0x278F Originating Line Information
(Interworking Only)

Used in:
0x0033 NPDI Universal ICB

Byte | Description
0, 1 | Tag 0x278F
2, 3 | Length Variable
4 | Value[0] Number of digits
11 | Value[1] BCD digit pair For the complete listing of values, see the North American Numbering Plan Administrator web site: http://www.nanpa.com/number_resource_info/ani_ii_assignments.html
: | :

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.
See Information Control Block.