Overview 
This page contains the descriptions and specifications of the phase two of the Second Feature Interaction Detection Contest. The two features are Call Transfer and Group Ringing. Please consider all possible interactions between these two features and the phase one features. The submission of the results should adhere to the table templates given in the contest instructions. An updated version of this containing the changes and refinements made during the phase one of the contest can be downloaded here:

• as Postscript File (uncompressed) or gzipped.

Description of New Features
Call Transfer
Call Transfer allows the subscriber to transfer the current call to a 3rd Party. That is, while being in a call the subscriber can put the second party on hold and can setup a call to a 3rd Party. Once the subscriber goes onhook the second party of the first call and the 3rd Party are connected. This is effectively a mid-call call transfer. The feature supports both, the subscriber being the caller or called party in the first call.

The diagrams containing the specification of Call Transfer can be downloaded here:

• Part A: as Encapsulated Postscript, either uncompressed or gzipped
• Part B: as Encapsulated Postscript, either uncompressed or gzipped,
• Part C: as Encapsulated Postscript, either uncompressed or gzipped

The diagram containing the specification for Group Ringing can be downloaded here:

• as Encapsulated Postscript, either uncompressed or gzipped