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ISDN ANALYZER D1080 - messkom.de

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USER’S MANUAL REV. 5 <strong>ISDN</strong> <strong>ANALYZER</strong> <strong>D1080</strong><br />

11.1.2. Display filters<br />

The display filters can be inserted or exclu<strong>de</strong>d both when the test<br />

is in progress and while analyzing the saved data. They are used<br />

to make data display and analysis easier.<br />

! These filters do not affect message memorization,<br />

but <strong>de</strong>pend on the type of capture filter inserted<br />

during the test.<br />

Visual, to avoid displaying all level 1 and/or level 2 events, if<br />

not significant for the analysis.<br />

− ALL, all events are displayed<br />

− LAYER 1, level 1 events are not displayed<br />

− LAYER 2, level 2 events are not displayed<br />

The selection of the VISUAL filter in the Filter field<br />

enables the following parameters:<br />

Lay, to exclu<strong>de</strong> level 1 and/or level 2 events from<br />

display if not significant for the analysis. It replaces<br />

the old Visual field.<br />

TEI, to select the messages according to the TEI.<br />

is used to display messages having the same<br />

value (=) or a different value („) with respect to the<br />

selected one.<br />

SAPI, to select the messages according to the SAPI.<br />

The following values are available:<br />

− 0, control frame for standard calls<br />

− 1, reserved for Q.931 packet communications<br />

− 16, frames for X.25 calls<br />

CHAPTER 11. ANALYZING THE SIGNALING PROTOCOL 93

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