0x27DC Remote H.323 ID

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

Byte | Description
0, 1 | Tag Remote H.323 ID (0x27DC)
2, 3 | Length Variable
4. . . | Value Variable

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.
ITU-T standard defines a set of call control, channel setup, and codec specifications for transmitting real-time voice and video over networks that do not offer guaranteed service or quality of service.