ANSI Parameters

The following is a list of the national parameters defined for ANSI networks, the binary value of the parameter identifier, and a brief description of each. Because they are small values, the enumerations for the parameter indicator subfields are shown in decimal value for simplicity.

Time Stamp (00010111)— Defines the time that an event occurred in the form of YY/MM/DD/hh/mm, along with a time delta between local time and Greenwich Mean Time. The time delta provides a reference point for nodes in different time zones so timestamps can be compared meaningfully.

Automatic Code Gap Indicators (10000001)— Sent to control the number of operations being requested. This is typically used in overload situations where a large number of messages are being received for a specific range of number codes. It is sent for the following causes:

• Vacant Code (01)— Calls received for an unassigned number.

• Out of Band (02)— Calls received for a customer who has not subscribed.

• Database Overload (03)— The database is overloaded.

• Destination Mass Calling (04)— An excessive number of calls are being received for a destination.

• Operational Support System Initiated (05)— An OSS has initiated ACG OSS.

Additional fields identifying the duration for applying the control and the interval in seconds between controls are also sent as part of the parameter.

Standard Announcement (10000010)— Indicates one of the standard announcements, which include:

• Out of Band (01)— Customer is not subscribed to this zone or band.

• Vacant Code (02)— Unassigned number.

• Disconnected Number (03)— The called number has been disconnected.

• Reorder (04)— All trunks are busy. Uses the standard 120 IPM tone cadence.

• Busy (05)— The called number is busy. Uses the standard 60 IPM tone cadence.

• No Circuit Available (06)— No circuit is available for reaching the called number.

• Reorder (07)— A Reorder announcement is played instead of a Reorder tone.

• Audible Ring (08)— An indication that the called party is being alerted.

Customized Announcement (10000011)— Used to identify a customized announcement that is not part of the standard announcements. It includes an Announcement Set and an Announcement Identifier, both of which are user-defined.

Digits (10000100)— Used to provide digit information and includes the following information:

• Type of Digits— Identifies the type of digits, such as Called Party, Calling Party, LATA digits, and so forth.

• Nature of Number— Indicates whether digits are National or International and indicates the Presentation Restriction Indicator.

• Encoding— Indicates whether the digits are encoded using a Binary Coded Decimal or IA5 method.

• Numbering Plan— Indicates the numbering plan, such as ISDN or telephony.

• Number of Digits— The number of digits that are included.

• Digits— The actual digit string.

Standard User Error Code (10000101)— Provides the Error Identifier for User Errors. The errors can be:

• Caller Abandon— The caller hangs up before the TCAP transaction is complete.

• Improper Caller Response— The caller provides unexpected input during an operation involving caller interaction, such as when being prompted for digits by a voice menu system.

Problem Data (10000110)— Indicates the data that caused a problem in a TCAP transaction. The problem data element is contained within the parameter.

SCCP Calling Party Address (10000111)— Obsolete parameter that was previously used in a Temporary Handover.

Transaction ID (10001000)— Obsolete parameter that was previously used in a Temporary Handover.

Package Type (10001001)— Obsolete parameter that was previously used in a Temporary Handover.

Service Key (10001010)— The Service Key is an encapsulation parameter that is used for accessing a database record. Its contents consist of additional parameters that are used as the record's key.

Busy/Idle Status (10001011)— Indicates whether a line is busy or idle. The status field is set to one of the following:

• Busy (01)

• Idle (02)

Call Forwarding Status (10001100)— Indicates the availability and status of a line's Call Forwarding feature. The following Call Forwarding variants are indicated within the parameter:

• Selective Forwarding

• Call Forwarding Don't Answer

• Call Forwarding on Busy

• Call Forwarding Variable

Each variant's status is provided as a 2-bit field with one of the following values:

• Service Not Supported (0)

• Active (1)

• Not Active (2)

Originating Restrictions (10001101)— Identifies restrictions on a line's outgoing calls. For example, a business might restrict its employees from making long distance calls to outside parties. The Restrictions Identifier has one of the following values:

• Denied Originating (0)— No originating calls are permitted.

• Fully Restricted Originating (1)— Direct and indirect access to parties outside of a Business Group are blocked.

• Semi-Restricted Originating (2)— Direct access to parties outside of a Business Group are blocked, but the caller can still access outside parties through the attendant, call forwarding, call pick-up, three-way calling, call transfer, and conferencing.

• Unrestricted Originating (3)— No restrictions exist on the calls that might normally be originated.

Terminating Restrictions (10001110)— Identifies any restrictions on a line's incoming calls. An example would be a business that does not allow direct, incoming calls to an employee from outside of the company. The Terminating Restriction Identifier has one of the following values:

• Denied Termination (0)— No calls are permitted to be terminated.

• Fully Restricted Terminating (1)— Direct access from parties outside of a Business Group are blocked.

• Semi-restricted Terminating (2)— Direct access from parties outside of a Business Group are blocked, but calls from an attendant, call forwarded calls, call pick-up, three-way calling, call transfer, and conferencing are.

• Unrestricted Terminating (3)— No restrictions exist on calls that are terminated to the line.

• Call Rejection Applies (4)— An indication that the called party has requested to reject a call.

Directory Number to Line Service Type Mapping (10001111)— Indicates what type of line service type is associated with a Directory Number. The Identifier has one of the following values:

• Individual (0)— Single Party Service in which only one subscriber is associated with the line.

• Coin (1)— A pay station line.

• Multi-line Hunt (2)— Calls coming to a single DN are routed to one of multiple lines in a Hunt Group associated with the DN. This allows one number to be advertised with multiple agents handling calls to that number.

• PBX (3)— A Private Branch Exchange line.

• Choke (4)— A DN to which Network Management constraints are applied.

• Series Completion (5)— Calls to a busy line are routed to another DN in the same office.

• Unassigned DN (6)— The DN is valid, but not assigned or not subscribed to a customer.

• Multi-Party (7)— A line shared by two or more parties.

• Non-Specific (8)— A service type that does not fit into any of the above categories.

• Temporarily Out of Service (9)— A DN that is out of service temporarily.

Duration (10010000)— The Duration parameter provides timing information in the form of hours, minutes, and seconds to allow a service to specify a timer for an operation. For example, if a "Send Notification When Party Free" is issued, the duration indicates the period of time during which the line is monitored to detect an idle line.

Returned Data (10010001)— When a problem occurs with a parameter, this parameter can be used to return the actual data that caused the problem.

Bearer Capability Requested (10010010)— Indicates the Bearer Capabilities that are being requested. Bearer Capabilities describe the attributes of the physical medium that is being used. For example, the Information Transfer Capability category describes whether the information being transferred is speech, 3.1kHz audio, video, and so on. You can request the following bearer capabilities:

• Coding Standard

• Information Transfer Capability

• Transfer Mode

• Information Transfer Rate

• Structure

• Configuration

• Establishment

• Symmetry

• Information Transfer Rate

• Multiplier or Layer Identification

• Bearer Capability Multiplier/Protocol Identification

Bearer Capability Supported (10010011)— Indicates whether a requested Bearer Capability is supported. The Indicator has one of the following values:

• Bearer Capability is not supported (01)

• Bearer Capability is supported (02)

• Not authorized (03)

• Not presently available (04)

• Not implemented (05)

Reference ID (10010100)— Identifies the transaction between the database and an exchange during a service assist.

Business Group Parameter (10010101)— Contains the Multilocation Business Group (MBG) information that is associated with a number parameter. It is used to identify the MBG information that is associated with one of the following types of numbers:

• Calling Party Number

• Called Party Number

• Connected Party Number

• Redirecting Number

• Original Called Party Number

The Business Group Parameter contains the following information:

• Attendant Status— Identifies whether the number belongs to an attendant console.

• Business Group Identifier Type— Identifies whether the service associated with the Business Group is MBG or IWPN (Interworking with Private Networks).

• Line Privileges Information Indicator— Indicates whether the privileges associated with the line are fixed or customer defined.

• Party Selector— Indicates the number to which this Business Group information applies.

• Business Group ID— Identifies the Business Group to which the party belongs.

• Sub-group ID— Used to identify a customer-defined sub-group within the Business Group.

• Line Privileges— Used by the customer to define the line privileges associated with the line that the Party Selector specifies.

Signaling Networks Identifier (10010110)— Contains one or more SS7 Network Identifiers, which consist of the Point Code's Network and Cluster IDs.

Generic Name (10010111)— This parameter contains a name (such as the name displayed on Caller ID systems). It includes the following information:

• Type of Name— Indicates to which number the name belongs (for example, Calling Name or Redirecting Name)

• Availability— Indicates whether the name is available.

• Presentation— Indicates whether the name should be displayed.

Message Waiting Indicator Type (10011000)— A two-digit identifier that provides additional information about waiting messages. The identifier's definition is left up to the service provider and customer.

Look Ahead for Busy Response (10011001)— Indicates whether resources were found during the search for available circuits. Includes the following information:

• Location— Indicates the type of network in which the initiator resides.

• Acknowledgement Type— Indicates whether search and reservation of circuits were accepted.

Circuit Identification Code (10011010)— Contains a Circuit Identification Code (CIC), which is used in ISUP to identify a trunk circuit.

Precedence Identifier (10011011)— This parameter is used to identify service domain and preference information for an MLPP (Multi Level Precedence and Preemption) call. Military or government emergency services use the MLPP domain for prioritizing calls. The Precedence Identifier contains the following information:

• Precedence Level— Indicates the level of precedence.

• Network Identity— The Telephone Country Code, and possibly the Recognized Private Operating Agency (RPOA) or Network ID.

• Service Domain— The number allocated to a national MLPP service.

Call Reference (10011100)— Identifies a particular MLPP call that is independent from the physical circuit and contains the following information:

• Call Identity— An identification number that is assigned to the call.

• Point Code— The SS7 Point Code that is associated with the Call Identity.

Authorization (11011101)— Contains information for the sender's identification and authentication—for example, login ID, password, and so on.

Integrity (11011110)— Contains information that allows the destination SS7 node to determine whether the received message has been modified.

Sequence Number (01011111 00011111)— The Sequence Number is used to identify a particular message in a sequence of messages to verify proper message ordering.

Number of Messages (01011111 00100000)— Indicates the number of messages waiting in a voice mail storage and retrieval system.

Display Text (01011111 00100001)— Text information about messages that are waiting in a voice mail storage and retrieval system.

Key Exchange (01111111 00100010)— Contains information used for exchanging cryptographic keys.