D&R Airlab User Manual page 26

Telco Module
Airlab TELCO input module
This input module is specially designed to accept a telephone line. An internal telephone
hybrid circuit simplifies connection of telephone lines and phone appliances.
There is a LINE input to accept external hybrids, a WALL connector for connecting to the
telephone line and a "TO PHONE" output that connects to the phone device.
Jumpers
Aux send pre/post and C balance are jumper enabled/disabled. All other functions are
software programmable.
TELCO SEND
The Telco send controls the outgoing signal to the caller. This can be either the MIX and/or
Sub output dependent upon the SUB/PROG switch settings in the Telco module. This
switch not only controls the assignment of the incoming signal to the masters but also which
signal is sent to the caller.
GAIN
The Gain control adjusts the gain of the incoming phone call within a range of -20 dBu to
+20 dBu. The range of the fader (VCA) gives an additional 10 dB of gain when needed.
LC (Low Cut)
The high pass filter smoothly filters out all frequencies below the pass band of the
telephone line.
HC (High Cut)
The low pass filter effectively filters out all above telephone line frequencies.
CONNECT
This LED indicates the internal Hybrid being active.
SUB
The SUB switch switches the Telco modules output to the SUB mix amps located in the
master section of the console.
PROGRAM
The PROGRAM switch switches the stereo modules output to the main mix amps located in
the master section of the console.
Auxiliary
The stereo auxiliary sends a post fader signal, dependent upon the 'ON' switch of the input
channel, to the master auxiliary busses. The PAN control creates a stereo image in the Aux
masters. This setup makes production work possible during ON-AIR broadcast.
Airlab from D&R Phone +31 294 418014, email: info@d-r.nl Page 26