Tainet ITM-3296bis, Руководство пользователя, Страница: 75 / 131

4-4 GENERAL INFORMATION AND FEATURES
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
CCITT V.42 to provide error correction and V.42bis provides data compression for
up to four times.
Due to the improved throughput, the T-288C provides DTE speed up to 76800 bps for
between data terminal and modem.
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.
(3) Press "
←
" to move to "LOAD" column, then press "ENTER" key to enter
"SELECT SCREEN" selection.
(4) Use the "
←
" and "
→
" keys to move the desired file; then press "ENTER" key
to finish setting. Now you should find a "Has Been Done" message on the screen.
During connecting, the modem automatically recognizes the protocol being used by
the remote modem and set the priority order as V.42bis
→
V.42
→
MNP-5
→
MNP-4
→
NORMAL.
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.
4.7 Configuration Profile Set-Up
The TAINET Network Series Modem have various operating modes. To save your
energy, it provides 10 sets of factory default settings as well as 10 sets of user setup
profile which store data even the power is off. Users may choose the most similar
factory default setting; make some modifications with front panel or by AT
commands from terminal then save the modified setting to a user profile. From then
on, once the modem is turned on, it will use this user profile as default.
Below is the profile setting procedure.
(1) With the main menu (MENU), press " ENTER " key to get " menu SELECT "
screen.
(2) Press "
←
" to move to " PROFILE " column, then press "ENTER" to enter
"PROFILE" menu.