ISUP Mandatory/Optional Parameter Table (ITU White Book)

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PARAMETER FIELD

Message Type

    Access Delivery Information 

    O 
    O 
    O 
    O 
    
    O

Access Transport

    Automatic Congestion Level 

    O

Backward Call Indicators

    Call Diversion Information 

    O 
    
    O

Call History Information

    Call    Reference 

    O 
    
    O 
    O 
    
    O 
    O 
    O 
    O 
    O 
    
    O 
    
    O

Called Party Number

    Calling    Party Number 

    O 
    
    O 
    
    O

Calling Party's Category

    Cause Indicators 

    O 
    
    O 
    
    V 
    O 
    
    V 
    
    V

Circuit Group Supervision Message Type Ind.

    Circuit State Indicator 

    V

CUG Interlock Code

    Connected Number 

    O 
    
    O

Connection Request

    Continuity Indicators 

    F

Echo Control Information

    End    of Optional Parameters 

    O 
    O 
    O 
    O 
    
    O 
    O 
    O 
    O 
    O 
    O 
    O 
    
    
    
    O 
    O 
    
    
    
    
    O 
    O 
    O 
    O 
    O 
    O 
    O 
    
    O 
    O 
  

Event Information

    Facility Indicator 

    F 
    F

Forward Call Indicator

    Generic    Digit 

    O 
    
    O

Generic Notification Ind.

    Generic    Number 

    O 
    
    O 
    
    O 
    
    O 
    
    O

Generic Reference

    Information Indicators 

    F

Information Request Indicators

    Location    Number 

    O

PARAMETER FIELD

Location Number

    Message Compatibility    Information 

    O 
    O 
    O 
    O 
    O

MCID Response Indicator

    MCID Request Indicators 

    O

MLPP Precedence

Nature of Connection Indicators

    Network    Specific Facility 

    O 
    
    O 
    O 
    
    O 
    O 
    O 
    O 
    
    O

Optional Backward Call Indicators

    Optional    Forward Call Indicators 

    O

Original Called Number

    Originating    ISC Point Code 

    O

Parameter Compatibility Information

    Propagation    Delay Counter 

    O

Range and Status

    Redirection    Information 

    O 
    
    O

Redirecting Number

    Redirection Number 

    O 
    O 
    O 
    O 
    
    O

Redirection Number Restr.

    Remote    Operations 

    O 
    
    O 
    O 
    O 
    O 
    
    O

Service Activation

    Signaling Point Code 

    O

Subsequent Number

    Suspend/Resume Indicators 

    F

Transit Network Selection

    Transmission    Medium Requirement 

    F

Transmission Medium Requirement Prime

    Transmission Medium Used 

    O 
    O 
    O 
    O 
    
    O

User Service Information

    User    Service Information Prime 

    O

User-to-User Indicators

    User-to-User    Information 

    *O 
    
    O 
    O 
    O 
    O 
    
    O 
    
    O 
    
    V

F = Mandatory fixed length parameter | V = Mandatory variable length parameter | O = Optional Parameter, fixed or variable length

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ISUP Mandatory/Optional Parameter Table (ITU White Book)

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