0x271A Circuit State
(Interworking Only)

Used in:
0x0033 NPDI Universal ICB

Byte | Description
0, 1 | Tag 0x271A
2, 3 | Length Variable
4 | Value[0] Coding Standard 0x00 CCITT Standardized Coding 0x01 ISO/IEC Standard 0x02 National Standard 0x03 Standard specific to identified location
5, 6 | Value[1] Circuit State 0x0000 IDLE 0x0001 Locally blocked 0x0002 Remotely blocked 0x0003 Locally and remotely blocked 0x0004 Circuit incoming busy 0x0005 Circuit outgoing busy 0x0006 Locally blocked by hardware 0x0007 Remotely blocked by hardware 0x0008 Locally and remotely blocked by hardware All other values are reserved.

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.
Comité Consultatif Internationale de Telephonique et Telegraphique (now ITU)
International Standards Organization
The condition of a component at a given instant. The current "context" of a PPL object, such as Idle, Seizing, Answered. In PPL files, a State is represented by a circle.