0x27C5 Source Port

Used in:
0x0033 NPDI Universal ICB in:
Request for Service message
Route Control message

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.

The point in the Excel platform where a DS0 connects to a network. Also known as a "socket."

Byte	Description
0, 1	Tag Source Port (0x27C5)
2, 3	Length Variable
4. . .	Value Variable