Tainet T-336Cx, Руководство пользователя, Страница: 59 / 109

Chapter 4 General Information and Features
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4.6 Error Correction And Data Compression
The TAINET Network Series Modem supports “ Error Correction ” and “ Data
Compression
”
while operating in asynchronous mode. In addition to 100% error
free, it also provides two to four times data compression rate to increase
throughput.
MNP class 4 provides error corrections. MNP class 5 provides data compression
for up to two times. On the other hand, V.42 and V.42bis are the
recommendations from ITU-T V.42 to provide error correction and V.42bis
provides data compression for up to four times.
Due to the improved throughput, the T-336Cx provides DTE speed up to 115200
bps for between data terminal and modem.
During connecting, the modem automatically recognizes the protocol being used
by the remote modem and set the priority order as LAPM with EC
→
LAPM
→
MNP-
5
→
MNP-4
→
NORMAL.
Under these error correction and data compression operations, there should be
some kinds of flow control between modem and data terminal equipment (DTE) to
avoid data loss. the hardware solution to the modem is by controlling RTS and
CTS signals. The software solution is by utilizing X-on and X-off codes.
To find the setting information dealing with error correction and data compression,
you may look up the
“
PROTOCOL
”
menu. In addition,
“
CONFIG DTE
”
menu
gives you the guide to flow control setting.