Microcom Networking Protocols Class 7
Modems Glossary
Modems — Microcom Networking Protocols Class 7
Information on Microcom Networking Protocols Class 7
Microcom Networking Protocols Class 7·is one of the error correction and
data compression protocols developed by the modem manufacturer Microcom.
MNP Class
7 provide ·enhanced data compression protocol that can increase
throughput by up to 300%.
Microcom Networking Protocols Class 7 compression uses
an advanced form of Huffman encoding in conjunction with a
predictive Markhov algorithm to represent user data in the shortest
possible Huffman codes. To encode a character, the compressor selects
a code that depends on the immediately preceding character (for
example, q followed by a u).
This compression technique is called
Enhanced Data Compression, which has all the characteristics of Class
5 compression, but in addition, predicts the probability of repetitive
characters in the data stream.
Class 7 compression, on average, reduces
data by 42%.
In addition to Class 5 and Class 7
data compression, modern implementation of MNP supports the ITU V.42bis
data compression standard.
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