ISDN ANALYZER D1080 - messkom.de
ISDN ANALYZER D1080 - messkom.de
ISDN ANALYZER D1080 - messkom.de
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USER’S MANUAL REV. 5 <strong>ISDN</strong> <strong>ANALYZER</strong> <strong>D1080</strong><br />
12.2.1. Test configurations<br />
Several test configurations are available, from 64kb bit rate with<br />
only one B channel to 256kb, using four B channels at the same<br />
time in Primary Access.<br />
There are two types of tests: “User-User” and “User-Network”.<br />
The first type features a connection over the whole net section<br />
between two final users, including the routing between the<br />
networks. The second type tests connections between the user<br />
and the corresponding local network.<br />
If the “User-User” test is repeated several times, different results<br />
can be obtained according to the network routing.<br />
The IfTestKo field can be used to disconnect calls with high error<br />
rates.<br />
If the call is not disconnected, the operator can trace the call in<br />
the networks.<br />
! This field is active only if the duration of the test is<br />
not CONTINUOUS.<br />
By examining the test results, the operator can i<strong>de</strong>ntify the<br />
<strong>de</strong>fective user access.<br />
This access can be controlled by making other measurement<br />
cycles and sampling the BER during a longer period of time.<br />
! If the Iftestko field is used, the instrument stops at<br />
the first failed cycle without disconnecting the call<br />
in progress.<br />
CHAPTER 12. SDN TERMINAL SIMULATOR 145
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