Related Documentation
400HD Series IP Phone Release Notes
400HD Series IP Phone Administrator's Manual
420HD IP Phone Quick Guide
Document Revision Record
LTRT
11887
Version 2.2.2. May 2015.
11888
Version 2.2.4. August 2015.
11889
Version 2.2.8. February 2016.
User's Manual
Document Name
Description
10
420HD IP Phone
Document #: LTRT-11889