In general, most PA systems use dedicated microphones (for example – a desktop pager or a zone microphone) for making voice paging announcements. Dedicated microphones can be very reliable and will provide years of service if maintained and looked after properly. However, developments in technology have made it possible to use telephone systems to make announcements rather than dedicated microphones.
There are many benefits to using telephone paging systems including:
There are several techniques and technologies for connecting a telephone system into a paging system. The way to set up a Telephone Paging System will depend on the existing telephone system and the facilities required.
The most cost effective way is to use the paging port output on the telephone. This output is usually an audio line level signal that can be wired into an audio input on the PA amplifier via a low cost barrier interface unit. The barrier interface unit provides electrical isolation of the two systems; this is beneficial as an electrical fault on one system will not cause any damage to the other. The user can simply pick up the telephone handset and dial a facility code on the system which is normally a star command. A page announcement can be made live; then the PA call can be ended by hanging up on the telephone.
Another method of connecting a telephone system into a paging system is by using a telephone paging extension interface. This is a device that can be plugged into an interface phone extension and then connect to a public address system. The user can dial the designated extension number for the paging interface and then makes the announcement as soon as the call has been picked up by the telephone paging extension interface device.
There are several advantages for using a telephone paging extension interface rather than a paging port output including:
There are a wide range of professional products available on the market to enable telephone paging and PA system integration.
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