0x27D0 Partial Calling Line Identity
(Interworking Only)

Used in:
0x0033 NPDI Universal ICB

Byte | Description
0, 1 | Tag 0x27D0
2, 3 | Length Variable
4 | Value[0] Type of Switch (BCD) Bits 1-4 (tens digit) Bits 5-8 (units digit)
5 | Value[1] PNO Identity (BCD) Bits 1-4 (hundreds digit) Bits 5-8 (tens digit)
6 | Value[2] Bits 1-4 PNO identity (BCD) (units digit) Bits 5-8 Switch Number (BCD) (hundreds digit)
7 | Value[3] Switch Number (BCD) Bits 1-4 (tens digit) Bits 5-7 (units digit)

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.