Tags types and descriptions

This section provides details of each tag and its attributes.

User-to-user information [USR2USR]

This is a sequence of free-format numbers that are not defined within the SS7 ITU/ANSI system. The maximum number in the sequence is 131, with each number having the range of one byte unassigned (0 – 255). The number can be specified either as decimal or hexadecimal—the latter must be proceeded by 0x. Each number is separated by a comma, for example: 1, 3, 5, 7, 0x2, 0x4, 0x6 .

Called Number [CLDN]

This tag specifies the called number and associated attributes. The maximum number of digits in the number is 24 (ITU/ANSI), and only digits from 0 – 9 are supported. To use this tag, leave the Phone Number and Format fields blank in the MakeCall state table Action. The optional attributes are:

CLDN.NUMBER_TYPE

A numerical value defining the Nature of Address of the call, with the following possible values:

1: Subscriber
3: National
4: International
5: Network Specific

CLDN.NUMBER_PLAN

a numerical value defining the Numbering Plan:

1: ISDN

Calling Number [CLGP]

This tag specifies the calling number. The maximum number of digits in the number is 24 (ITU/ANSI), and only digits from 0 – 9 are supported. The optional attributes are:

CLGP.NUMBER_TYPE

A numerical value defining the Nature of Address of the call, with the following possible values:

1: Subscriber
3: National
4: International
5: Network Specific

CLGP.NUMBER_PLAN

a numerical value defining the Numbering Plan:

1: ISDN

CLGP.SCREEN

Defines the screening indicator for the calling number, with the following possible values:

0: User provided, not verified
1: User provided, verified and passed
2: User provided, verified and failed
3: Network provided

CLGP.PRESENT

Defines the address presentation indicator, with possible values as follows:

0: Presentation allowed
1: Presentation restricted
2: Address not available

Original Number [ORIGIN]

This tag specifies the original number. It has the same specification and optional attributes as Called Number, but has a tag name of ORIGIN.

Redirecting Number [REDIRN]

This tag specifies the redirecting number. It has the same specification and optional attributes as Calling Number, but has a tag name of REDIRN.

Redirecting Information [REDINFO]

This tag specifies the Redirecting Information associated with a call. There is no tag information to be processed but the following attributes are processed:

REDINFO.IND

The redirecting method, with the following possible values:

0: No redirection
1: Call rerouted
2: Call rerouted, all redirection information presentation restricted
3: Call diverted
4: Call diverted, all redirection information presentation restricted
5: Call rerouted, redirection number presentation restricted
6: Call diversion, redirection number presentation restricted

REDINFO.ORIG

Indicates the original diverting reason, with the following possible values:

0: Unknown or not available
1: User busy
2: No reply
3: Unconditional

REDINFO.COUNT

Indicates the number of redirections the call has undergone. The value has a range of 1 – 5.

REDINFO.REASON

Reason for redirecting, with the following possible values:

0: Unknown or not available
1: User busy
2: No reply
3: Unconditional
4: Deflection during alerting
5: Deflection immediate response
6: Mobile subscriber not reachable.

User Teleservices Information [UTI] (ITU Only)

This tag and its attributes define the User Teleservices Information IE. There are three elements in the IE. The first will be present in the tag UTI and the other two in attributes UTI.HLC_1 and UTI.HLC_2 respectively. These tags are passed to Blueworx Voice Response as decimal, however an application can present these numbers as decimal or hexadecimal (a two digit number preceded by 0x).

User Services Information [USI]

This tag and its attributes define the User Services Information IE. There is no value to the tag, but up to five attributes can be defined. Depending on the attribute, one or a series of numbers can be specified. The number in this tag is passed as decimal; however, the application can present these numbers as decimal or hexadecimal. For series of numbers, each number is separated by a comma. The attribute labels are as follows:

USI.OCTET_1: one value
USI.OCTET_2: up to three values
USI.OCTET_3: up to four values
USI.OCTET_4: one value
USI.OCTET_5: one value

Generic Address [GENERICADDR]

This tag specified the Generic Address number and associated attributes. The optional attributes are:

GENERICADDR.ADDR_TYPE

Various values, refer to relevant documentation for ANSI – T1.113 3.20A or ITU – Q.763 326

GENERICADDR.NUMBER_TYPE

A numerical value defining the Nature of Address of the call, with the following possible values:

1: Subscriber
3: National
4: International
5: Network Specific

GENERICADDR.NUMBER_PLAN

a numerical value defining the Numbering Plan:

1: ISDN

GENERICADDR.SCREEN

this attribute defines the Screening indicator for the calling number:

0: User provided, not verified
1: User provided, verified and passed
2: User provided, verified and failed
3: Network provided.

GENERICADDR.PRESENT

This attribute defines the address presentation indicator:

0: Presentation allowed
1: Presentation restricted
2: Address not available

Service Activation Parameter [SERVICEACTIVATION]

This tag is available only during application call termination, and contains the optional IE that is used to pass a switch-specific request, for example, transfer this call on termination. The tag value is a numeric list (up to a maximum of 128 comma separated decimal or hexadecimal numbers) the decode of which is specific to the local switch implementation of supplementary services (if any). There are no attributes defined for this tag.

Jurisdiction Information Parameter [JINFO]

For an SS7 T1 inbound call application, the Jurisdiction Information is presented as the value of Tag JINFO in system variable SV542.

For an outbound SS7 T1 call application, the Jurisdiction Information is set in SV541 through the value of Tag JINFO.

The JINFO tag has a value of xxxxxx (digit string of up to six unpacked IA5 address digits) and has no tag attributes. The assumed format of this optional IAM parameter received from the SS7 network is:

byte    nameOFparam = 0xC4;   /* JURISDICTION_INFO_PARM */
byte    lenOFparam;    /* (in bytes) */
byte    DigitInfo[3];    /* Packed 2 digits per byte */

The DigitInfo array (packed) is mapped to the JINFO Tag value (unpacked).

Party Information Parameter [PINFO]

For an SS7 T1 inbound call application, the Party Information is presented as the two attributes of Tag PINFO (PINFO.CALLING_NAME and PINFO.REDIRECTING_NAME) in system variable SV542. The value of Tag PINFO is set to zero.

For an outbound SS7 T1 call application, the Party Information is set in SV541 through PINFO Tag string attributes PINFO.CALLING_NAME and PINFO.REDIRECTING_NAME.

The PINFO Tag value is unused but should be set by the application to zero. The format of this optional IAM parameter sent to the SS7 network is:

byte  nameOFparam = 0xFC;
     /* PTY_INFO_PARM */
byte  lenOFparam;
     /* Overall length of parameter (in bytes) */
byte  NameInfoType = 0xFE;
     /* Name Information (sub-parameter code) */
byte  NameInfoLength;
     /* Length of sub-parameter (in bytes) */
byte  CallingNameType = 0x01;
     /* Calling Party Name element indicator */
byte  CallingNameLenth;
     /* Length of Calling string (in bytes) */
byte  CallingName[15];
     /* IA5 character string 1 - 15 bytes */
byte  RedirectingNameType = 0x03;
     /* Redirecting Party Name element indicator */
byte  RedirectingNameLength;
     /* Length of Redirecting string (in bytes) */
byte  RedirectingName[15];
     /* IA5 character string 1 - 15 bytes */

The character arrays CallingName and RedirectingName are mapped to the PINFO Tag attributes PINFO.CALLING_NAME and PINFO.REDIRECTING_NAME respectively.

Release Cause Codes [CAUSE]

This tag is available only during call termination, and contains the IE that defines the reason for termination. The value of the tag CAUSE defines the termination reason as a number between 1 and 127. Refer to ss7view – D7 Enablement monitoring tool to interpret these values. The attributes are:

CAUSE.LOCATION

This attribute defines the location field:

0: User
1: Private network serving the local user
2: Public network serving the local user
3: Transit network
4: Public network serving the remote user
5: Private network serving the remote user
7: International network
10: Network beyond internet working point

CAUSE.CODING_STD

This attribute defines the coding standard field, and reflects the meaning of the Cause field:

0: ITU-T standardized coding
1: ISO/IEC standard
2: National standard
3: Standard specific to identified location

CAUSE.DIAGS

A series of numbers, separated by commas, in the range of 0 – 255, to a maximum of 28 numbers

Protocol Type [PROTOCOL]

The PROTOCOL tag defines the signaling protocol—in this case it will always be SS7, with the following attributes:

PROTOCOL.VARIANT: This has the same value as selected in the Environment screen of SS7itty
PROTOCOL.ISUP: This is the ISUP variant.

Note: This tag is generated by D7 Enablement only and has no effect when passed in as a tag from Blueworx Voice Response.

Switching SS7 Default values [ISUPPARM]

The configuration file ISUPParm.cfg contains the SS7 default values. However these values can be cloned and modified into different "named" sets. The tag ISUPPARM allows these different parameter sets to be used with the tag value naming the cloned set. This facility is useful if :

Values need to be changed on a call by call basis but the tags for the value are not available.
A number of tags are being used on a regular basis to justify creating their own set.

For details in creating these cloned sets refer to Configuration files.