Most Public Address (PA) / 'Tannoy' systems we see today employ dedicated microphone/s for making voice announcements. Microphones have been used in this way since the introduction of PA, providing a quality and reliable means of system input.
Moving forward in time - with the ubiquitous use of telephones we now see so freely available, it is possible to interface these to most existing or new PA / 'Tannoy' systems with the introduction of a Telephone Interface Unit. Primarily, this unit does exactly what it says, it provides an interface for someone using a telephone to connect and make PA / tannoy announcements. There are a number of benefits and capability improvements provided by telephone interface units when used in this way, when compared to traditional microphones.
Telephone Interface Units provide location independence
By adding a telephone interface to a PA / 'Tannoy' system, we have introduced the ability to make announcements and paging calls from telephones. Telephones are not special or dedicated functionally in the way that microphones are. They are regular telephones, that might be local to the building, the site, or in fact they can be anywhere, national or even international. With this location independence, we find customers realising benefit and capability improvements such as:
- 'Anyware' system access: Telephone interface enables PA system access between buildings, across large sites, muti-sites
- First aid / responder: Use of telephones through the PA system to inform or call for help
- No expensive microphone equipment installation or cabling, also simplifies adds, moves and changes
- Telephone Interface Units can often provide 'recorded' announcements. Users only release their announcement message when happy
- Audio Loop: Avoid audio 'feedback' between microphones and speakers
Recorded Announcements - user confidence and avoiding audio 'loops'
Some telephone interface devices offer the capability and option to pre-recording announcements / paging calls before they are released to the PA / Tannoy system for broadcast. This popular option provides confidence to the person making the announcement to record the message, and only release it for broadcast when they are happy. Pre-recorded announcements made in this way also helps to avoid audio 'loop' issues (eg. a live announcement made within 'ear-shot' of a speaker).
VoIP Telephone Access - AoIP
SIP VoIP telephones can also be used to make announcements through the PA system. Running SIP firmware, a SIP IP Audio 'decoder' unit registers for service from the host SIP/IP telephony system. The SIP IP decoder unit is used to interface to traditional amplified Public Address (PA) / 'Tannoy' equipment (as shown). Alternatively (or collectively), SIP IP speakers can also be used - adding additional install and location flexibility without the need of traditional mixing/amplification equipment.