Wavecom W51PC, Руководство пользователя

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User Manual W51PC DCOM Interface V1.1 Glossary of Terms
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Glossary of Terms
base16
Scheme used to transmit binary data. The hexadecimal number system
is a base-16 numbering system. It is the numbering system used to con-
dense binary bytes into a compact form for transmitting or analysis of
computer data. It is composed of the numbers 0-9 and the letters A-F.
Each “nibble” (4 bits) of a byte can be represented by one of the 16 di-
gits.
base2
Scheme used to transmit binary data. Every binary bit is represented as a
character of “0” or “1”. The data volume grows by factor 8, i.e. for every
binary byte, a character string of 8 bytes is generated.
base64
Scheme used to transmit binary data. Base64 processes data as 24-bit
groups, mapping this data to four encoded characters. It is sometimes re-
ferred to as 3-to-4 encoding. Each 6 bits of the 24-bit group is used as an
index into a mapping table (the base64 alphabet) to obtain a character for
the encoded data.
base64-mime
Scheme used to transmit binary data. Same principle as base64 with one
little difference, it’s the way how the ends of the encoded strings looks
like. Both techniques use the same character set but base64-mime fol-
lows the specification made for SMTP messages. It aligns the string to 4
characters and fills the unused with the padding character “=”, base64
cuts down the characters to the only needed ones depending on the
number of bits.
DCOM
Distributed Component Object Model (DCOM) is a Microsoft proprietary
technology for software components distributed across several net-
worked computers to communicate with each other. It extends Microsoft's
COM, and provides the communication substrate under Microsoft's
COM+ application server infrastructure. It has been deprecated in favor
of Microsoft .NET.