Furuno Felcom 50 Operator's Manual page 82

5. CONFIGURATION FROM PC
Deleting an ISDN Handset
Unplug the ISDN Handset to be deleted and rightclick the same in the
Dedicated Handset list. Clicking Test Handset removes its data, leaving the
Terminal Id and MSN number vacant for another Display Handset.
If necessary, click refresh:
Communication Unit will remember the handset connection data. All handsets
are given a unique name.
Note: A triangle symbol
Handset is missing.
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and repeat clicking Test Handset. The
in the Device Manager appears when a Display