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 />
The instrument can in<strong>de</strong>pen<strong>de</strong>ntly generate and measure two<br />
pseudorandom bit sequences (PRBS) over two different B<br />
channels.<br />
The operator can set the following parameters:<br />
CallType, the call mo<strong>de</strong>:<br />
− OUTGOING: the instrument sends a call to a remote user.<br />
Once connected, it generates its pseudorandom sequence<br />
and measures the received one.<br />
− INCOMING: the instrument waits for a call. As soon as a<br />
compatible call is received, the instrument answers<br />
automatically and starts generating and measuring<br />
according to the set pseudorandom sequence.<br />
In this way each instrument can measure the BER of a<br />
single network section.<br />
− 2 OUTGOING: the instrument sends two separate calls<br />
using two telephone numbers that can be different. For<br />
each link, the instrument start generating and measuring<br />
with an in<strong>de</strong>pen<strong>de</strong>nt pseudorandom sequences.<br />
− 2 INCOMING: the instrument waits for two incoming calls.<br />
If compatible calls are received, the corresponding B<br />
channels are connected to two in<strong>de</strong>pen<strong>de</strong>nt<br />
generating/measuring <strong>de</strong>vices of pseudorandom<br />
sequences. .<br />
Num, the number to call<br />
Sub, the subaddress to call<br />
SES, DM, the thresholds that refer to severely errored<br />
seconds (SES) and to <strong>de</strong>gra<strong>de</strong>d minutes (DM) for the G.821<br />
CHAPTER 12. SDN TERMINAL SIMULATOR 141
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