CTI is not configured for the NetSuite user, see User Setup
Script ID's may not be configured
correctly, possibly no script execute permissions, see User
Setup; also
all record types switched off, see Settings
and Preferences
Please see Settings
and Preferences
Time format may not be configured
correctly, see User
Setup
This occurs if you have multiple contacts with the same a number a resolution will be implemented in a future release.
This is a limitation of NetSuite, requires setting: start time!=end time
Please click on this link for the NetSuite guide.