| 2 | ||
| 2.5G |
Extension of GSM cellular radio by the data services GPRS and EDGE |
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| 2G |
Cellular radio system of the second generation (GSM) offering the services voice, SMS and direct data communication (CSD) |
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| 3 | ||
| 3G |
Cellular radio system of the third generation offering higher data rates (UMTS, HSDPA, HSUPA) |
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| 8 | ||
| 802.11 |
IEEE 802.11 Group of IEEE (Institute of Electrical and Electronics Engineers) standards for wireless local area networks (WLAN) |
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| A | ||
| Access Point |
Device in a WLAN connecting between wireless stations and towards the wired network |
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| APN |
Access Point Name Name of the registration service for data communication in cellular networks; controls access rights and assignes IP addresses |
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| AT Command |
Originally a command language in text form by Hayes for analogue modems. Uniform standard commands for basic functions, extended for additional functions and modem-like devices (e.g. all INSYS devices with a serial interface). Each command starts with AT, an abbreviation for attention. |
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| B | ||
| Bluetooth |
Radio standard in the 2.4 GHz band - for industrial use, especially serial cable substitute in the close-up range up to 100 m
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| bps |
Bits per second Unit of the transmission rate in bits per second; also bit/s. |
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| Bridge |
Network device for connecting two media to a network segmentt
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| C | ||
| COM Server |
Serial Ethernet converter or serial Ethernet gateway converts serial data into data packets for transmission via Ethernet
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| CSD |
Circuit Switched Data Data service within the GSM network, wired transmission towards GSM devices, ISDN-TAs and modems. Data rates usually 9,600 bps. Billing usually based on connect time (like telephone calls).
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| CTS |
Clear to send RS232 control line for handshake |
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| D | ||
| Data bit |
RS232: Number of user data in bits per data word |
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| DCD |
Data carrier detect RS232 control line for connection status |
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| DCE |
Data Communication Equipment Connection of serial communication at communication device (e.g. modem) |
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| Dial-In / Dial-Out |
Incoming and outgoing data communication as seen from a router: Dial-In means that the router may accept a modem connection via which to transmit TCP/IP data traffic. |
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| DIN rail |
Also: DIN top hat rail: standard mounting rail (35mm) for control cabinets |
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| DSR |
Data set ready RS232 control line for device stand-by |
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| DTE |
Data Terminal Equipment Connection of serial communication to PC or PLC |
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| DTR |
Data terminal ready RS232 control line for device stand-by |
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| E | ||
| E-GPRS |
Enhanced GPRS Synonym for EDGE |
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| EDGE |
Enhanced Data Service for GSM Evolution Cellular data service of the interim generation 2.5G. Packet-based communication based on TCP/IP and UDP/IP. Billing usually based on data volume. Data rates theoretically up to 384 kbps, in real life up to 200 kbps.
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| Ethernet |
Wired local network according to IEEE 802.3 |
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| F | ||
| Firewall |
Network device or function for selective forwarding of data, e.g. based on IP addresses, ports or protocols |
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| G | ||
| GPRS |
General Packet Radio Service Cellular data service of the interim generation 2.5G. Packet-oriented communication based on TCP/IP and UDP/IP. Billing usually based on data volume. Data rates theoretically up to 171 kbps, in real life up to 85 kbps. Worldwide network coverage.
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| GSM |
Global System for Mobile Communications Cellular system of the second generation with the services voice, SMS and direct data communications (CSD, GPRS, EDGE)
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| H | ||
| HAN |
Home Area Network Concept for wireless and wire-bound networks. Initially defined as network for communication and load control in smart grids and for energy metering data transmission with smart metering. Later extended by the building management system and consumer electronics fields. More about data communication in building automation, Smart Home and energy efficiency. |
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| HSDPA |
High Speed Downlink Packet Access Data service within the UMTS network with accelerated download with rates up to several Mbps. |
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| HSUPA |
High Speed Uplink Packet Access Data service within the UMTS network with accelerated upload. |
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| HVAC |
Heating, Ventilation and Air Conditioning These systems are part of the building equipment. Energy conserving HVAC technology becomes more and more important with increasing environmental awareness and conditions. Modern systems have less pollutant emission and lower operating costs with less energy consumption. Keywords are heat recovery, cold recovery, moisture recovery and night cooling. More about data communication in building automation, Smart Home and energy efficiency. |
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| I | ||
| IP |
Internet Protocol Transmission protocol for internet and office communication. |
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| IPsec |
Internet Protocol Security Security architecture for internet protocols, e.g. as a basis for VPNs.
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| ISDN |
Integrated Services Digital Network Digital telephone and data network
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| ITS |
Intelligent Transport Systems Transport telematics designates the acquisition, transmission and processing of traffic-related data to organise and manage the traffic on land, on water and in the air and inform drivers. |
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| K | ||
| kbps |
Kilobit per second Indication of transmission rate in units of 1,024 bits per second each |
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| L | ||
| LAN |
Local area network Local network, usually based on Ethernet and IP |
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| LAN modem |
Alternative name for serial Ethernet adapters, e.g. i-module Ethernet, Socket Ethernet, INSYS Ethernet |
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| M | ||
| M-Bus |
Metering bus Standardised field bus for remote readout of smart meters (gas, water, electricity and heat, etc.). Two-wire master/slave bus concept for wired systems or as wireless M-Bus. |
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| Mbps |
Megabits per second Indication of transmission rate in units of megabits per second |
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| MID |
Measuring Instruments Directive European Directive 2004/22/EC measuring instruments. Effective from 30.10.2006. Describes the harmonised requirements for various kinds of measuring instruments. Applies to water meters, gas meters, electricity meters, amongst others. PDF |
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| Modem |
Modulator-Demodulator Communication device for data transmission via analogue channels, especially the analogue telephone network.
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| O | ||
| OpenVPN |
Platform-independent VPN solution with a high degree of security |
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| P | ||
| Parity |
RS232: Control bit for data integrity |
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| PLC |
Powerline Communications Powerline is the generic term for data transmission via power lines. The conducting wires are used here to transmit data in parallel with power supply. Powerline Communications (PLC) is also known under the term Digital Powerline (DPL). More about Powerline devices of INSYS icom. |
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| PSTN |
Public switched telephone network Worldwide public analogue telephone network |
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| R | ||
| Router |
Network device for switching between two independent segments, e.g. between a LAN and the Internet.
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| RS232 |
Serial interface for data transmission, widespread as connection between control systems, measuring devices and modems |
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| RTS |
Request to send RS232 control line for handshake |
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| S | ||
| SMS |
Short message service Service for short text messages up to 160 characters within the GSM network. Transmission is done offline via a central server. |
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| Start bit |
RS232: Number of leading bits preceding a data word |
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| Stop bit |
RS232: Number of bits following a data word |
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| Switch |
Network device for wiring and distribution within the Ethernet |
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| T | ||
| TCP/IP |
Transmission control protocol Protected protocol for IP data transmission |
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| U | ||
| UDP/IP |
User datagram protocol Unprotected protocol for IP data transmission |
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| UMTS |
Universal Mobile Telecommunications System Cellular system of the third generation with data rates up to 384 kbps. Packet-based communication based on TCP/IP and UDP/IP. Billing usually based on data volume. Networks developed in highly populated areas, substitute access in scarcely populated areas via GPRS and EDGE. |
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| V | ||
| VCom |
Virtual COM port Software driver as remote station for serial terminal devices connected via IP-based networks, e.g. i-module GPRS serial, INSYS GPRS serial, i-module WLAN serial, INSYS WLAN serial, i-module Ethernet, INSYS Ethernet. |
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| VMO |
Virtual mobile operator A Virtual Mobile Operator (VMO) is a mobile phone service provider without an own mobile phone network. He rents the exclusive rights to use a portion of the network capacity of another company (infrastructure provider). The VMO offers his customers to use this capacity for closed user groups for example against payment. This business model is not new, but quick technological developments of the broadcasting technique and markets push on the change in the telecommunications business. The advantage of this business model is the avoidance of the time and cost consuming installation of own competitive structures as well as the reduction of operative risks by involving a competent service provider. An example for an infrastructure provider is the Deutsche Telekom with its GPRS network. The VMO IC3S forms a closed user group of GPRS devices and protected external access possibilities via the internet per customer with his product mdex fixed.IP as a service provider. The devices identify themselves during login and get always the same IP addresses. The alternative routing rules enable a free communication establishment among each other: mobile server, connections between mobile devices and polling from the master control are possible without restrictions. The restrictive security rules as in the general GPRS network still apply for devices, which do not belong to the own user group. Another advantage of the closed user group is the waiving of additional protocols, because this service takes place within the TCP/IP standard, so that no terminal devices must be adapted. |
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| VPN |
Virtual private network Logical sub-network for protected data transport via a public data network; realised for example through the highly secure OpenVPN. |
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| W | ||
| WLAN |
Wireless local area network Wireless extension of LAN according to IEEE 802.11
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