Glossary - ELSA MicroLink ISDN/PCC-16 User Manual

Appendix: Glossary
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Glossary

1TR6
ASCII
B channel
Basic Rate Interface ISDN terminal connector providing two
Baud
BBS
BIBA
bps
48
1TR6 is a specification by the German Telekom for ISDN terminal devices with
a S interface. This specification defines the
0
mainly in Germany. Most other European countries use the
The American Standard Code for Information Interchange is the most
commonly used international code to represent a 128-character alphabet. It is
also called standard ASCII , unlike extended ASCII , which is an extension of
the code by international special characters and graphic symbols to a set of
256 characters (also called IBM character set ). Standard ASCII can be coded
with a word length of 7 bits (2
word length of 8 bits (2
→ → Data channel
one → → control channel (16,000 bps). The link between the Basic Rate Interface
and the terminal device is the
Baud (abbreviation: Bd) is the unit for the step rate (1 Bd = 1 step per second),
i.e. the frequency of status changes on a transmission channel per second.
Erroneously, the unit Baud is often confused with the transmission rate
measured in → bps. In the case of signals having only two states, as in the
ISDN, the step rate is identical with the transmission rate.
Abbreviation of Bulletin Board System (also called Electronic Mail System). A
BBS is an automatic information system with one or more connections to a
communications network. The users of a BBS usually have the opportunity to
send messages to each other and to use the BBS as a communication forum.
In addition, many BBS's are offering libraries containing software and
information on various themes. The ELSA ONLINE Support BBS, which can be
accessed with the ISDN number +49-241-9177-7800 (Germany, modem access
+49-241-9177-981), was set up as a forum for ELSA customers to exchange
experiences and to ask questions for the ELSA support team. Furthermore,
ELSA ONLINE constantly offers latest product information, application
examples and user software. The latest versions of the ISDN driver software,
for example, are always available in the Support BBS for download.
A Bilingual Basic Rate Interface provides two D channel protocols (the
European DSS1 and the German 1TR6) on the same ISDN line. This allows
older German devices supporting only 1TR6 to be operated at the same
interface as newer devices (
Abbreviation of bits per second. This is the unit to measure the speed of a
data transmission. Unlike the step rate measured in
rate indicates the actual amount of information transferred per second.
7 = 128), whereas extended ASCII requires a
8 = 256).
→ → data channels (64,000 bps each) and
→ → S bus.
0
→ → DSS1).
MicroLink ISDN/PCC-16 Manual © 1997 ELSA GmbH
D channel protocol and is used
→ →
DSS1 protocol.
→ →
→ Baud, the transmission