1TR6 |
| "1TR6"
was the term used to describe the D-channel protocol in the nation's ISDN network prior to agreeing
to use the Euro-ISDN standard. The protocol
will no longer be used as of 1st January 2000. |
a/b port |
| The
a/b port is the interface of a telecom exchange
into which you can plug and connect up an analogue terminal to form an extension line.
This extension is thereby connected through the
telephone system to the ISDN- network. |
a/b-converter (Terminal adapter) |
| An
a/b-converter is similar to a telecom
exchange
in that it allows you to connect analogue terminals to the ISDN Network. However an a/b
converter is slightly different in that it
normally has no more than two analogue ports and
less sophisticated features. |
analogue |
| Analogue
is the form by which data is converted into
electric signals and back again with a minimal of
technical work involved. |
analogue terminals |
| We
use the term analogue to describe 'normal'
terminals such as telephones, fax machines and
answering machines that are connected to the
telephone line provider's analogue network.They
can be connected to the ISDN network using either an a/b converter or a telecom
exchange. |
exchange line |
| This
is a variation of the ISDN basic line access and used for
telecommunications exchanges which have direct
access to
the terminals. Direct access allows you to have a
call number block of 0 to 99, which is added onto
the main number and this allows you to dial the
terminals directly. |
call waiting |
| Call
waiting is a service feature of the ISDN network whereby a second
incoming call is signalled to the busy subcriber
either with an audible signal or tone, or a
visual prompt. |
connected line caller ID |
| A
service feature of the ISDN network which makes the
phone number of the person calling appear on the Display of an ISDN telephone. |
basic access |
| An
ISDN basic access is available either as
a multiple-terminal line or exchange line and provides the
subscriber with two B channels and one D
channel on
his line. |
bit |
| Bits
are used to describe an electric state or signal,
ie ON or OFF, or power or no power. Each state is
equal to one bit. |
B channel |
| A
B-channel is like a channel within the ISDN network which is similar
to a normal telephone line except that it can
handle a higher rate of Data transfer (64 Kbps kilobits
per second).
Each basic access includes two of these
channels. |
Bps |
| A
unit of bits per second (Bps) tells you
the speed at which Data transfer is taking place. 1000 bps
= one kilobit per second (Kbps), 1000 Kbps = one
megabit per second (Mbps). An ISDN PC-board is
able to transfer data at 64 Kbps. |
bus |
| This
technical term is used to describe the data
transfer channel. S0-bus is the name given to the
actual lines used within the ISDN network. |
byte |
| A
byte is equal to eight bits and represents the
smallest unit of information to descibe memory or
data size. A byte is often referred to by the
letter 'B'. |
BZT |
| "Bundesamt
für Zulassungen". Every piece of
apparatus used within the public service
telephone network has to be approved by the
German Office for Approvals (BZT). Other
equipment not complying is sold only for export
purposes and use of such equipment within the
network is punishable by law. |
CAPI |
| The
Common ISDN Application Interface is what
is generally used for information
exchange between
ISDN hardware and software. It also sets
out to ensure that telecommunications software
and ISDN PC-boards coming from different
manufacturers are compatible. |
Data transfer / Data transmission |
| Exchange
of data between computers with the aid of a
telephone line, a zero-modem cord, or radio waves,
etc. |
Data compression |
| Data
to be sent is first compressed or reduced in size
so that the transfer process takes less time for
the same amount of data being transferred. |
DECT |
| Digital
European Cordless Telephone is a standard for
cordless phones where data between the hand-held
set and base set is sent digitally. This ensures better
voice reproduction and more safety fom call
interception. |
call-type recognition |
| This
is used to describe the facility within the ISDN network to recognise and
intercept an incoming call to see whether it is a
phone call, fax transmission or a Data transfer call and only accept the
call if the connected apparatus is able to 'read'
the incoming data. This feature would, for
example, prevent an unwanted connection between a
telephone and a fax machine.. |
digital |
| When
the exchange of information is digital, all data
is converted into binary signals, and at the same
time encoded. In order to be able to re-read the
data, you need special apparatus which can decode
this binary data. |
display |
| A
small screen on the telephone which displays
phone numbers, names, menu options,etc. |
D channel |
| The
D-channel part of an ISDN connection is also
referred to as the control channel. It transfers
all information relevant to system control. The
channel is used for such information as passing
on the subscriber number or call charge pulses
(units). |
DSS1 |
| With
Euro-ISDN, a so-called DSS1-Protocol is used instead
of the 1TR6-Protocol. This protocol is
responsible for controlling most of what happens
in the D channel. |
direct-access call |
| You
can programme a direct -access call to dial a
specific terminal, connected to a telecom
exchange
directly. |
standard access |
| This
is a variation of an ISDN-basic access where you are only
allocated one MSN. This is ideal if you use
your line solely for the purpose of transmitting
data. |
terminal |
| This
is used to describe a piece of telecommunications
(information exchange) equipment with which you
access the telephone line it is hooked up to.
Terminals are all telephones ('cord-bound',
cordless, video phone, ISDN phone, mobile phone,
etc.), answering machine and fax machines. A
terminal is either analogue or digital. |
Euro-ISDN |
| 30
Network providers in 24 countries are using this
standard which uses the DSS1-Protocol for the D
channel.
This ensures that ISDN hardware is on the whole
compatible. |
malicious call tracing |
| This
allows you to catch nasty callers by intercepting
and displaying their phone number. Malicious call
tracing is a service option for which you have to
file a special application with your telephone
company. |
call HOLD/ call park (CPK) |
| This
is when you put the caller in a queue in order to
look something up or take another call
simultaneously. |
IAE |
| IAE(ISDN-Anschluß-Einheit)
is used to refer to an ISDN-access socket into
which you can plug an ISDN terminal. ISDN equipment is
connected up to the telephone network via a
"RJ-45 Western plug". |
internal call |
| This
is when when two people call each other within
the same private exchange or office without ever
branching out onto the public telecom network
thus reducing the cost of the call. |
ISDN |
| The
Integrated Services Digital Network is a digital network. Voice signals,
images and other data is transfered extremely
quickly via ISDN and other services such as call-forwarding, splitting, call HOLD, call park and call number
portability are possible with ISDN. |
information exchange (communication) |
| This
is used to describe the exchange of information
via phone, fax, computer or similar equipment. |
splitting |
| This
is a service provided by the ISDN network which allows you
to switch back and forth between two callers when
you need to consult one of them or refer back. |
Multiple Subscriber Number (MSN) |
| A
Multiple Subscriber Number works like a
normal telephone number except that you get an ISDN multiple-terminal line with three MSNs. This
means that each of your terminals will be allocated a
separate number (MSN) making them easier to
access directly. |
multiple-terminal line |
| The
difference between a multiple terminal line and
an exchange line is that the multiple
terminal line does not have to have a telecom
exchange.
This means that ISDN terminals can work directly off the
external S0 bus line. Instead of a Direct-access number block, you are
allocated three MSNs. |
music on hold |
| Telecom exchanges have this facility
whereby music is played whilst a caller is being
held in a queue. |
NT (NTBA) |
| A
Network-Terminator is like a resistor and
situated at the very end of a network or path (as
with a computer network). It is used like a
coupler between the external (incoming) dual
cable line connection and the house-internal
four-cable line. |
Primary rate access (S2M) |
| The
S2M offers 30 information channels and two D
channels which is a lot more than what a basic access provides. S2M is only
possible if it is connected up to with the proper
telecom exchange. Primary rate access is a
good alternative solution for large companies
with an above-average amount of information
exchange. |
protocol |
| A
protocol is a standard that sets out and defines
the sequence of a series of events, eg when
setting up data transmission. |
RJ-45 Western plug |
| An
RJ-45 plug is a special, usually 4-pin plug
connector made of transparent plastic which is
used to connect an ISDN-terminal to an IAE socket. A special tool is
required to fit the plug connector. |
automatic callback on busy |
| This
service provided by the ISDN network allows you to be
called back as soon as the subscriber you were
trying to reach gets off the phone. The ringer on
your telephone signals to you when his line is no
longer busy so that you can then attempt to call
him again. |
call forwarding |
| This
allows you to programme your telephone to forward
all subsequent incoming calls to another number
which means that you can always be reached
wherever you are. |
S0 bus |
| An
SO bus is the name of the line onto which you
connect your ISDN-terminal with the help of an IAE socket. An SO bus is made
up of four wires. |
TAE |
| A
Telekommunikations-Anschluß-Einheit
(telecommunications connecting unit) or TAE
socket allows you to connect up an analogue terminal either to the public
telephone network or with the help of a terminal adapter to the ISDN network. |
telecommunications device |
| This
is used to describe any apparatus used for
telecommunication purposes (information
exchange)
such as telephones, answering machines, fax
machines, telecom exchanges, etc. |
TFE |
| Most
telecom exchanges are installed with an
interface for a door handsfree unit (TFE
port). A TFE allows you to speak to a visitor
waiting at the front door and even allows you to
open the door for him using just your telephone. |
TELECOM exchanges |
| This
is what is used to connect up analogue sets to the ISDN network or for linking up
several telephones on an internal network. |
terminal portability with bus |
| This
feature allows you to disconnect an ISDN telephone whilst you keep
the person you where speaking to 'parked' on the
line. You can then connect up the same phone to
another IAE socket and continue your
conversation without 'losing' the other
subscriber. |
