Wireshark · Display Filter Reference: Q.931

Field name	Description	Type	Versions
q931.accept_data_flow_control	Accept data with flow control mechanism	Boolean	2.0.0 to 4.4.2
q931.accept_data_net_independent_clock	Accept data with network independent clock	Boolean	2.0.0 to 4.4.2
q931.avaya_display	Avaya Display	Character string	2.0.0 to 4.4.2
q931.bearer_capability.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.bearer_capability.data_bits	Data bits	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.default_packet_size	Default packet size	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.duplex	Duplex	Boolean	2.0.0 to 4.4.2
q931.bearer_capability.intermediate_rate	Intermediate rate	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.mode	Mode	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.modem_type	Modem type	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.packet_window_size	Packet window size	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.parity	Parity	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.rate_multiplier	Rate multiplier	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.stop_bits	Stop bits	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.user_rate	User rate	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.bearer_capability.window_size	Window size	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.call_ref	Call reference value	Byte sequence	1.0.0 to 4.4.2
q931.call_ref_flag	Call reference flag	Boolean	1.0.0 to 4.4.2
q931.call_ref_len	Call reference value length	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.call_state	Call state	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.call_state.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.called_party_number.digits	Called party number digits	Character string	1.0.0 to 4.4.2
q931.calling_party_number.digits	Calling party number digits	Character string	1.0.0 to 4.4.2
q931.cause.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.cause.recommendation	Recommendation	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.cause_call.condition	Condition	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.cause_call.diagnostic	Diagnostic	Byte sequence	2.0.0 to 4.4.2
q931.cause_call.message_type	Message type	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.cause_call.rec_timer	Timer	Character string	2.0.0 to 4.4.2
q931.cause_call.rejection_reason	Rejection reason	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.cause_call.user_specific_diagnostic	User specific diagnostic	Byte sequence	2.0.0 to 4.4.2
q931.cause_location	Cause location	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.cause_value	Cause value	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.channel.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.channel.dchan	D-channel indicator	Boolean	1.0.0 to 4.4.2
q931.channel.element_type	Element type	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.channel.exclusive	Indicated channel	Boolean	1.0.0 to 4.4.2
q931.channel.interface_id	Interface ID	Unsigned integer (32 bits)	2.0.0 to 4.4.2
q931.channel.interface_id_present	Interface identifier present	Boolean	1.0.0 to 4.4.2
q931.channel.interface_type	Interface type	Boolean	1.0.0 to 4.4.2
q931.channel.map	Number/map	Boolean	1.0.0 to 4.4.2
q931.channel.number	Channel number	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.channel.selection	Information channel selection	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.channel.slot_map	Slot map	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.coding_standard	Coding standard	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.congestion_level	Congestion level	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.connected_number.digits	Connected party number digits	Character string	1.0.0 to 4.4.2
q931.cug_index_code	CUG index code	Character string	2.0.0 to 4.4.2
q931.cug_indication	CUG indication	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.cumulative_transit_delay	Cumulative transit delay	Unsigned integer (16 bits)	2.0.0 to 4.4.2
q931.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.date_time	Date/time	Byte sequence	2.0.0 to 4.4.2
q931.date_time.invalid	Date/time: Invalid length	Label	2.0.0 to 4.4.2
q931.disc	Protocol discriminator	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.display_information	Display information	Character string	2.0.0 to 4.4.2
q931.extended_audiovisual_characteristics	Extended audiovisual characteristics identification	Unsigned integer (8 bits)	1.4.0 to 4.4.2
q931.extended_high_layer_characteristics	Extended high layer characteristics identification	Unsigned integer (8 bits)	1.4.0 to 4.4.2
q931.extension.reason	Reason for redirection	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.extension_condition	Condition	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.extension_condition_type	Type	Boolean	2.0.0 to 4.4.2
q931.extension_ind	Extension indicator	Boolean	1.0.0 to 4.4.2
q931.extension_ind_new_status	New status	Unsigned integer (8 bits)	1.10.0 to 4.4.2
q931.extension_ind_preference	Preference	Unsigned integer (8 bits)	1.10.0 to 4.4.2
q931.fast_select	Fast select	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.high_layer_characteristics	High layer characteristics identification	Unsigned integer (8 bits)	1.4.0 to 4.4.2
q931.high_layer_compat.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.incomplete_ie	Incomplete IE in the 1st segment	Label	2.0.0 to 4.4.2
q931.information_element	Information element	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.information_element.unknown	Unknown information element	Label	2.0.0 to 4.4.2
q931.information_element_len	Length	Unsigned integer (16 bits)	2.0.0 to 4.4.2
q931.information_rate.incoming	Incoming information rate	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.information_rate.minimum_incoming	Minimum incoming information rate	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.information_rate.minimum_outgoing	Minimum outgoing information rate	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.information_rate.outgoing	Outgoing information rate	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.information_transfer_capability	Information transfer capability	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.information_transfer_rate	Information transfer rate	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.insufficient_info_element	Insufficient information element	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.interpretation	Interpretation	Unsigned integer (8 bits)	1.4.0 to 4.4.2
q931.invalid_length	Invalid length	Label	2.0.0 to 4.4.2
q931.keypad_facility	Keypad facility	Character string	2.0.0 to 4.4.2
q931.layer_1	Layer 1	Boolean	2.0.0 to 4.4.2
q931.layer_1_in_band_negotiation	Layer 1 in-band negotiation	Boolean	2.0.0 to 4.4.2
q931.layer_ident	Layer identification	Unsigned integer (8 bits)	1.2.0 to 4.4.2
q931.locking_codeset	Locking codeset	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.maintenance_message_type	Maintenance message type	Unsigned integer (8 bits)	1.2.0 to 4.4.2
q931.maximum_end_to_end_transit_delay	Maximum end-to-end transit delay	Unsigned integer (16 bits)	2.0.0 to 4.4.2
q931.message_originator	Message originator	Boolean	2.0.0 to 4.4.2
q931.message_segment	Message segment	Byte sequence	2.0.0 to 4.4.2
q931.message_type	Message type	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.missing_info_element	Missing information element	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.mode_of_operation	mode of operation	Boolean	2.0.0 to 4.4.2
q931.more_data	More data	Label	2.0.0 to 4.4.2
q931.multiple_frame_establishment	Multiple frame establishment	Boolean	2.0.0 to 4.4.2
q931.negotiation_is_done	Negotiation is done	Boolean	2.0.0 to 4.4.2
q931.netid	Network identification	Character string	2.0.0 to 4.4.2
q931.netid.facility_specification	Network-specific facility specification	Byte sequence	2.0.0 to 4.4.2
q931.netid.length	Network identification length	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.netid.plan	Network identification plan	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.netid.type	Type of network identification	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.network_service	Network service	Boolean	2.0.0 to 4.4.2
q931.notification_description	Notification description	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.number_type	Number type	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.numbering_plan	Numbering plan	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.out_band_negotiation	Out-band negotiation	Boolean	2.0.0 to 4.4.2
q931.packet_size.backward_value	Backward value	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.packet_size.forward_value	Forward value	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.party_category	Party category	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.party_subaddr	Subaddress	Byte sequence	2.0.0 to 4.4.2
q931.party_subaddr.odd_even	Odd/even indicator	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.party_subaddr.type	Type of subaddress	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.pl_binary_confirmation	Confirmation	Boolean	2.0.0 to 4.4.2
q931.pl_modulus	Modulus	Boolean	2.0.0 to 4.4.2
q931.pl_request	Request	Boolean	2.0.0 to 4.4.2
q931.pl_window_size.backward_value	Backward value	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.pl_window_size.forward_value	Forward value	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.presentation_ind	Presentation indicator	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.presentation_method_protocol_profile	Presentation method of protocol profile	Unsigned integer (8 bits)	1.4.0 to 4.4.2
q931.progress_indicator.data	Data	Byte sequence	2.0.0 to 4.4.2
q931.progress_indicator.description	Progress description	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.progress_indicator.location	Location	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.protocol_negotiation	Protocol negotiation	Boolean	2.0.0 to 4.4.2
q931.rate_adaption_header	Rate adaption header	Boolean	2.0.0 to 4.4.2
q931.reassembled.length	Reassembled Q.931 length	Unsigned integer (32 bits)	1.4.0 to 4.4.2
q931.reassembled_in	Reassembled Q.931 in frame	Frame number	1.0.0 to 4.4.2
q931.redirecting_number.digits	Redirecting party number digits	Character string	1.0.0 to 4.4.2
q931.repeat_indicator	Repeat indicator	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.requested_end_to_end_transit_delay	Requested end-to-end transit delay	Unsigned integer (16 bits)	2.0.0 to 4.4.2
q931.restart_indicator	Restart indicator	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.reverse_charging_ind	Reverse charging indication	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.screening_ind	Screening indicator	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.segment	Q.931 Segment	Frame number	1.0.0 to 4.4.2
q931.segment.count	Segment count	Unsigned integer (32 bits)	1.6.0 to 4.4.2
q931.segment.error	Defragmentation error	Frame number	1.0.0 to 4.4.2
q931.segment.first	First segment	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.segment.multipletails	Multiple tail fragments found	Boolean	1.0.0 to 4.4.2
q931.segment.not_first	Not first segment	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.segment.overlap	Segment overlap	Boolean	1.0.0 to 4.4.2
q931.segment.overlap.conflict	Conflicting data in fragment overlap	Boolean	1.0.0 to 4.4.2
q931.segment.toolongfragment	Segment too long	Boolean	1.0.0 to 4.4.2
q931.segment_type	Segmented message type	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.segments	Q.931 Segments	Label	1.0.0 to 4.4.2
q931.send_data_flow_control	Send data with flow control mechanism	Boolean	2.0.0 to 4.4.2
q931.send_data_net_independent_clock	Send data with network independent clock	Boolean	2.0.0 to 4.4.2
q931.sending_complete	Sending complete	Label	2.0.0 to 4.4.2
q931.signal	Signal	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.transfer_mode	Transfer mode	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.transit_delay	Transit delay	Unsigned integer (16 bits)	2.0.0 to 4.4.2
q931.uil1	User information layer 1 protocol	Unsigned integer (8 bits)	1.0.0 to 4.4.2
q931.uil2	User information layer 2 protocol	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.uil2_info	User-specified layer 2 protocol information	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.uil3	User information layer 3 protocol	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.uil3_additional	Additional layer 3 protocol information	Unsigned integer (16 bits)	2.0.0 to 4.4.2
q931.user.bytes	User information	Byte sequence	2.0.0 to 4.4.2
q931.user.len	User information	Unsigned integer (32 bits)	2.0.0 to 4.4.2
q931.user.protocol_discriminator	Protocol discriminator	Unsigned integer (8 bits)	2.0.0 to 4.4.2
q931.user.string	User information	Character string	2.0.0 to 4.4.2