Symetrix Telephone Headset Interface THI-101 - Manual (Page 2)

2
6408 216th Street SW | Mountlake Terrace, WA 98043 USA
T +1.425.778.7728 F +1.425.778.7727 | www.symetrix.co
QUICK START GUIDE: THI-101
Getting Started
THI-101 Connectors
The Telephone Headset Interface THI-101 has three
connectors. The connector labeled with a headset is for
connecting to the headset interface on a digital/VoIP phone.
There are two terminal-block connectors labeled INPUT and
OUTPUT. The terminal block connector labeled INPUT is
for routing balanced audio out from a Symetrix DSP device
and into the THI-101. The terminal block connector labeled
OUTPUT is for routing balanced audio into a Symetrix DSP
device and out from the THI-101.
Installation
To connect the Telephone Headset Interface THI-101 to a
VoIP/digital phone and a Symetrix DSP follow these steps.
$POOFDUUIFIFBETFUQPSUXJUIUIFJODMVEFEGPPU3+
22 crossover cable to the phone’s headset interface as
shown in the following figure.
2. Connect the terminal block connectors to a SymNet
DSP device as shown in the following figure.
*OTPNFDBTFT
EJGGFSFOUEJHJUBM7P*1QIPOFNPEFMT
use reverse wiring for the terminal block connectors.
No installation modifications are necessary. Simply use
the crossover switch to accommodate various wiring
configurations.
4. In certain circumstances, to prevent ground looping, use
the audio ground lift switch to disconnect the mic shield
from the chassis for noise isolation.
5. Add audio conferencing to Symetrix DSP systems by
using the telephone for dialing and answering calls.
6. The Telephone Headset Interface THI-101 can be set on
a desktop or mounted under any solid surface.