0x2915 NPDI SIP Response Code

The PPL Event Indications now supports this existing TLV within the NPDI Universal ICB (0x0033).

This TLV provides the response code received for any SIP message generated by the CSP.

Used in:
0x0033 NPDI Universal ICB in:
Channel Released with Data message
Release Channel with Data message
PPL Event Indication message
Request for Service with Data message

0x0027 - Allows the CSP to generate an outbound REFER request with the refer target URL filling in the TLV.

0x0027 - Informs the host about the result of the sent REFER request (Success - 2xx or Failure - 4xx-6xx).

0x0028 - Informs the host that sent the REFER request about the status of the reference (Trying, Success, or Failure). The value in the SIP Response Code TLV (0x2915) reports the exact response code.

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.

Session-Initiation Protocol. A signaling protocol used for establishing sessions in an IP network. A session could be a simple, two-way telephone call, or it could be a collaborative multi-media conference session.

See Programmable Protocol Language.

Tag-Length-Value block. A standardized block that allows data to inserted in a standard way into API messages.

See Information Control Block.

A condition that, when met, drives a state machine from one state to another. A condition that drives a Component out of its current state by invoking an associated primitive.

In PPL, a condition that, when met, drives a state machine (PPL Component) from one state to another, by invoking an associated Primitive. In PPL files, an Event is marked by an arrow and text.

A programmable software component that uses PPL state machines that can be modified with the PPL Tool.

Byte	Description
0, 1	Tag 0x2915
2, 3	Length 0x0002
4, 5	Value SIP Response Code (2 Bytes) This TLV, when reported in the PPL Event Indication for Event (0x0027/0x0028), will have any valid SIP Response value. The response code to be interpreted for event 0x0027 is as follows: 202 - Accepted (The REFER request is successful) 405 – Method Not Allowed (REFER request failed) 408 – Request Timed Out (REFER request failed) The response code to be interpreted for event 0x0028 is as follows: 100 – Trying 200 - OK (The reference is successful) 503 - Service Unavailable (The reference failed) 603 - Decline (The reference failed)