PIN 16
L-
Out-of-phase SEND signal (left).
PIN 17
R-
Out-of-phase SEND signal (right).
PIN 18
GND
Ground for EXT_ON input.
PIN 19
GND
Ground for ADAPT_EXT output.
PIN 22
RING-
Ring optocoupler output (emitter) for external signalling.
Alignment hybrid.
When all settings and connections are made, the level and balance of the hybrid have to be
adjusted to be able to get the most optimal result. Use a screwdriver with a not to small blade in
