Information Elements for cc_GetCallInfo( ) and cc_GetSigInfo( )

• Intrusion IE:
• Diversion IE:
• Diversion Validation IE:
• Transit IE:
• Text Display IE:
• Network Specific Indications (NSI) IE:
• Extension Status IE:
• Virtual Call IE:

This appendix lists the information elements (IEs) and ISDN message types in the ISDN software library that support the DPNSS protocol.

The following tables describe the different types of IEs that can be retrieved for DPNSS using the cc_GetCallInfo( ) and cc_GetSigInfo( ) functions.

Intrusion IE:

Field	Description	Field Selection	Definition
1. IE ID	Busy IE ID	BUSY_IE	Busy IE value for the CCEV_PROCEEDING event indicates that the called party is busy

Diversion IE:

Field	Description	Field Selection	Definition
1. IE ID	Diversion IE ID	DIVERSION_IE	1. A DIVERSION_IE value in a CCEV_OFFERED event provides information about "diverted from" party. 2. A DIVERSION_ IE value in a CCEV_PROCEEDING event provides information about "divert to" party.
2. Data	Diversion IE Length	2 + length of Diversion Number	Number of data bytes in this IE
3. Data	Diversion Type	DIVERT_IMMEDIATE	Diverted immediately
		DIVERT_ON_BUSY	Diverted when called party was busy
		DIVERT_NO_REPLY	Diverted when called party did not answer
4. Data	Diversion Location	DIVERT_LOCAL DIVERT_REMOTE	Local diversion Remote diversion
5. Data	Diversion Number	ASCII string	Diverted number

Diversion Validation IE:

Field	Description	Field Selection	Definition
1. IE ID	Diversion Validation IE ID	DIVERSION_VALIDATION_IE	When this IE is part of a CCEV_OFFERED event, it indicates that the diversion number needs to be validated.

Transit IE:

Field	Description	Field Selection	Definition
1. IE ID	Transit IE ID	TRANSIT_IE	This IE is received with a CCEV_TRANSIT event.
2. Data	Transit IE Length	Length of Transit data	Number of data bytes in this IE
3. Data	Transit Data	data	Transit data that needs to be sent to the other transfer party.

Text Display IE:

Field	Description	Field Selection	Definition
1. IE ID	Text Display IE ID	TEXT_DISPLAY_IE	This IE can be part of a CCEV_OFFERED event.
2. Data	Text Display IE Length	1 + length of Text Display string	Number of data bytes for this IE.
3. Data	Text Display Message Type	TEXT_TYPE_NOT_PRESENT	Associated text is of no particular type
		TEXT_TYPE_NAME	Associated text is a name
		TEXT_TYPE_MESSAGE	Associated text is a message
		TEXT_TYPE_REASON	Associated text is a reason
4. Data	Text Display String	ASCII string	Text Display string. The '*' and '#' symbols cannot be used directly; 0x01 and 0x02 values should be substituted respectively

Network Specific Indications (NSI) IE:

Field	Description	Field Selection	Definition
1. IE ID	NSI IE ID	NSI_IE	This IE can be part of any event including the CCEV_NSI event.
2. Data	NSI IE Length	2 + Length of Network Specific Indications (NSI) string	Number of data bytes for this IE
3. Data	NSI Message Type	NSI_EEM NSI_LLM	End-to-end message Link-to-link message
4. Data	NSI String Length	Length of Network Specific Indications (NSI) string	Length of next NSI string
5. Data	NSI String	ASCII string	Network Specific Indications string

NOTE:

NSI IE fields 4 and 5 can be repeated multiple times, as needed.

Extension Status IE:

Field	Description	Field Selection	Definition
1. IE ID	Extension Status IE ID	EXTENSION_STATUS_IE	This IE is used in conjunction with the Virtual Call IE to inquire about the current status of an extension.

Virtual Call IE:

Field	Description	Field Selection	Definition
1. IE ID	Virtual Call IE ID	VIRTUALCALL_IE	This IE, when part of a CCEV_OFFERED event, indicates a virtual call.

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