Test; Intelligent Dial And Redial - Tainet T-288C User Manual

GENERAL INFORMATION AND FEATURES 4-11
4.14 B.E.R Test
In addition to the parameters stated in the previous section, the TAINET 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 three different test patterns, say 511, 2047, and ALT
(alternate), you may choose from. The selection can be done at "TP Type" 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. How to make it? 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.

4.15 Intelligent Dial And Redial

In order to reduce the tediously repetitive dialing, the TAINET Network Series
Modem provides the most convenient intelligent dialing functions. In addition to
correctly detect busy tone, dial tone, and ring back tone, it offers 0 to 255 times re-dial
with the interval of 0 to 255 minutes. You may fill up to 10 telephone numbers. The
modem can automatically dial the next number when a number is not available (busy).
If the next one is not available either, it dials the next following one, When it reaches
the last one, starting over with the first number. These procedure will repeat until it
has tried for the predetermined times.
There are some data terminal equipments 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-
number file, 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.
The setting of the dialing functions is located in "DIAL" menu. "Edit A Number" lets
you edit a phone number. "Redial Delay" determines re-dial interval. "Redial times"
sets the times of re-dial. For the intelligent dialing described previously what you have
to do is to insert a "@" character in front of the phone number.