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Telephone hybrids
STEP 8- CONNECT A TELEPHONE HYBRID
1) CONSOLE PHONE INPUT- A telephone hybrid has an audio input and an audio output. The hybrid audio output is the callers voice and is connected to the
source input channel TEN on the console.
2) CONSOLE MIX MINUS OUTPUT- The input to the hybrid is from the console PHONE OUT connector on the back of the console. A mix minus bus is a special
audio mixing bus that contains all audio on the console program bus MINUS the callers voice. In this way the caller hears everything except himself. If he was not
"minused" from the mix, then the caller would feed back to himself.
3) CONTROL LOGIC- The hybrid has two ways to "answer" the caller and pick up the telephone line: front panel manual control of the hybrid itself and remote
control. For manual control, an On and Off button will be located on the front panel of the hybrid. For remote control, the PHONE LOGIC back panel connector
(RJ45) must have a custom cable connecting it to the console source start/stop logic. The logic is dry reed relay closures for both Start and Stop as shown
below.
4) CALIBRATION- The console PHONE IN and PHONE OUT connectors are set for +4dBu levels. These connectors have trim pots next to their respective XLR con-
nectors
5) FACTORY CABLES- Arrakis has prebuilt cables for audio and logic available for a variety of source equipment. Refer to "Factory Cables" later in this section
and on the Arrakis website (www.arrakis-systems.com)
STEP 8- CONNECT A TELEPHONE HYBRID
On/off
Audio
Logic
Input
Cue
Ch 14
Air
Mon
ARC-15BP
L
L
L
Headphone
RS232
R
R
R
Logic
DC Power
In
In
In
Out
I N S T A L L A T I O N I N S T R U C T I O N S
Audio
Output
PMM
Aud
Pgm
Phone Logic
Pgm Left
Pgm Rght
Phone
L
L
R
R
AMM
Out
Out
Ground
Out
Out
Out
Back panel Diagram for ARC-15BP console
BACK PANEL HYBRID LOGIC CONNECTOR
RJ45 WIRING STANDARD COLORS
PIN
Wire Color
1
White w/Orange Stripe
2
Orange w/White Stripe
3
White w/Green Stripe
4
Blue w/White Stripe
5
White w/Blue Stripe
6
Green w/White Stripe
7
White w/Brown Stripe
8
Brown w/White Stripe
A reed relay makes a momentary closure between the two START
contacts (pins 5 & 6) and a second reed relay makes a momentary clo-
sure between the two STOP contacts (pins 7 & 8). The same reed relays
make the same closures with a 100 ohm series resistance to Pins 1,2,3,4
Ch 15 Phone
Ch 14
Ch 13
Ch 12
Ch 11
Ch 10
Ch 9
Ch 8
Mic Ch 5
PC
48V
USB
In
pwr
In
4.9
1,2,3,4,5,6,7,8
Audio
Start w 100 ohms
Start w 100 ohms
Stop w 100 ohms
Stop w 100 ohms
Start
Start
Stop
Stop
Ch 7
Ch 6
Ch 5
Ch 4
Ch3
Ch 2
Mic Ch 4
In
RJ45
Mic Ch 3
Mic Ch 2
Mic Ch 1
Arrakis
Systems
In
In
In
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