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INDUSTRONIC Glossary
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A+B System (shared operation)
For this redundancy concept two inpedendent systems work simultaneously (System A & System B) which are
synchronized and connected via redundant cable routes. Often they are located in different places so that not both
systems are affected in case of an emergency.
This redundancy concept provides the highest protection in case of failure. It is a typical concept for
onshore/offshore applications.
Find further information in our brochure on redundancy concepts.
A+B System (shared operation)
Acoustic Feedback
The sound received by a microphone is picked up by a nearby speaker and makes it back into the microphone. This
leads to an unpleasant howling sound.
Acoustic feedback can be avoided by using special microphones and/or speakers with non-uniform directivity. Their
correct alignment is also important.
Synonym: Larsen effect
Address Resolution Protocol (ARP)
ARP is a communication protocol which is used for finding the corresponding physical MAC address of a given IP
address.
Agent
Is a software which runs on each network device. A Network Management System (NMS) has access to the network
devices via the Agent to retrieve or to set data.
All Call
Announcement to all subscribers
Functional Data Sheet
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Backup Amplifier
Additional amplifier which is automatically activated when the standard amplifier fails.
A backup amplifier can be used for several amplifiers. However, it can only replace one amplifier at a time.
Call Group
A call group consists of several intercom stations which can be collectively addressed. Then, you can directly
answer from one of the intercom stations.
Call Group Listening Restriction
Outgoing calls from a member of a call group cannot be listened-in by other members of this call group.
Call Signaling
An incoming connection request is visually and/or acoustically indicated on the terminal device.
Call Storage
When you are absent, an incoming call is stored for a later callback and is visually/acoustically indicated.
After the call has been answered or after a pre-defined time has elapsed, the request is deleted.
Call Storage Signaling
If an incoming call cannot be answered, it is stored for a later callback and it is also visually indicated on the relevant
key or via flashing warning beacon.
This signaling type is indicated with a blinking frequency of 100:900 (100 ms on / 900 ms off) at the LED.
CAN
The Controller Area Network (CAN) is a serial bus system and connects several network components that are equal
using a 2-wire bus line. Data flow is controlled via a bus protocol based on CAN.
CANopen
CANopen is a open communication protocol based on CAN.
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Check Box Table
A table listing all voice connections and functions of an INDUSTRONIC system using check boxes. It is used as an
alternative to the Intercom Connection Diagram or the Intercom Connection Table.
For a project, INDUSTRONIC uses this Check Box Table, the Intercom Connection Table, or the Intercom
Connection Diagram.
Example of a Check Box Table
Connection
Established link between terminal devices to exchange messages or speech.
Control Line
Analog connecting line between signal transmitter and control terminal equipment to read in / to output or to transmit
control signals.
A control line is bidirectional. This means that signals can be transmitted in both directions, but not at the same time.
Depending on the functional context, the control line can be used as input or output.
Control Room
A central place equipped with all devices necessary for the control, monitoring, and support of business processes
and for fast elimination of occurring failures.
In a control room, you may find one or several master intercom stations of Intercom and PA/GA systems. These
systems are connected to the control room via different interfaces (e.g.: Modbus, SIP, CANopen).
Conversation Break Reservation
A two-way connection remains busy during conversation breaks.
Connections with higher priority can however interrupt busy conversation breaks.
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Dial Keypad
Numeric keypad, which consists of 12 to 16 dial keys, depending on the type. Ten of them are numeric keys (0-9)
and two of them are function keys (* and #). The arrangement of the keys depends on the respective intercom
station type and the configuration.
Key arrangement of a DTM xxx digital intercom station
Duplex
An operating mode where information can be transmitted in both directions simultaneously between two points
(sending and receiving). Often referred to as "full duplex".
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Duplex Connection
A duplex connection (also: full duplex connection) provides communication in both directions (bidirectional) where
both subscribers can speak and listen simultaneously.
INDUSTRONIC distinguishes between:
Duplex Connection with Automatic Call Acceptance
Duplex Connection with Semi-automatic Call Acceptance
Duplex Connection with Manual Call Acceptance
Duplex Connection with Automatic Call Acceptance
For a duplex connection with automatic call acceptance, a connection request is automatically established if the line
is free. Both subscribers can immediately communicate with each other in duplex mode (they can speak and listen
simultaneously).
Duplex Connection with Manual Call Acceptance
For a duplex connection with manual call acceptance, a connection request is not automatically established if the
line is free. The calling subscriber cannot speak immediately. The called subscriber must press the relevant key first
to accept the call. Then, both subscribers can communicate with each other in duplex mode (they can speak and
listen simultaneously).
Duplex Connection with Semi-automatic Call Acceptance
For a duplex connection with semi-automatic call acceptance, a connection request is not automatically established
if the line is free. The calling subscriber can speak immediately. The called subscriber must press a key first to
answer the call. Then, both subscribers can communicate with each other in duplex mode (they can speak and
listen simultaneously).
Duplex Signaling
An established duplex connection (both subscribers can speak and listen simultaneously) is visually indicated on the
terminal device.
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Duplicated Control System (hot stand-by operation)
For this redundancy concept two inpedendent "control units" are provided which are equipped with the same control
components. One control unit is active (Main Unit) and the other (Secondary Unit) is in hot stand-by mode. In case
of failure, there is an automatic switchover to the backup control unit.
This redundancy concepts ensures that there is no loss of any warning and alarm functions in case of failure.
Find further information in our brochure on redundancy concepts.
Duplicated Control System (hot stand-by operation)
Dynamic Group Call
Call to a freely selectable group of subscribers
Functional Data Sheet
Dynamic Host Configuration Protocol (DHCP)
DHCP is a communication protocol used on IP networks for the dynamic assignment of IP addresses and the
central management of network configuration parameters.
Emergency Microphone
Microphone which is part of the voice alarm system and is used by safety staff (e.g. firemen) or other staff
responsible. For INDUSTRONIC, it can be implemented as intercom station with monitored microphone.
Event Group
Group of events of which at least one event must occur to trigger an action.
Events are detected by INDUSTRONIC systems as input conditions to trigger a certain action (e.g. activate a
speaker or a flashing warning beacon). An event can also occur within the system (e.g. intercom station or line card
failure).
File Transfer Protocol (FTP)
Protocol to transit data (upload and download) between server and client via TCP/IP networks.
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Full Duplex
see Duplex
Gateway
A gateway connects two networks that use different communication protocols. It transfers messages from one
network to the other acting as protocol converter.
Group Call
Call to a certain pre-defined group of subscribers
Functional Data Sheet
Half Duplex
An operating mode where information can be transmitted in both directions alternately between two points, but not
simultaneously (sending and receiving).
Half Duplex Connection
see Two-way Connection
Hot Stand-by Mode
For this operating mode a component or equipment is in stand-by mode. The component or the equipment is
powered and ready for immediate service. In other words if the main component fails, there is an automatic
switchover to this backup component which takes over completely after a short timeout.
INDUSTRONIC offers to implement hot stand-by components in its redundancy concepts.
Hypertext Transfer Protocol (HTTP)
Internet protocol to transmit web pages betweeen server and client (web browser) based on the request-response
principle.
Intercom Connection
see Two-way Connection
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Intercom Connection Diagram
Visual representation of all voice connections and functions of an INDUSTRONIC system (e.g. group calls, all calls;
warnings, etc.) created as an alternative to the Intercom Connection Table or the Check Box Table.
For a project, INDUSTRONIC uses this Intercom Connection Diagram, the Intercom Connection Table or the Check
Box Table.
Example of an Intercom Connection Diagram
Intercom Connection Program
File containing customer-specific parameters (configuration) to be uploaded to the exchange control board. This file
contains all configured voice connections and functions of an INDUSTRONIC system.
Example of an Intercom Connection Program
Intercom Connection Table
A table listing all voice connections and functions of an INDUSTRONIC system. It is used as an alternative to the
Intercom Connection Diagram or the Check Box Table.
For a project, INDUSTRONIC uses this Intercom Connection Table, the Intercom Connection Diagram, or the Check
Box Table.
Example of an Intercom Connection Table
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Internet Protocol (IP)
A connectionless network protocol at layer 3 of the OSI model that is primarily responsible for addressing of hosts
and routing of data packets.
LAN
A local area network to transmit data between several network terminal devices within a limited area (e.g. a
building).
Larsen Effect
see Acoustic Feedback
Listening In
Clearly perceptible participation or agreed recording of a conversation between two parties by a third party.
Managed Objects
Are objects organized in a Management Information Base (MIB) and analyzed by the Network Management System
(NMS).
Management Information Base (MIB)
A standardized database which contains any information on the objects (Managed Objects) connected to a network
and on the functions. Information can be retrieved and changed via a Network Management System (NMS) using
SNMP.
Object Identifiers (OIDs) are used to access the individual objects.
Besides the standardized SNMP MIB, every manufacturer can define a private MIB for each of its products. This
way, each type of network component has its own MIB.
Master Intercom Station
A master intercom station or also called master control station is typically used in a control room and can have
additional and more comprehensive control and alarm functions compared to a standard intercom station.
Modbus
Modbus is a protocol for field bus systems using the Master/Slave principle and depending on the system design
provide different types of transmission modes: Modbus ASCI, Modbus RTU, and Modbus TCP.
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Momentary Rocker Switch
The momentary rocker switch is a user control of the outdoor intercom station and explosion-proof intercom station
from INDUSTRONIC.
It returns to its normal position when actuated and released. To trigger a function, one side of the momentary rocker
switch is moved down. You can trigger one function per side (e.g. Two-way connection, alarm triggering, etc.).
Old INDUSTRONIC term: twin key
The right side of the momentary rocker switch has been moved down. The illuminated LED indicates that the function configured on this side is triggered.
Momentary Switch
The momentary switch is a user control which is used for different intercom stations from INDUSTRONIC (e.g. for
the crane intercom station or the DT 003 digital desktop intercom station).
Like the momentary rocker switch it returns to its normal position when actuated and released. To trigger a function,
the momentary switch is moved down. You can trigger one function per momentary switch (e.g. alarm).
The 10 NRC 001 IP compact intercom station equipped with a key module providing 10 momentary switches
Network Management System (NMS)
Is a software to control and monitor network components.
Object Identifier
In order to clearly identify the objects in the Management Information Base (MIB), individual data is converted into
numbers, the so-called Object Identifiers (OIDs).
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OSI Reference Model
The OSI reference model, developed by the International Standards Organization (ISO), divides communication
processes into several layers and describes their tasks.
The idea behind this model is to provide manufacturer-independent communication between different systems and
devices.
PA Connection
Announcements to stations, speaker zones, group calls, etc. without talking back
Packet Loss Rate
This value, measured in percentage, describes the extent of missing and/or damaged data packets during
transmission. (This can have a negative effect on real-time services such as VoIP resulting in reduced speech
quality).
Partly-busy Signaling
A partly-busy connection is visually indicated on the terminal device. A connection is partly busy if not all members
of a group are available.
Pre-announcement Tone
Short acoustic signal prior to an announcement
Effect: Listeners focus on the announcement and suspend conversations and noisy activities.
Pre-announcement Tone Monitoring
A pre-announcement tone is also output on the triggering intercom station.
Pre-busy Signaling
This signaling type is used to visually indicate the availability of an intercom station at all intercom stations which
have a direct dial key to this intercom station before placing the call. If no direct dial key is available, there is no
indication.
A busy intercom station is indicated with continuous light at the LED.
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Priority Override Busy Signaling
It is visually indicated at your intercom station if you can override a busy connection. Only a subscriber with a higher
priority can interrupt an existing connection.
You can override a busy connection when the LED on your intercom station blinks with a frequency of 900:100 (900
ms on / 100 ms off).
Quality of Service (QoS)
QoS refers to different quality characteristics (latency, jitter, packet loss rate, availability, throughput, etc.) which are
evaluated to be able to determine if the agreed data flow of a service is satisfactory for the user.
QoS can be achieved by prioritizing data traffic. For more information, refer to the IEEE 802.1p standard.
Ready-to-listen Signaling
During an established connection, it is visually indicated on the terminal device that you are ready to listen to the
other subscriber who wants to speak to you. As soon as the ready-to-listen signaling goes off, you can directly
answer by pressing the relevant key.
This signaling type is indicated with a blinking frequency of 250:250 (250 ms on / 250 ms off) at the LED.
Ready-to-talk Signaling
For an established connection, it is visually indicated at the terminal device that you can speak to one or more
subscribers.
This signaling type is indicated with continuous light at the LED.
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Real Time Transport Protocol (RTP)
The Real Time Transport Protocol is used to transmit audiovisual data (streams). Concerning VoIP, voice data is
sent between different terminal devices via the RTP protocol.
Redundancy 1+1
For this redundancy concept one active component (1) is backed by exactly one backup component (+1) in hot
stand-by mode. As soon as an active component fails, the corresponding backup component takes over the
complete functions of the defective component. This way several failures are compensated as each component is
backed by its corresponding backup component.
Redundancy N+1
For this redundancy concept one or several active components (N) are backed by exactly one backup component
(+1) in hot stand-by mode. As soon as an active component fails, the backup component takes over the complete
functions of the defective component. The failure of a second active component which is backed by exactly the
same backup component is not compensated.
Router
Connecting device which connects individual network terminal devices across different networks and controls data
transmission between them.
A router controls data transmission by analyzing incoming data packets, defining the fastest way for them to their
target and forwards or blocks them.
SCADA
A computer system for gathering and analyzing real-time data from different locations in order to control, monitor
and optimize processes in industrial plants.
The term SCADA stands for Supervisory Control And Data Acquisition.
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Service Mode
Operating mode in which functions or features of an INDUSTRONIC system can be tested without performing the
corresponding action.
Session Initiation Protocol (SIP)
The Session Initiation Protocol is a network protocol mainly used to control telephone connections in IP networks.
Simple Network Management Protocol (SNMP)
Network management protocol used to centrally monitor and control different network components.
Simplex
An operating mode in which information can be transmitted only in one direction, between two points.
Single System with N+1 Components
For this redundancy concept one single system is provided. There is the option to protect important components by
exactly one backup component in hot stand-by mode (N+1 Redundancy).
This redundancy concept is primarily used to protect individual components from failures caused by age or wear.
Find further information in our brochure on redundancy concepts.
Single System with N+1 Components
SIP Trunk
A trunk is a set of several (voice) channels. For a SIP trunk, several RTP voice channels can be connected via SIP
registration.
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SNMP Data Packets
The Network Management System (NMS) communicates with the individual Agents which run on the individual
network components by sending data packets.
There are the following 6 data packets:
GetRequest: Request of a data packet
GetNextRequest: Retrieving the subsequent data packet
GetBulk: Retrieving several data packets
SetRequest: Instruction to the Agent to change the value of a certain data packet
GetResponse: Responding to a previous data packet
Trap: Message sent to the Network Management System by an Agent to inform about an event
SNMP Data Packets
Speaker Circuit
Circuit to which one or more speakers are connected. Often referred to as speaker line.
Overview on speaker zone, speaker circuit, and speaker line
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Speaker Zone
Smallest addressable unit for which a common acoustic signal is provided. Physically, the speaker zone can consist
of one or several speaker circuits (also called speaker lines).
Overview on speaker zone, speaker circuit, and speaker line
Store & Forward
Voice is recorded to a digital audio processor (DAP) first, stored and then forwarded to one or several targets with a
time delay.
Switch
Connecting device which connects individual network terminal devices in a network and controls data transmission
between them.
A switch identifies the desired target and sends the incoming data only to this address. This way individual network
terminal devices within a network can communicate with each other without the risk of collisions.
System
An INDUSTRONIC system consists of exactly one exchange control board as well as any other INDUSTRONIC
equipment (e.g. line cards, intercom stations, amplifiers, loudspeakers), which are combined for a communication
solution tailored to customer requirements.
System Network
A system network consists of at least 2 systems which are connected via interfaces. From an external point of view,
it can be seen as one single unit.
All INDUSTRONIC systems within the network of systems have the same configuration. Other features are:
Any function can be used across any system
Global, unique priorities (priority of system A also applies for system B)
Global, unique call numbers
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TCP/IP
TCP/IP are two independent network protocols which operate at different layers of the OSI model.
As they are often used together for data transmission via LAN or on the Internet, you often speak of TCP/IP network
connections when referring to data transmission in a network. IP is responsible for the addressing of data packets
and TCP for the transport of them.
Transmission Control Protocol (TCP)
A connection-oriented network protocol at layer 4 of the OSI model that is primarily used together with the Internet
Protocol.
As transport protocol, TCP provides a secure connection between two network nodes. Among other tasks, it
ensures that the data packets are delivered to the target node without damage and in the correct order.
Two-way Connection
A two-way connection (also: half-duplex connection, intercom connection) provides communication in both
directions (bidirectional) where both subscribers can speak and listen alternately, but not simultaneously.
VLAN
A virtual local area network is a closed private network within a larger network where several terminal devices are
grouped by logical addresses (VLAN IDs). These devices don't have to be physically connected. They often belong
to different LAN segments.
Switches are used to connect individual terminal devices within a virtual network. Routers are used to connect
several VLANs. Here, it is necessary that both connecting devices support VLAN.
Voice Connection
Established connection between remote subscribers that can be used for acoustic communication.
Voice over IP (VoIP)
Technology to transmit voice data using the Internet Protocol (IP).
Volume Control Group
A volume control group consists of several terminal devices for which the volume level can be centrally raised and
lowered.
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WAN
A wide area network to transmit data between several network terminal devices across a wide geographical area
(e.g. across cities).
WLAN
A wireless local area network to transmit data between several network terminal devices within a limited area (e.g. a
building) via radio.
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INDUSTRONIC©
Industrie-Electronic GmbH & Co. KG
Carl-Jacob-Kolb-Weg 1
97877 Wertheim / Germany
Tel.: +49 9342 871-0
Fax: +49 9342 871-565
[email protected]
www.industronic.com
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