SIP Notifications of Options

The SIP method, OPTIONS, allows a User Agent (UA) to query another UA or a proxy regarding its capabilities. This feature allows a client to discover information about the supported methods, extension content types with or without a dialog being established.

When the CSP receives an OPTIONS message, it is reported to the host as a PPL Event Indication including the Request URI in the message.

PPL Event (0x002F) in SIP Component 0x00A7 reports the received OPTIONS message.

To enable this feature, set bit 8 of the PPL Event Notification Mask TLV (0x0282) in the VoIP Protocol Configure (0x00EE) message.

To configure and query the SIP stack for this feature, view the Configure SIP Advanced screen, Call Progress Notification, and select Options message recvd.

Used in:
0x0033 NPDI Universal ICB in:
Route Control message
Request for Service with Data message

Used in:
0x0033 NPDI Universal ICB in:
Request for Service with Data message
Route Control message
Outseize Control message

Important! All TLVs except the port number TLV ends with a NULL terminator, therefore the actual data supported is one less than the maximum length supported for the TLVs. Also note that the CSP nacks all SIP requests of a size greater that 1500 bytes with the 513 message, Too Large

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.

Setting up, monitoring, and tearing down calls.

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.

See Converged Services Administrator.

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

Voice over Internet Protocol. The delivery of voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public-switched telephone network (PSTN).

American Standard Code for Information Interchange

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.

A computer, attached to the Excel platform through an RS-232 or Ethernet link, from which you run the telecommunications application that controls the Excel platform.

The point in the Excel platform where a DS0 connects to a network. Also known as a "socket."

Byte	Description
0, 1	Tag 0x0282
2, 3	Length 0x0004
4-7	Value[0-3] 32 bit mask with each bit selects specific PPL Event Indication. Bit 8 - Options message received.

Byte	Description
0, 1	Tag 0x2946
2, 3	Length Variable (maximum 20 bytes)
4-n	Value[0-n] Null-terminated ASCII string

Byte	Description
0, 1	Tag 0x2947
2, 3	Length Variable (maximum of 650 bytes)
4-n	Value[0-n] Null-terminated ASCII string

Byte	Description
0, 1	Tag 0x2954
2, 3	Length Variable (maximum of 40 bytes)
4-n	Value[0-n] Null Terminated ASCII for user name in Request URI.

Byte	Description
0, 1	Tag 0x2955
2, 3	Length Variable (maximum of 80 bytes)
4-n	Value[0-n] Null Terminated ASCII for host name in Request URI.

Byte	Description
0, 1	Tag 0x2956
2, 3	Length 0x0004
4	Data[0] MSB Port in Request URI Data[1] : Data[2] : Data[3] LSB Port in Request URI