Watching ISDN Channels

Watching ISDN B Channels

NOTE

Before establishing a call, you cannot know which ISDN B channel will be used. Therefore, to be sure to capture call data, you must activate traces for all the ISDN channels.

ISDN B channels are used to transmit data frames after an ISDN connection is established. The first few data frames exchanged between local and remote sites correspond to a second connection phase to allow the establishment of the upper layer (for example, the PPP protocol).

1.To activate watching on one ISDN B channel, select that channel in the configuration panel of the SynWatch dialog.

To activate watching on all ISDN channels, select the PRI port related to the adapter (Port #0 or Port #1) in the configuration panel of the Synwatch dialog.

A list of watch modes appears:

Figure B-3. ISDN B Channel Watch Modes

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