Appendix C: A Brief ISDN Glossary
200
ISDN PC Card – 17 Appendix C: A Brief ISDN Glossary
•
CAPI 2.0 is the current CAPI specification for
Euro-ISDN.
The I BM I nternational I SDN PC Card is fully CAPI
2.0-compliant.
cFos
CAPI Fossil driver. This driver package emulates
an analog modem over a CAPI-compliant ISDN
adapter. Many communications applications to-
day still expect to talk to an analog modem
through a COM port. cFos gives such software the
impression of talking to an analog modem, even
though the underlying hardware is in fact an ISDN
adapter. cFos only works with CAPI-compliant de-
vices such as the IBM International ISDN PC Card.
Cold insertion
/ removal
Denotes the installation or removal of a peripher-
al device when the computer system is powered
off and/or disconnected from the wall sockets.
D channel
The second type of channel in ISDN BRI line. It
carries 16 kbit/s and is mainly limited to signaling
functions to control the B channels.
D-channel
switching
protocol
Describes the telephone company’s particular im-
plementation of ISDN. The switching protocol is
one of the key elements that determines whether
a given ISDN adapter can be used in a given coun-
try. D channel switching protocols in use include:
•
DSS1: Digital Subscriber System No. 1, com-
monly used in Europe where it is also called
E-DSS1 or Euro ISDN
•
NI -1: National ISDN 1, used in the USA and
Canada
•
5ESS: AT&T switching protocol, used in the
USA and Canada
•
G3 PBX Custom: AT&T switching protocol,
used in the USA and Canada
•
DMS-100 Custom: Nortel protocol, used in
the USA and Canada
•
NTT INS Net 64: NTT Docomo, used in Japan
•
TPH 1962: obsolete D-channel switching
protocol used in Australia; replaced by DSS1
Glossary
