0x277F - 0x2783 Display (Interworking Only)

Network Protocol Data Intelligence. Also called “Interworking,” it is a software product that operates within Excel’s Call Control (Layer 4) and Services (Layer 5) call processing layers. NPDI is meant to enhance Excel’s call processing product offering by allowing call processing layers (specifically Layers 4 and 5) to perform advanced analysis, generation, and conversion of Network Signaling (NS) Layer 3 information.

Byte	Description
0, 1	Tag 0x2783 - 0x2788
2, 3	Length Variable
4, 5	Value[0] Display Length No length restriction. Each process sets their own length limit and truncates excess data.
:	Value[1] Display Information (IA5/ASCII characters)