User manual

CHAPTER 4: GENERAL INFORMATION AND FEATURES
7. Phase jitter P J = 1 Degree
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.
4.13 B.E.R Test
In addition to the parameters stated in the previous section, the Network
Series Modem also offers bit error rate test without any extra test instruments.
Before using the BER test, you have to build a connection then enter "TEST"
menu, set "BER Test" to be ON, select "Error count". Note that if you want to do this
test with both modems, you need to do the setting described above with both modems.
During test, you may press "
→" or "←" key to send some error codes and observe
whether the other modem received them or not. The number of error bits for each
issue is from 2 to 5. At the beginning of the test, you may press “ENTER” to clear
"Error Count. " Wait a period, you may get B.E.R by dividing error count by total
transmitted bits. There are one test pattern, say 511, you may choose from. The
selection can be done at "BER TEST" under "Test" menu. Note that the settings of
both modems should be consistent.
You may execute this test even no one is at the remote site. It can be done by utilizing
remote digital loopback (RDL) which makes remote modem loopback its received
data. To start it, activate “RDL” in “Test” menu, then execute BER test stated above.
Beware that error codes generated by local modem will be received by itself. Hence,
the error count you get is the sum of that of transmitted and received routes (bilateral).
You may judge whether the modem is good or not by operating local analog loopback
then execute BER test. No matter how long you execute this test, the error count
should be 0.
4.14 Intelligent Dial
There are some data terminal equipment such as multiplexes, controllers, and
synchronous terminals can’t issue “AT” commands to dial. The modem offers you a
very convenient way to dial by means of operating front panel. In addition to ten set
phone number, it provides you a 108/1 auto dial function which dial pre-determined
number when you turn the modem on or when DTR is turned on (off to on transition).
4.15 Front Panel Lock and Password Protect
In order to prevent from the operation of unauthorized persons, we offer you this
function. After you set “Front Lock” under “PROFILE” menu to be “Lock”, even the
front panel keys are still effective, all the operations affecting transmission are not
allowed. You only may observe the setting and monitor the line conditions.
To release the lock, you need to enter a password. The following is the table of panel
keys.
"EXIT" --- X
"ENTER" --- E
"HOME" --- V
"
Æ" --- R
"
Å" --- L
The factory setting is “REEE”, and can be modified by users. Before you change the
password, you need to enter the old one. So don’t forget the password you had entered.
43