Lucent Technologies 555-230-220 User Manual

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Event Reporting and U-Abort Capabilities
3-26
Issue  7 May 1998 
the physical extension from which the call was made. For calls originating from a 
bridged call appearance, this is the number of the primary extension on the phone 
where the call originated.
user to user information
[optional] This parameter is not included.
cause
[optional] This parameter is not included.