ISDN ANALYZER D1080 - messkom.de
ISDN ANALYZER D1080 - messkom.de
ISDN ANALYZER D1080 - messkom.de
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<strong>ISDN</strong> <strong>ANALYZER</strong> <strong>D1080</strong> USER’S MANUAL REV. 5<br />
The instrument gives the following information:<br />
68<br />
value of the remote supply voltage from LT<br />
logical state of the D channel<br />
loop request for test from the local network<br />
presence of level 2 and 3 activity over the D channel<br />
In case of tests over the “U” interface, the instrument does not<br />
display the activation state of the INFO1, 2, 3 and 4 physical level,<br />
since they refer to the “S0” interface.<br />
8.2.1. Checking the remote supply voltage from<br />
LT<br />
The instrument uses the same conventions as the S-BUS to<br />
measure the remote supply over the “U” interface (see paragraph<br />
8.3.1). The remote supply is consi<strong>de</strong>red lower than the minimum<br />
value if it is lower than the value set in the Vmin field of the<br />
U-TEST page.<br />
8.2.2. Logical state of the D channel<br />
The “D CHAN” LED’s indicate the presence of data exchange at<br />
logical level 1 and 0 over the D channel.<br />
D CHAN<br />
� � When on, the two green LED’s indicate the<br />
presence of logical level 1.<br />
� � When on, the two red LED’s indicate the<br />
presence of logical level 0.<br />
CHAPTER 8. MONITORING THE PHYSICAL LEVEL
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