Tainet ITM-3296bis, Руководство пользователя

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4-10 GENERAL INFORMATION AND FEATURES
4.13 Line Status Monitoring
In order to let users manage transmission conditions, the TAINET Network Series
Modem provides a signal quality displayed at right lower corner of the screen. It
ranges from 0 to 9. The following shows the relationship between the displayed
number and bit error rate (BER).
9 -- < 10 ^-9
8 -- < 10 ^-8
7 -- < 10 ^-7
6 -- < 10 ^-6
5 -- < 10 ^-5
4 -- < 10 ^-4
3 -- < 10 ^-3
2 -- < 10 ^-2
1 -- < 10 ^-1
0 -- NO Connect
2. Received signal level Rx level = -25 dBm
5. Far-end frequency shift F F-Shift = 1.7 Hz
Basically, 10^-5 to 10^-6 is the basic required bit error rate. If this condition is not
achievable; leased line users should report to telephone company, however, it is better
for dial line users to try the dial again.
There are some real time line condition information which may help you judge the
line quality:
1. Transmitted signal level Ex: Tx level = -10 dBm
3. Signal to noise ratio S/N Ratio = 35 dB
4. Received frequency shift F-Shift = 0.2 Hz
6. Round trip delay Delay = 560 ms
7. Near-end echo level N Echo = -20 dB
8. Far-end echo level F Echo = -40 dB
9. Terminal mode DTE = 19200 ASY 10
10. Retrain count Retrains = 1
The parameters above can be found in "STATUS" menu. In conjunction with remote
access functions, you may further observe remote status.