0x2910 NPDI SIP Route Type

Use this TLV to specify whether or not a SIP message should be sent to the default proxy. The TLV is used only when the host does not specify the proxy address in the Route Control message and the default proxy is desired for a particular call. Absence of this TLV implies that the destination can be reached directly.

Used in:
0x0033 NPDI Universal ICB in:
Route Control message

Byte | Description
0, 1 | Tag 0x2910
2, 3 | Length 0x01
: | Value 0x00 Direct Route Destination can be reached directly. Do not use default proxy. 0x01 Indirect Route Destination cannot be reached directly. Use default proxy if one is configured.

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