Terminal adapter

terminal adaptors
A terminal adapter or TA is a device that connects a terminal device – a computer, a mobile communications device, or other – to a communications network.wikipedia
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Integrated Services Digital Network

ISDN ISDNISDN30
In ISDN terminology, the terminal adapter connects a terminal (computer) to the ISDN network.
The T interface is a serial interface between a computing device and a terminal adapter, which is the digital equivalent of a modem.

Modem

modemsdial-up modem56k modem
The TA therefore fulfills a similar function to the ones a modem has on the POTS network, and is therefore sometimes called an ISDN modem.

Plain old telephone service

POTSLocal Telephone Servicetelephone
The TA therefore fulfills a similar function to the ones a modem has on the POTS network, and is therefore sometimes called an ISDN modem.

Modulation

modulatedmodulatordigital modulation
The latter term, however, is partially misleading as there is no modulation or demodulation performed.

Demodulation

demodulatordemodulatedemodulates
The latter term, however, is partially misleading as there is no modulation or demodulation performed.

Codec

codecsdecoderdecoders
In addition, a TA may contain an interface and codec for one or more analog telephone lines (aka a/b line), allowing an existing POTS installation to be upgraded to ISDN without changing phones.

Basic Rate Interface

BRI2B1DBasic Rate (BRI)
Terminal adapters typically connect to a basic rate interface (S0, sometimes also U0).

S interface

SS 0 -busS0
Terminal adapters typically connect to a basic rate interface (S0, sometimes also U0).

U interface

UU k0 U K0 -Interface
Terminal adapters typically connect to a basic rate interface (S0, sometimes also U0).

RS-232

serialserial portRS232
On the terminal side, the most popular interfaces are RS-232 serial and USB; others like V.35 or RS-449 are only of historical interest.

USB

USB 2.0micro-USBmicro USB
On the terminal side, the most popular interfaces are RS-232 serial and USB; others like V.35 or RS-449 are only of historical interest.

RS-449

On the terminal side, the most popular interfaces are RS-232 serial and USB; others like V.35 or RS-449 are only of historical interest.

Ethernet

wiredJabbernetworking
Devices connecting ISDN to a network (e.g. Ethernet) commonly include routing functionality; while they technically include a TA function, they are referred to as (ISDN) routers.

Router (computing)

routerroutersnetwork router
Devices connecting ISDN to a network (e.g. Ethernet) commonly include routing functionality; while they technically include a TA function, they are referred to as (ISDN) routers.

Cellular network

cellularmobile networkcellular networks
In mobile networks, the terminal adapter is used by the terminal equipment to access the mobile termination, using AT commands (see Hayes command set).

Terminal equipment

terminus
In mobile networks, the terminal adapter is used by the terminal equipment to access the mobile termination, using AT commands (see Hayes command set).

Hayes command set

Hayes+++ (modem)AT commands
In mobile networks, the terminal adapter is used by the terminal equipment to access the mobile termination, using AT commands (see Hayes command set).

2G

2.5G2.75G2.5
In 2G (such as GSM or CDMA), the terminal adapter is a theoretically optional while in 3G (such as W-CDMA), the terminal adapter is mandatory and is part of the mobile termination.

GSM

GSM (850/900/1800/1900) GSM/GPRS/EDGEGSM technology
In 2G (such as GSM or CDMA), the terminal adapter is a theoretically optional while in 3G (such as W-CDMA), the terminal adapter is mandatory and is part of the mobile termination.

Code-division multiple access

CDMAcode division multiple accessCDMA-450
In 2G (such as GSM or CDMA), the terminal adapter is a theoretically optional while in 3G (such as W-CDMA), the terminal adapter is mandatory and is part of the mobile termination.

3G

3G networkIMTthird generation
In 2G (such as GSM or CDMA), the terminal adapter is a theoretically optional while in 3G (such as W-CDMA), the terminal adapter is mandatory and is part of the mobile termination.

UMTS

WCDMA3GUniversal Mobile Telecommunications System
In 2G (such as GSM or CDMA), the terminal adapter is a theoretically optional while in 3G (such as W-CDMA), the terminal adapter is mandatory and is part of the mobile termination.

Automation

automatedindustrial automationautomatic control
In the automation industry, a terminal adapter is a passive device that converts a connector like the 8P8C (RJ-45) modular connector or 9 pin D-Sub into a terminal block to facilitate wiring.

Modular connector

8P8C8P8C modular connector4P4C
In the automation industry, a terminal adapter is a passive device that converts a connector like the 8P8C (RJ-45) modular connector or 9 pin D-Sub into a terminal block to facilitate wiring.

D-subminiature

DE-9D-SubDE9
In the automation industry, a terminal adapter is a passive device that converts a connector like the 8P8C (RJ-45) modular connector or 9 pin D-Sub into a terminal block to facilitate wiring.