0x274E NPDI Message Type

Use this TLV in the NPDI Universal ICB (0x0033) to indicate the message type. Most protocols require that you use the Message Type as the first TLV in the ICB. This TLV can be used in Interworking and Standard environments.
Used in:
NPDI Universal ICB (0x0033)
Request for Service with Data message, Route Control message
Outseize Control message, Channel Released with Data message

Byte | Description
0, 1 | Tag: Message Type TLV (0x274E)
2, 3 | Length: 0x0002
4, 5 | Value [0.2]: Message Type 0x0001 Call Proceeding 0x0002 Connect 0x0003 Connect Acknowledge 0x0004 Progress 0x0005 Setup 0x0006 Setup Acknowledge 0x0007 Resume 0x0008 Resume Acknowledge 0x0009 Resume Reject 0x000A Suspend 0x000B Suspend Acknowledge 0x000C Suspend Reject 0x000D Alerting 0x000E Subsequent Address Message 0x000F Release 0x0010 Release Complete 0x0011 Information Request 0x0012 Information Response 0x0013 Identification Request 0x0014 Identification Response 0x0015 Forward Transfer 0x0016 Exit Message 0x0017 Status 0x0018 Status Enquiry 0x0019 Establish 0x002A Establish Acknowledgment 0x002B Signal 0x002C Signal Acknowledgment 0x002D Disconnect Complete 0x002E Port Control 0x002F Port Control Acknowledgment 0x0030 Common control 0x0031 Common control Acknowledgment 0x0032 Resource Unavailable 0x0033 User Information 0x0034 Segment 0x0035 Congestion Control 0x0036 Information 0x0037 Notify

Tag-Length-Value block. A standardized block that allows data to inserted in a standard way into API messages.
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.
Interworking is a software feature within the Excel platform call control layer that enables protocol conversion by analyzing and converting Network Signaling (NS) Layer 3 information.
Outgoing call setup during real-time call processing on a specific channel.
The point in the Excel platform where a DS0 connects to a network. Also known as a "socket."