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VoCALL Fire Telephone & Disabled Refuge Network System
Introduction
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 comprises of three functional
blocks, the network master handset
(CFVCM/CFVCWM) the network eight line
exchanges (CFVCX8) and outstations, (type A,
type B, jack points or emergency assit alarms),
with the quantities of these basic units being
adjusted to suit the application.
The VoCALL EVCS has been designed on a star
and ring network topology; in the most cases
this will reduce the cable requirements from all
ring-based systems and star systems. The
topology consists of a ring formed from either 2
off four core 1mm CSA cables (soft skin up to
500m per leg, MICC 200m per leg) or 1 four pair
0.5mm CSA fire rated data cable Draka 91-021.
The exchange units and the control handsets sit
on this ring and communicate using a high
speed balanced RS422 network, a bi-directional
audio pair and a power pair, which provides an
ELV maintained supply to the control handsets.
VoCALL EVC System
6-8 Bishops Gate
System Healthy
Navigation
General Fault
Panel Fault
Supply Fault
Exchange Fault
Healthy
AC
DC
Network
Compliant to 5839-9:2003
VoCALL EVC System
6-8 Bishops Gate
System Healthy
Navigation
General Fault
Panel Fault
Supply Fault
Exchange Fault
Healthy
AC
DC
Network
Compliant to 5839-9:2003
Compliant to 5839-9:2003
VoCALL EVC System
6-8 Bishops Gate
System Healthy
Navigation
General Fault
Panel Fault
Supply Fault
Exchange Fault
Healthy
AC
DC
Network
Compliant to 5839-9:2003
