coM.sat ISDN Basic, Руководство пользователя

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co M .sat
ISDN Basic
created: page: file:
16/01/09 6 coMsat ISDN Basic Manual V2.7.doc
Note Protection Mark according to DIN 34!
Abbreviations
EEPROM
E
lectrical
E
rasable
P
rogrammable
R
ead
o
nly
M
emory:
Memory circuit, which can be deleted by applying an electric
voltage.
I
2
C - Bus
I
nter -
IC Bus
GSM
G
lobal
S
ystem
f
or
M
obile
C
ommunications
UMTS
U
niversal
M
obile
T
elecommunications
S
ystem
SIM
S
ubscriber
I
dentity
M
odule
SMS
S
hort
M
essage
S
ervice
SMSC
S
hort
M
essage
S
ervice
C
entre
ISDN
I
ntegrated
S
ervices
D
igital
N
etwork
TC System Private telecommunications switching system
NT - Mode
N
etwork
T
ermination: in this case, the device is operated as a
network terminal (NT), whereby both the electrical and physical
parameters (Layer 1) are adapted as well as the accepting the
data link service and addressing tasks for layers 2 and 3.
TE - Mode Terminal Equipment: In this case the device is operated at the
TC system like a TE2 device i.e. like an ISDN - compatible
terminal.
P - P Point - to Point: direct communication between two points in a
network with each other. Communication is solely via this
connection. The point-to-point connection is a variant of the
wiring of the S
o
interface, if only one terminal is available.
PMP Point-to-Multipoint, the point to multipoint connection is the other
variant of the configuration for the S
0
bus. In this case several
terminals (max 8) can be connected to the same connection. Of
these 8 devices, 2 can establish a connection at any one time.
S
0
The S
0
interface is an internationally standardised interface for
ISDN installations. This interface is made available by the NTBA
on the line side. On the customer side, the interface is provided
both for the connection of a telecommunications switching
system (
¼ system connection) as well as for the connection of
up to 6 ISDN devices (
¼
multiple device port).
EDSS1 Name of the Euro-ISDN protocol (European D-channel Signalling
System No 1); was introduced with the transition of national
ISDNs to the whole of Europe, whereby a data link protocol was
introduced, which is supported by all the connected states. This
protocol contains the mandatory performance characteristics,
which control the establishment and clearance of a link, as well
as providing several supplements. National network providers
can extend these performance characteristics.