GAI-Tronics 10959-201 and 10959-203 Wall-mount Audio Messenger Interface - Manual (Page 13)

Pub. 42004-403F
M ODEL 10959-201 AND -203 W ALL -M OUNT A UDIO M ESSENGER I NTERFACES P AGE 11 of 20
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Level Adjustments
Display Brightness
R237 on the Main PCBA adjusts the brightness of the LCD display on the front of the assembly.
Phone Line Levels
On the optional Telephone Interface PCBA two potentiometers adjust telephone audio levels. The
Receiver Volume potentiometer, R36, adjusts the volume level from the telephone line. The Transmit
Volume Potentiometer, R1, adjusts the volume to the telephone line.
Party Line Levels
On the Page/Party ® Interface PCBA two potentiometers adjust party line audio levels. The Party Volume
potentiometer, R66, adjusts the volume level to the party line. The Party Sidetone Potentiometer, R30,
adjusts sidetone level from the party line.
Page Line Levels
On the Page/Party ® Interface PCBA two potentiometers adjust page line audio levels. The Page Volume
potentiometer, R39, adjusts the volume level to the page line. The Page Monitor potentiometer, R69,
adjusts monitor level of audio activity from the page line.
Jumper Settings
600-Ohm Line Termination
The unit can terminate the 600-ohm line with 600 ohms for impedance matching. P5 on the termination
board in position 1-2 terminates the line to 600 ohms. P5 in position 2-3 (default) does not terminate the
line.
AUDBUS1 Termination
The unit can terminate the AUDBUS1 with 600 ohms for impedance matching. P1 on the termination
board in position 1-2 terminates the line to 600 ohms. P1 in position 2-3 (default) does not terminate the
line.
AUDBUS2 Termination
The unit can terminate the AUDBUS2 with 600 ohms for impedance matching. P6 on the termination
board in position 1-2 terminates the line to 600 ohms. P6 in position 2-3 (default) does not terminate the
line.
Audio Contact Supervision
The unit can configure the audio contact (AUD ACT) to an unsupervised or a supervised contact. P11 on
the termination board in position 1-2 configures the audio contact to be supervised for use with an
ADVANCE control cabinet. P11 in the position 2-3 (default) configures the audio contact to an isolated
SSR contact.