0x294C Refer Spans Channel

Used in:
0x0033 NPDI Universal ICB in:

Byte | Description
0, 1 | Tag 0x294C
2,3 | Length 0x0003
4,5 | Value(0,1) Span Number
6 | Value(2) Channel Number

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.
Range of channels provided by T1 or E1 transmission service. A physical span is a group of channels taking up a single physical wire. A logical span is a group of channels taking up less than a single logical wire, or carried over more than one physical wire.