| isup.access_delivery_ind | Access delivery indicator | Boolean |
| isup.address_presentation_restricted_indicator | Address presentation restricted indicator | Unsigned 8-bit integer |
| isup.automatic_congestion_level | Automatic congestion level | Unsigned 8-bit integer |
| isup.backw_call_echo_control_device_indicator | Echo Control Device Indicator | Boolean |
| isup.backw_call_end_to_end_information_indicator | End-to-end information indicator | Boolean |
| isup.backw_call_end_to_end_method_indicator | End-to-end method indicator | Unsigned 16-bit integer |
| isup.backw_call_holding_indicator | Holding indicator | Boolean |
| isup.backw_call_interworking_indicator | Interworking indicator | Boolean |
| isup.backw_call_isdn_access_indicator | ISDN access indicator | Boolean |
| isup.backw_call_isdn_user_part_indicator | ISDN user part indicator | Boolean |
| isup.backw_call_sccp_method_indicator | SCCP method indicator | Unsigned 16-bit integer |
| isup.call_diversion_may_occur_ind | Call diversion may occur indicator | Boolean |
| isup.call_processing_state | Call processing state | Unsigned 8-bit integer |
| isup.call_to_be_diverted_ind | Call to be diverted indicator | Unsigned 8-bit integer |
| isup.call_to_be_offered_ind | Call to be offered indicator | Unsigned 8-bit integer |
| isup.called_party_even_address_signal_digit | Address signal digit | Unsigned 8-bit integer |
| isup.called_party_nature_of_address_indicator | Nature of address indicator | Unsigned 8-bit integer |
| isup.called_party_odd_address_signal_digit | Address signal digit | Unsigned 8-bit integer |
| isup.called_partys_category_indicator | Called party's category indicator | Unsigned 16-bit integer |
| isup.called_partys_status_indicator | Called party's status indicator | Unsigned 16-bit integer |
| isup.calling_party_address_request_indicator | Calling party address request indicator | Boolean |
| isup.calling_party_address_response_indicator | Calling party address response indicator | Unsigned 16-bit integer |
| isup.calling_party_even_address_signal_digit | Address signal digit | Unsigned 8-bit integer |
| isup.calling_party_nature_of_address_indicator | Nature of address indicator | Unsigned 8-bit integer |
| isup.calling_party_odd_address_signal_digit | Address signal digit | Unsigned 8-bit integer |
| isup.calling_partys_category | Calling Party's category | Unsigned 8-bit integer |
| isup.calling_partys_category_request_indicator | Calling party's category request indicator | Boolean |
| isup.calling_partys_category_response_indicator | Calling party's category response indicator | Boolean |
| isup.cgs_message_type | Circuit group supervision message type | Unsigned 8-bit integer |
| isup.charge_indicator | Charge indicator | Unsigned 16-bit integer |
| isup.charge_information_request_indicator | Charge information request indicator | Boolean |
| isup.charge_information_response_indicator | Charge information response indicator | Boolean |
| isup.cic | CIC | Unsigned 16-bit integer |
| isup.clg_call_ind | Closed user group call indicator | Unsigned 8-bit integer |
| isup.conference_acceptance_ind | Conference acceptance indicator | Unsigned 8-bit integer |
| isup.connected_line_identity_request_ind | Connected line identity request indicator | Boolean |
| isup.continuity_check_indicator | Continuity Check Indicator | Unsigned 8-bit integer |
| isup.continuity_indicator | Continuity indicator | Boolean |
| isup.echo_control_device_indicator | Echo Control Device Indicator | Boolean |
| isup.event_ind | Event indicator | Unsigned 8-bit integer |
| isup.event_presentatiation_restr_ind | Event presentation restricted indicator | Boolean |
| isup.extension_ind | Extension indicator | Boolean |
| isup.forw_call_end_to_end_information_indicator | End-to-end information indicator | Boolean |
| isup.forw_call_end_to_end_method_indicator | End-to-end method indicator | Unsigned 16-bit integer |
| isup.forw_call_interworking_indicator | Interworking indicator | Boolean |
| isup.forw_call_isdn_access_indicator | ISDN access indicator | Boolean |
| isup.forw_call_isdn_user_part_indicator | ISDN user part indicator | Boolean |
| isup.forw_call_natnl_inatnl_call_indicator | National/international call indicator | Boolean |
| isup.forw_call_preferences_indicator | ISDN user part preference indicator | Unsigned 16-bit integer |
| isup.forw_call_sccp_method_indicator | SCCP method indicator | Unsigned 16-bit integer |
| isup.hold_provided_indicator | Hold provided indicator | Boolean |
| isup.hw_blocking_state | HW blocking state | Unsigned 8-bit integer |
| isup.inband_information_ind | In-band information indicator | Boolean |
| isup.info_req_holding_indicator | Holding indicator | Boolean |
| isup.inn_indicator | INN indicator | Boolean |
| isup.isdn_odd_even_indicator | Odd/even indicator | Boolean |
| isup.loop_prevention_response_ind | Response indicator | Unsigned 8-bit integer |
| isup.malicious_call_ident_request_indicator | Malicious call identification request indicator (ISUP'88) | Boolean |
| isup.mandatory_variable_parameter_pointer | Pointer to Parameter | Unsigned 8-bit integer |
| isup.map_type | Map Type | Unsigned 8-bit integer |
| isup.message_type | Message Type | Unsigned 8-bit integer |
| isup.mlpp_user | MLPP user indicator | Boolean |
| isup.mtc_blocking_state | Maintenance blocking state | Unsigned 8-bit integer |
| isup.network_identification_plan | Network identification plan | Unsigned 8-bit integer |
| isup.ni_indicator | NI indicator | Boolean |
| isup.numbering_plan_indicator | Numbering plan indicator | Unsigned 8-bit integer |
| isup.optional_parameter_part_pointer | Pointer to optional parameter part | Unsigned 8-bit integer |
| isup.original_redirection_reason | Original redirection reason | Unsigned 16-bit integer |
| isup.parameter_length | Parameter Length | Unsigned 8-bit integer |
| isup.parameter_type | Parameter Type | Unsigned 8-bit integer |
| isup.range_indicator | Range indicator | Unsigned 8-bit integer |
| isup.redirecting_ind | Redirection indicator | Unsigned 16-bit integer |
| isup.redirection_counter | Redirection counter | Unsigned 16-bit integer |
| isup.redirection_reason | Redirection reason | Unsigned 16-bit integer |
| isup.satellite_indicator | Satellite Indicator | Unsigned 8-bit integer |
| isup.screening_indicator | Screening indicator | Unsigned 8-bit integer |
| isup.screening_indicator_enhanced | Screening indicator | Unsigned 8-bit integer |
| isup.simple_segmentation_ind | Simple segmentation indicator | Boolean |
| isup.solicided_indicator | Solicited indicator | Boolean |
| isup.suspend_resume_indicator | Suspend/Resume indicator | Boolean |
| isup.temporary_alternative_routing_ind | Temporary alternative routing indicator | Boolean |
| isup.transmission_medium_requirement | Transmission medium requirement | Unsigned 8-bit integer |
| isup.transmission_medium_requirement_prime | Transmission medium requirement prime | Unsigned 8-bit integer |
| isup.type_of_network_identification | Type of network identification | Unsigned 8-bit integer |