| IANA |
Internet Assigned Number Authority |
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| iDEN |
Integrated Digital Enhanced Network.
Wireless system from Motorola that integrates voice, data, short messages and dispatch
radio. Used by Nextel and others. |
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| i-Mode |
Packet based information service for mobile
phones from NTT DoCoMo (Japan). First to provide Web browsing from cellphones. |
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| IMSI |
International Mobile Subscriber Identity |
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| IMT 2000 |
3G wireless from the ITU. International
Mobile Telecommunications 2000 also known as the Third generation mobile systems |
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| IN |
Intelligent Network. The public switched
telephone network architecture of the 1990s, which was developed by Bellcore (now
Telcordia) and the ITU. It was created to provide a variety of advanced telephony services
such as 800 number translation, local number portability (LNP), call forwarding, call
screening and wireless integration. While Bellcore named its version AIN (Advanced
Intelligent Network) for use in North America, there are a variety of proprietary versions
throughout the world based on the ITU standard.
The IN uses the SS7 signaling protocol in which voice calls (or modem data) travels
through circuit-switched voice switches, while control signals travel over an SS7
packet-switched network. |
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| INAP |
Intelligent Network Application Part. An IN
(Intelligent Network) protocol used in a European SS7 network that is used to query
databases for a variety of functions not related to call setup and tear down. INAP uses
the ASN.1 standard for defining message content. |
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| INCM |
Intelligent Network Conceptual Model |
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| INDB |
Intelligent Network Data Base |
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| INDBMS |
IN Data Base Management System |
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| INFA |
Intelligent Network Functional Architecture |
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| IP |
Internet Protocol. The IP part of the
TCP/IP communications protocol. IP implements the network layer (layer 3) of the protocol,
which contains a network address and is used to route a message to a different network or
subnetwork. IP accepts "packets" from the layer 4 transport protocol (TCP or
UDP), adds its own header to it and delivers a "datagram" to the layer 2 data
link protocol. It may also break the packet into fragments to support the maximum
transmission unit (MTU) of the network. |
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| IP address |
Internet Protocol address. The address of a
computer attached to a TCP/IP network. Every client and server station must have a unique
IP address. Client workstations have either a permanent address or one that is dynamically
assigned to them each dial-up session. IP addresses are written as four sets of numbers
separated by periods; for example, 204.171.64.2.
The TCP/IP packet uses 32 bits to contain the IP address, which is made up of a network
and host address (netid and hostid). |
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| IrDA |
Infrared Data Association, Walnut Creek,
CA. A membership organization founded in 1993 and dedicated to developing standards for
wireless, infrared transmission systems between computers. With IrDA ports, a laptop or
PDA can exchange data with a desktop computer or use a printer without a cable connection.
IrDA requires line-of-sight transmission like a TV remote control. IrDA products began to
appear in 1995. The LaserJet 5P was one of the first printers with a built-in IrDA port.
IrDA is comprised of the IrDA Serial IR physical layer (IrDA-SIR), which provides a
half-duplex connection of up to 115.2 Kbps. This speed allows the use of a low-cost UART
chip; however, higher non-UART extensions for 1.15 and 4 Mbps have also been defined. IrDA
uses the Infrared Link Access Protocol (IrLAP), an adaptation of HDLC, as its data link
protocol. The Infrared Link Management Protocol (IrLMP) is also used to provide a
mechanism for handshaking and multiplexing of two or more different data streams
simultaneously. |
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| IrDA port |
A transmitter/receiver for infrared signals |
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| Iridium |
First LEO based global communications
system backed by Motorola. Primarily for voice, it was launched in 1998 and went into
Chapter 11 in 1999. |
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| IS-136 |
Second generation TDMA in 1994. Also called
"Digital AMPS" or "D AMPS." |
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| IS-54 |
First generation TDMA in 1991. |
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| IS-95 |
First generation CDMA (cdmaONE). |
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| ISCTX |
Integrated Services CenTreX |
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| ISDN |
Integrated Services Digital Network |
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| ISM band |
Industrial, Scientific and Medical band.
Unlicensed spectrum typically in the 900MHz, 2.4GHz and 5.7GHz bands. Requires spread
spectrum techniques at 1 watt. |
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| ISPBX |
Integrated Services Private Branch eXchange |
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| ISUP |
ISDN Signaling User Part (signaling) |
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| ITU |
International Telecommunications Union |
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| IVR |
Interactive Voice Response |
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| IWU |
Interworking Unit |
