GAI-Tronics 703-004 Indoor Emergency Party Line Amplifier Enclosure - Manual (Page 4)

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Model 703-004 Indoor Emergency Party Line Amplifier Enclosure Pub. 42004-621L2A
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10/03
Wiring
Attach the conduit to the enclosure. Feed the wiring through the conduit and bring it into the enclosure.
See Figure 2. Follow the wire colors carefully because the colors noted in the figure correspond to GAI-
Tronics 60029 Series multi-party cable. The wires must be spade-lugged and connected securely to the
terminal block. An improper termination can result in diminished station performance.
Local Muting
Figure 2 illustrates local speaker muting when stations are completely assembled and paging operation
occurs. Normally, when the station button is pressed, the paging speaker connected to that station is
silenced (muted) to prevent acoustic feedback to the handset microphone. However, while the handset is in
use for party line conversations, the paging speaker is “live” to enable paging calls from other stations.
To disable the mute feature, follow these instructions:
1. Locate the lugged violet wire attached to terminal point 7 (mute) on the terminal block within the
enclosure.
2. Transfer the lugged violet wire to terminal point 8 (Page L1).
After any muting changes are made, unpack the station amplifier and install.
Mutual Muting
In the event that feedback occurs within an area and repositioning of the system speakers does not help,
mutual muting may be used to correct this problem.
The following steps will mutually mute the adjacent amplifiers/handsets within a zone.
1. Ensure that the purple lugged wire is connected to terminal 7 of TB1.
2. Connect terminal TB1-7 of the handset station to TB1-7 of the station within the zone that is causing
feedback. This is done by using the spare system wire (orange conductor) from within the system
cable that runs between the stations.