GAI-Tronics Electro Sound Electro-Sound Communication System - Manual (Page 4)

Pub. 42004-072D
Electro-Sound Communications System Page: 4 of 9
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-072d.doc
12/04
Permanent Stations
A permanent station has a permanently wired-in handset with a hook-switch to disconnect it from the
transmission line when it is placed on the hook (called an on-hook condition). These stations also have the
capability of muting a monitor speaker or a local page speaker.
There are three types of permanent stations:
• Permanent Indoor Station: These stations are approximately 12 inches (H) × 9 inches (W) × 4 inches
(D).
• Permanent Flush-mount Station: These stations are approximately 13 inches (H) × 4 feet (W) × 7
inches (D). See Figure 2.
• Permanent Outdoor Station: These stations are constructed of structural foam polycarbonate and are
approximately 15 inches (H)
× 12 inches (W) × 11 inches (D). See Figure 3.
Monitor Speaker
A Model 750 or Model 760 Series Speaker Amplifier can be used to drive a monitor speaker. The
amplifier can be used in two ways. When used with a non-paging system, the amplifier is connected to the
transmission line through a 0.22 mFd/80 volt capacitor. When used this way, the speaker will reproduce
everything that appears on the transmission line.
When used in a paging system, the speaker amplifier is connected to the page circuit of the power source
through a 0.22 mFd/80 volt capacitor. When used in this way, the speaker reproduces signals that appear
on the transmission line when the paging button is pressed. Up to 2 amplifiers may be connected in either
fashion without using an interface. The amplifier is powered by 115 V ac volts 50/60 Hz and can deliver
12 watts into the speaker, which may be 8- or 16-ohm impedance. See Figure 4 and Figure 5.
Figure 2. Figure 3.
Figure 4. Figure 5.