ELSA MicroLink ISDN PCI, Руководство пользователя

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ISDN Connections
ELSA MicroLink ISDN PCI
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ISDN Connections
In choosing a modern ISDN connection, you have opened the door to a broad new selec-
tion of communications options.
You can use a wider range of services than with analog telephone connections, at higher
speeds, and in some cases even simultaneously!
What's more, the assignment of several ISDN subscriber numbers lets you precisely tai-
lor the scope and type of communications services to your requirements.
In this chapter, we would like to provide a few examples for the deployment of various
devices (PC, telephone, fax, answering machine, etc.) on your ISDN connection to achieve
the most convenient solution for your particular requirements.
Even if you don't find your specific application scenario here, combinations of these
examples can provide useful ideas for your applications.
Introduction––What Does ISDN Involve?
This section will introduce the specific characteristics of ISDN as compared to conven-
tional telephone connections in order to illustrate the special capabilities of the ISDN
network. While this description is certainly not complete, it covers a number of the que-
stions most frequently asked by new ISDN users.
What Does ISDN Stand for?
ISDN is an abbreviation for I ntegrated S ervices D igital N etwork. This name already con-
tains some key information about ISDN:
K
It is a digital network.
K
A variety of services are integrated in this network.
K
Note: This is not a network which provides digital services exclusively. Analog ser-
vices such as telephony and fax can also be provided via ISDN.
How Many Lines and Subscriber Numbers are Available in the ISDN?
Generally, normal analog telephone connections involve one line with a single number
(subscriber number). While several communications devices (e.g. a telephone and a fax)
can be connected to a telephone connection, only one device can be used at a time due
to the single line.
An ISDN basic rate interface is generally installed for private users and small businesses.
The differences to an analog telephone connection: This immediately provides two
usable lines, the B channels. An additional line is also available, the D channel, but this
channel is used only for control data, such as dialing information, necessary for the esta-
blishment and administration of the connection to other devices.