IEC 62820-3-1:2017

IEC 62820-3-1 ®
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Building intercom systems –
Part 3-1: Application guidelines – General

Systèmes d'interphone de bâtiment –
Partie 3-1: Lignes directrices d'application – Généralités

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IEC 62820-3-1 ®
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Building intercom systems –
Part 3-1: Application guidelines – General

Systèmes d'interphone de bâtiment –

Partie 3-1: Lignes directrices d'application – Généralités

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.320 ISBN 978-2-8322-5142-3

– 2 – IEC 62820-3-1:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 System planning and design . 9
4.1 General . 9
4.2 System type selection . 9
4.2.1 General . 9
4.2.2 Functional requirement . 9
4.2.3 Performance . 9
4.2.4 Maintenance . 9
4.3 System component selection . 10
4.3.1 General . 10
4.3.2 URU selection . 10
4.3.3 VCU selection . 10
4.3.4 SMU selection . 10
4.3.5 Additional AUX . 11
4.4 Operational considerations . 11
4.4.1 General . 11
4.4.2 Regulatory requirements . 11
4.4.3 Door unlocking . 11
4.4.4 System management . 12
4.4.5 Intercom controlled building entrances . 12
4.4.6 System integration and interoperability . 12
5 System architecture . 13
6 System installation . 13
6.1 General . 13
6.2 Installation . 14
6.2.1 Equipment . 14
6.2.2 Medium connections . 14
6.2.3 Inspection and functional testing . 15
7 Commissioning and system handover . 15
7.1 Commissioning . 15
7.2 System handover . 16
8 System operation and maintenance . 16
9 Documentation . 17
9.1 General . 17
9.2 Documentation for commissioning/ system handover . 17
9.3 Documentation for maintenance . 18
10 Environmental and EMC considerations . 18
10.1 General . 18

10.2 Environmental considerations . 18
10.2.1 Enclosure protection capability considerations . 18
10.2.2 Anti-vandalism capability considerations . 18
10.3 EMC considerations . 18
Bibliography . 20

Figure 1 – Architecture of a BIS . 13

– 4 – IEC 62820-3-1:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BUILDING INTERCOM SYSTEMS –
Part 3-1: Application guidelines – General

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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indispensable for the correct application of this publication.
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62820-3-1 has been prepared by IEC technical committee 79: Alarm
and electronic security systems.
The text of this International Standard is based on the following documents:
FDIS Report on voting
79/599/FDIS 79/600/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62820 series, published under the general title Building intercom
systems, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 62820-3-1:2017 © IEC 2017
INTRODUCTION
This part 3-1 of the IEC 62820 series of standards provides application guidelines for building
intercom systems. The other parts of this series of standards are as follows:
Part 1-1: System requirements – General
Part 1-2: System requirements – Building intercom systems using the Internet Protocol (IP)
Part 2: Requirements for advanced security building intercom systems (ASBIS)
Part 3-1: Application guidelines – General
Part 3-2: Application guidelines – Advanced security building intercom systems (ASBIS)
This part describes general recommendations for planning, installation, operation, maintenance
and documentation for the application of building intercom systems. The recommendations of
part 3-1 are specifically intended for large-scale systems.
Where an installation is intended to meet the requirements of IEC 62820-2, the
recommendations of IEC 62820-3-2 should also be applied.
The implementation of building intercom systems (BIS) should be in accordance with the
following sequence:
– system planning and design;
– system installation;
– commissioning and system handover;
– system operation and maintenance.
Separate guidance is provided for each activity along with recommendations for documentation
needed. A brief description of each clause covering the activities is provided below:
System planning and design: this clause is intended to assist the designer with the selection
of the type of BIS and system component of the BIS which best meet the BIS implementation and
user requirement.
System installation: this clause is intended to help those responsible for installing BIS by
identifying issues that should be considered prior to start of installation and during the
installation of the system in order to ensure the BIS is implemented correctly as specified during
system planning.
Commissioning and system handover: this clause provides guidance to ensure that the
functions required in the system planning are obtained and that the system owner is provided
with the necessary documentation, records and operating instructions during the handover of
the BIS.
System operation and maintenance: this clause includes the guidelines of the implementation
to ensure the system is operated correctly and maintained adequately.

BUILDING INTERCOM SYSTEMS –
Part 3-1: Application guidelines – General

1 Scope
This part of IEC 62820 series gives guidelines for planning, installation, commissioning,
operation and maintenance of Building Intercom Systems (BIS), for use in security applications.
The different technical requirements for BIS are specified in IEC 62820-1-1 and IEC 62820-1-2.
The objectives of this document are to:
a) provide a framework to assist system integrators, installers, consultant engineers and
system owners in establishing their requirements;
b) assist specifiers and system owners in determining the appropriate equipment required for a
given application.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62820-1-1:2016, Building intercom systems – Part 1-1: System requirements – General
IEC 62820-1-2, Building intercom systems – Part 1-2: System requirements – Building intercom
systems using the Internet Protocol (IP)
IEC 62820-2, Building intercom systems – Part 2: Requirements for advanced security building
intercom systems (ASBIS)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
contact list
list of all connected subscribers
3.1.2
IP system
building intercom systems that use the Internet Protocol (IP)

– 8 – IEC 62820-3-1:2017 © IEC 2017
3.1.3
non-IP system
building intercom systems that do not use the Internet Protocol (IP) as communication
connection and/or have a mixture of IP and non-IP communication connections
3.1.4
qualified person
person who can deal with the allocated work due to his technical training, knowledge and
experience and familiarity with relevant standards, requirements and guidelines
3.1.5
service personnel
persons that are responsible for the maintenance services of a BIS and keep it in good condition
3.1.6
system component
component that can include visitor call unit (VCU), user receiver unit (URU), security
management unit (SMU) or auxiliary device (AUX), which can be chosen by the application of
system type selection
3.1.7
system operator
person who is responsible for the configuration and management services of a BIS and keeps it
running as specified
3.1.8
system owner
person who has an ownership or ownership-type interest in a BIS and is responsible for the
availability and maintenance of a BIS, ensuring that the system and its operation is in
compliance with applicable standards and is dimensioned for the intended use
3.1.9
system type
classification according to architecture, communication and application functions of a system
Note 1 to entry: BIS can be non-IP system or IP system.
3.1.10
user
person who uses URU, VCU or SMU of the BIS to communicate with another
3.2 Abbreviated terms
AUX auxiliary device
BIS building intercom system
EMC electromagnetic compatibility
SMU security management unit
URU user receiver unit
VCU visitor call unit
VSS video surveillance system
4 System planning and design
4.1 General
The objectives of the system planning stage are to determine the extent of BIS and select
system component of the appropriate functionality/performance criteria and environmental
classification and to prepare a system design proposal.
The system design proposal may be subjected to alteration at various stages in the
implementation of the system, e.g. during the installation planning and installation
implementation stages. Any such changes should be agreed between the relevant parties and
the documentation amended accordingly.
Particular care should be taken to minimize inconvenience to the users.
4.2 System type selection
4.2.1 General
According to architecture, communication, application and functions of system, the complexity
of BIS should be considered. Subclauses 4.2.2 to 4.2.4 provide guidance for the system type
selection.
4.2.2 Functional requirement
The following functional requirements should be considered in the system type selection:
– general functions;
– system network topology in installation location and quantity of system components;
– system communication capacity for data transmission in operation;
– other security communication functions;
– integration with other security systems functions.
4.2.3 Performance
The following items should be considered in the system type selection:
– intercom methods (e.g. audio or video intercom system);
– the signal quality of audio or video;
– system scale;
– communication distance;
– communication mode;
– the number of simultaneous communications;
– network structure, structure cabling and extension;
– convenience for installation, configuration and functional testing;
– remote software upgrade capability.
4.2.4 Maintenance
The following items should be considered in system type selection:
– the future availability and replacement for AUX;
– self-check and fault monitoring for device;
– fault monitoring for communication line or AUX;
– system upgrade;
– 10 – IEC 62820-3-1:2017 © IEC 2017
– after-sale service;
– life cycle of product.
4.3 System component selection
4.3.1 General
URU, VCU and SMU should be selected according to the functions of the intercom based on the
system type selection.
All system components should be suitable for the environmental conditions in which they have to
operate.
Care should be taken during the selection of system components to ensure that all the system
components are compatible. If uncertainty arises, the appropriate consultation should take place,
e.g. with the system component manufacturer, supplier, installer or another relevant third party.
4.3.2 URU selection
The following items should be considered:
– intercom methods (e.g. audio or video intercom);
– audio intercom types: handsfree (simultaneous, non-simultaneous conversation [automatic
or manual]), handset or both;
– video types and attributes (e.g. black and white video or colour video, screen size);
– audio attributes (e.g. adjustable volume);
– operating modes (e.g. buttons or touch screen operation);
– additional functions (e.g. video and image recording and replaying function);
– additional functional interfaces (e.g. alarm interface, lift control interface and communication
interface to home and building electronic systems and building automation and control
systems).
4.3.3 VCU selection
The following items should be considered:
– intercom methods (e.g. audio or video intercom);
– video types (e.g. black and white or colour video);
– appropriate lighting and viewing angle of camera;
– audio attributes (e.g. audio levels);
– operating modes (e.g. individual push-buttons, keypad, touch screen);
– calling modes (e.g. push a button, input room number or select from the contact list to call
resident);
– warning function (if the unsecured state of the controlled entrance lasts beyond the
configured time, the VCU send a warning message to SMU);
– enclosure protection capability (according to installation environment requirement to select
the appropriate IP degree);
– anti-vandalism (according to installation environment requirement to select the appropriate
protection degree).
4.3.4 SMU selection
The following items should be considered:
– handsfree / handset / both;
– video display;
– camera option;
– contact list of VCUs, URUs or SMUs;
– call receiving from URU, VCU and SMU;
– VCU call interception (e.g. SMU may intercept incoming calls from a VCU directed to an URU
and then redirect the call to desired URU);
– flexibility to switch between different management modes (e.g. switch the call from one SMU
to another SMU, or SMU intercept calls from VCU to URU);
– special functions (e.g. logging and reporting).
4.3.5 Additional AUX
AUX should be included according to system type. The following devices should be considered
according to the manufacturer’s technical documentation:
– power supplies, including Power over Ethernet (PoE);
– video distributors;
– floor decoders;
– VCU switchers;
– other devices.
4.4 Operational considerations
4.4.1 General
The operational considerations in this section are guidelines for relevant persons (e.g.
designers, installers, operators and maintenance providers) and give installation
recommendations.
The following items should be considered:
– system scale;
– visitor management for intercom and access;
– selection of gate lock and its unlocking method;
– management center establishment (location, device configuration, etc.);
– location of the equipment installation;
– safety requirements (e.g. emergency exits, fire detection, fire alarm);
– environmental and EMC conditions of the site;
– unlocking method in fault conditions;
– the communication routes, the type of communication medium, the maximum communication
distance;
– the availability and reliability of the communication network;
– alarm/alert reporting method;
– training of operators.
4.4.2 Regulatory requirements
Attention should be paid to any applicable international, national and local regulatory
requirements.
4.4.3 Door unlocking
The following unlocking methods can be selected:

– 12 – IEC 62820-3-1:2017 © IEC 2017
– resident user control (including enabling of the auto-unlocking function);
– central administrator control;
– user password;
– proximity card;
– biometric identification;
– mechanical.
NOTE In case of access control systems, IEC 60839 (all parts) are taken into consideration.
4.4.4 System management
To maintain the continued and reliable operation of the BIS, consideration should be given to the
following system management functions:
– system authentication and access control;
– skills and training of system operators;
– management and record of visitor calling;
– management and record of security event;
– management and record of information distribution from management centre to URUs;
– management and maintenance of data backup for system recovery;
– management and maintenance of system devices.
4.4.5 Intercom controlled building entrances
For proper installation and operation of access points of buildings, the following items should be
considered:
– access location and installation of intercom device;
– lock selection and unlocking method to be operated by the intercom device;
– forced entrance or abnormal operation;
– safety requirements (e.g. emergency exits, fire detection/alarm);
– method of returning the building entrance to the closed condition (e.g. automatic door closing
equipment);
– operational indications;
– alternative power source (e.g. battery).
4.4.6 System integration and interoperability
Consideration should be given to the following items when designing a BIS to interoperate or
integrate with other systems (e.g. access control, intruder alarm systems, VSS, home
automation, elevator control):
– interface for a BIS to link with other systems;
– interface for URU to link with other systems;
– communication interface of management centre;
– type of communication links and security of transmitted data associated with those links;
– network infrastructure requirements.

5 System architecture
General
entrance
VCU
In the
Out of
Out of In the
apartment
apartment
building building
Management
centre
Communication AUX Communication
AUX
medium medium
URU
SMU
Floor
Building
Resident
SMU VCU
VCU
Out of
Entrance
Building
apartment
IEC
Figure 1 – Architecture of a BIS
Figure 1 is a topological graph for a BIS that presents the system composition and its
connections, and is suitable for different kinds of intercom system. In general, a BIS may consist
of SMUs, VCUs, AUXs and URUs, and its communication medium includes linking between all
external elements in each building and then linking to resident indoor units. According to
IEC 62820-1-1, IEC 62820-1-2 and IEC 62820-2, system types and scale of BIS, system
components, communication mediums as well as network range can be reduced or extended
suitably in the process of planning and installation. The system components are optional. A BIS
should be configured to have at least two components so as to complete intercom functions.
6 System installation
6.1 General
The system should be installed and configured in accordance with the system design as well as
the manufacturer's provisions. Any deviations from the system design should be documented
and agreed with the system's owner.
Prior to starting work, all relevant safety requirements should be considered. These
requirements are not included in these application guidelines and reference should be made
directly to any relevant national and/or regional standards and legislation that may exist.
Electrical installation methods shall comply with current national and local regulations.
The system component of the BIS should be installed in locations that ensure functional and
adequate security of operation and permit easy access for maintenance and service.

– 14 – IEC 62820-3-1:2017 © IEC 2017
6.2 Installation
6.2.1 Equipment
6.2.1.1 General
The power supply mode, quality and capability of the system power should meet the load of the
system and relevant installation requirement.
The equipment should be installed in accordance with the manufacturer's instructions by a
qualified person. If the installation of a system component in accordance with the manufacturer’s
recommendations is not possible, advice should be requested from the manufacturer.
6.2.1.2 Outdoor installation
Consideration should be given to the environmental protection necessary for equipment
installed at entrances to estates, buildings or houses. Suitable measures should be taken to
protect against rain, snow, hailstones, wind, ice, smoke, sandstorms, lightning, solar radiation,
saline environments, etc. Devices and their installation site should be as follows:
– devices should be selected to be suitable for the application and site, e.g. apartment blocks,
houses or gated communities;
– device position should be safe and secure;
– the installation site should be convenient for connection, operation and maintenance;
– the installation site should avoid sources of high temperature, high voltage, strong
electromagnetic interference, flammable and combustible materials, etc.;
– VCU height over the floor installation should follow local regulations.
6.2.1.3 Indoor installation
Positions of indoor units should be selected with the following considerations:
– installation site of a SMU should be convenient for operation and maintenance such as on a
supervisory desk, or within a device cabinet, etc.;
– an AUX unit can be surface or flush mounted directly to a wall or within a cabinet/ box, and
placed in an equipment room or passageway with safety protection;
– URUs should be installed in a convenient site for connection, operation and maintenance
such as a house passageway, a hallway or a bedroom, which should be near to the cable
inlet port. The height of the bottom margin for URU to ground shall comply with national or
local standards.
6.2.2 Medium connections
Medium connections can be achieved with a cable link or a wireless link.
The cable or wireless link should be compliant with the national/local installation standards.
The selection of the cable route should be short, concealed where possible, safe and reliable.
The cabling should avoid crossing over or running parallel with other system cables and should
not share conduit or cable fastenings. Moreover, cabling should comply with the following:
– Cable routes should be selected to provide the shortest practical distance between the
equipment locations. Care should be taken to ensure adequate fire retardation is provided
where cables are routed through building structures.
– Cable selection should be adapted to system type, system framework as well as cabling
routing, which should be following manufacturer wiring specifications. When multi-wire
cables are used, it is recommended to use wires with different colours to assign a particular
functionality to each wire to avoid conflicts.

– Cable types should be selected to minimize voltage drop and signal loss and comply with
environmental, safety and security specifications. Current carrying capacities should not be
exceeded and, wherever possible, adequate safety margins should be provided.
– Cables connecting parts of the BIS should be adequately protected against tampering when
run through public areas.
– Appropriate protection should be provided where cables are subjected to risk of physical
damage or deliberate interference. If the risk of physical damage exists the cable should be
mechanically protected, e.g. by ducting, trunk or conduit. When these are made of
conductive material, due regard should be paid to their proper electrical grounding.
Power supplies for system components of BIS should be protected from short circuit conditions.
Low voltage and signal cables should not run in close proximity to mains or cables that could
generate electrical interference.
Consideration should be given to the possibility of future expansion of the system and any likely
changes to the building/site.
6.2.3 Inspection and functional testing
An inspection of the system should be carried out on completion of the installation of the BIS to
confirm that it has been installed in accordance with the system design proposal and the
installation plan (if prepared).
A thorough visual inspection should be made to ensure that the work has been carried out in a
satisfactory manner. The intercom type, unlocking methods, materials, and components used
should be tested for functional performance according to the recorded drawings and operating
instructions. Any deviations from the system design proposal should be recorded for inclusion in
the relevant document.
The voltage and polarity of power supply should be checked before powering the BIS.
The BIS should be functionally tested and compared with the requirements included in the
system design proposal as amended by the installation document. A test and inspection report,
which can be used to validate the system installation and operation, should be provided to and
validated by the system owner prior to the start of system commissioning.
7 Commissioning and system handover
7.1 Commissioning
The aim of the commissioning process is to confirm that the installed system meets the
requirements of the system design.
The aspects of the system to be verified during the commissioning procedure should be
documented and agreed between the system owner and other interested parties.
When the system installation is completed, but before handover, a qualified person should
inspect and verify that the system operates correctly, and particularly that:
– the VCU addresses the desired URU or SMU;
– 2-way speech between the VCU, the URU and the SMU is clear and without obvious noise;
– the URU of a system equipped with a video function displays images clearly;
– connections to other systems are operational and messages and signals between systems
are correctly interpreted;
– the relevant documents and instructions have been provided;

– 16 – IEC 62820-3-1:2017 © IEC 2017
– where alternative power source features are provided the system continues to operate
correctly when mains power is disconnected;
– all the required functions are working properly.
The commissioning and verification process can be carried out with a set of representative
samples. In BIS, the selection criteria of the set of representative samples should cover all
SMUs and VCUs as well as some of URUs. The URU sample sets selection should take into
account the following:
– URU sample sets consist of some subsets;
– in general, one subset of URU sample sets is connected with a VCU, in which both the
nearest and the farthest linkage distance URUs are included, and any other one or more
URUs can be selected in the subset.
In the BIS, the above representative sample set for commissioning should take into account the
following:
– the SMU can communicate with all the VCUs for which it has the permission, and is able to
carry out calls, voice communication, unlocking as well as other required functions, e.g.
watch the video from the VCUs;
– the VCU can communicate with each URU of the above URU subset for which it has the
permission, and is able to carry out calls, voice communication, video monitoring, unlocking
as well as other required functions;
– the SMU can communicate with all URUs of the above URU subsets for which has
permission, and is able to carry out calls, voice communication, information distribution as
well as other required functions.
7.2 System handover
The system handover is to formally transfer the responsibility from the design and installation
companies to the system owner. It is recommended that the conditions of the system handover
are clearly defined between these parties.
A demonstration of the BIS should be provided as follow:
– verification that all components are functional;
– operation of any functions specifically requested by the system owner and recorded in the
system design proposal.
Moreover, the following aspects should be taken into account:
– documentation (see Clause 9);
– training in system management and operation.
After completion of the system handover, the BIS should be tested for a period of time to be
agreed with the system owner. During this period, the BIS should be operated normally.
After successful completion of the test period, the system owner should be asked to sign an
acceptance certificate to state the BIS has been installed and operating in accordance with the
installation documentation, instruction and training have been provided to ensure the proper
operation of the BIS.
8 System operation and maintenance
Operation and management of the BIS are the responsibility of the system owner or the manager
appointed by the system owner. Management responsibility is to ensure that:
– training is provided to users and operators;

– instructions are provided for users and operators;
– system administration and data back-up for system recovery procedures are provided;
– response procedures for resident call and alert are adequate;
– regular maintenance of the system;
– applicable national regulatory requirements are fulfilled.
To ensure the BIS is working correctly, it should be inspected and serviced at agreed intervals.
The arrangements for maintenance should be made before the BIS is put into operation.
A maintenance service agreement should be made with a qualified organization for inspection
and servicing. Maintenance should only be carried out by persons properly trained and
competent in the activities required for inspection and servicing of the system. The maintenance
service agreement should describe the frequency of planned inspections/maintenance visits.
Different types of maintenance arrangements may be used, for example:
– inspection routine: action limited to a diagnostic check of the system;
– servicing routine: inspection routine followed by the repair or replacement of malfunctioning
parts of the system.
In all cases service personnel should notify the system operator and get clearance to proceed
with the maintenance work. It is necessary to ensure that at the end of the maintenance work the
full operation of the BIS is restored.
Inspection and servicing routine(s) should be provided and documented by the manufacturer or
the installer of system component. Inspection and service should be performed according to
these routin
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