ELSA LANCOM Business LC-4X00, Manual

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Glossary
ELSA LANCOM Business
149
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VLM – Virtual Loadable Module = This pro-
gram provides an interface between applica-
tions and the Novell network operating
system.
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WAN – Wide area networks based on con-
nections using ISDN devices, for example.
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WORKSTATION – Designation for a single
computer within a network.
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X.75 – Recommendation by the
­
ITU-T for
the secure transfer of data using the HDLC
transfer process in the ISDN
­
B channel.
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XModem – XModem is a
­
transfer protocol
with automatic error recognition and correc-
tion. Data transfer is performed in 128-byte
blocks. If a transfer error is identified, the
faulty block is sent again. XModem is one of
the most commonly used protocols world-
wide. It is supported by many standard termi-
nal programs, but has since been superseded
by more modern high-performance protocols
such as ZModem.
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Y connection – Simultaneous connection to
two different remote stations, each using one
B channel of the same ISDN S
0
connection.