A VoCALL Emergency Voice Communications System (EVCS) is a fixed, secure, bi-directional, full duplex
voice communication system to assist fire fighters in an emergency in high rise buildings or large sites
where Radio communication may not work, and covers the operation of both fire telephones and
disabled refuge systems.
The VoCALL EVCS is designed to fully comply with BS5839-Part 9 (abb. Pt9) for use as a fire telephone
system, disabled refuge call system or as a combined system when both fire telephones and disabled
refuge points are required.
Suitability
Fire telephone systems are recommended for all public buildings and multi story buildings over four
floors by BS9999.
Disabled refuge systems are required in buildings where public or disabled staff gain access to any floor
other than the ground floor using lifts.
Product Overview
A VoCALL EVCS compact 5 line exchange unit comprises of 2 functional blocks, the compact 5 line
exchange unit and outstations, (Type A, Type B, Jack Points and Emergency Assist Alarm), with the
quantities of these basic units being adjusted to suit the application.
The VoCALL EVCS compact has been designed on a star topology; in the most cases this will reduce
the cable requirements from all ring-based systems. The topology consists of spurs formed from 1 off
two core core 1mm CSA cables (soft skin enhanced up to 500m per leg, MICC 200m per leg) to each
outstation.
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VoCALL Compact 5 Line Exchange Unit
Important Safety Information
This equipment must only be installed and maintained by suitably skilled and competent person. This
equipment is defined as Class 1 in EN60065 (Low Voltage Directive) and must be EARTHED.
CAUTIONINDOOR USE ONLY
WARNINGSHOCK HAZARD- ISOLATE BEFORE OPENING
WARNINGTO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
WARNINGTHIS UNIT MUST BE EARTHED
WARNINGNO USER SERVICABLE PARTS
Each compact unit requires a 3A spur, returning to a breaker clearly marked EVCS DO NOT TURN OFF. If
the units are distributed around a site it is essential all units are on the same mains phase, as they are
classified TEN 230V, powering from different phases can mean a 440V potential can be present in a unit
during a major fault incident.
DO NOT EXPOSE THIS UNIT IN RAIN OR MOISTURE
ANTI-STATIC HANDLING GUIDELINES
Make sure that electro-static handling precautions are taken immediately before handling PCBs and
other static sensitive components.
Before handling any static-sensitive items, operators should get rid of any electrostatic charge by
touching a sound safety earth, such as a radiator. Always handle PCBs by their sides and avoid touching
any components. PCBs should be stored in a clean, dry place that is free from vibration, dust and
excessive heat.
Storing the PCBs in a suitable cardboard box will also guard them against mechanical damage.
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VoCALL Compact 5 Line Exchange Unit
Batteries
The VoCALL compact requires one number 12V 4.5AH sealed lead acid batteries to provide backup
power in the event of mains failure as defined in BS5839pt9 for 24 hours standby and 3 hours operation
when powered by normal mains supply.
For 72hour standby and 1 hour operation one number 12V 17AH battery is required, this will need to be
fitted in an external battery enclosure, the monitored charger in the VoCALL compact is capable of
charging and monitoring these batteries.
Safety Information:
Sealed Lead acid batteries contain sulphuric acid which can cause burns if exposed to the skin,
the low internal resistance of these batteries means large currents will flow if they are accidentally
short circuited, causing burns and a risk of fire- exercise caution when handling batteries.
Power Up Procedure:
Always apply mains power before connecting batteries, do not commission VoCALL Compact on
batteries, as the high inrush current required by the power supply may rupture the battery fuse.
Always connect the Positive (Red +) terminal first.
Power Down Procedure:
Disconnect the batteries before removing the mains power; always remove the negative
(Black – terminal) first.
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VoCALL Compact 5 Line Exchange Unit
Operation
All conversations on the VoCALL compact system are under the command of the control handset,
Pt9 envisages the majority of calls to be made by lifting the handset of an outstation (Type A) or pressing
the call button (Type B).
Receiving a Call
Lift the receiver; press the zone key where the Green LED is flashing. When connected the Green
LED will go steady and the outstation will be connected to the handset.
To end hang-up receiver or press the zone key again to place the outstation on HOLD (the zone led
will flash slowly when held).
Making a Call
Lift the receiver; press the zone key for the required outstation, the Green LED on the zone key will
flash. When the outstation answers the call the Green zone LED will go steady and the handset will
connect to the called outstation.
To end the call, hang-up receiver or press the zone key again to place the outstation on HOLD (the zone
led will flash slowly when held).
Conference Call
Up-to five calls can be conference called, by answering the calls or dialling the calls as described above
the master handset must be involved in the call and only one conference group is allowed.
Accepting Faults
Note the fault in the log book, then press the mute buzzer key this will silence the “waterfall” tone, while
the fault exists the fault buzzer will “beep” once every 15 seconds until the fault is rectified. The buzzer
will resound on each new fault.
Panel Test
Press and hold the mute buzzer key for 5 seconds, the fault buzzer will sound and all status LEDs will
Light.
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