Wireshark · Display Filter Reference: ISO 8073/X.224 COTP Connection-Oriented Transport Protocol

Field name	Description	Type	Versions
cotp.ack_time	Ack time (ms)	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.atn_extended_checksum	ATN extended checksum	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.atn_extended_checksum.status	ATN extended checksum Status	Unsigned integer (8 bits)	2.4.0 to 4.4.2
cotp.avg_throughput.min_accept_called_calling	Average throughput, minimum acceptable, called-calling (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.avg_throughput.min_accept_calling_called	Average throughput, minimum acceptable, calling-called (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.avg_throughput.targ_called_calling	Average throughput, target value, called-calling (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.avg_throughput.targ_calling_called	Average throughput, target value, calling-called (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.bad_checksum	Bad checksum	Label	2.4.0 to 4.4.2
cotp.cause	Cause	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.checksum	Checksum	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.checksum.status	Checksum Status	Unsigned integer (8 bits)	2.4.0 to 4.4.2
cotp.class	Class	Unsigned integer (8 bits)	1.2.0 to 4.4.2
cotp.connection	Connection %s: 0x%x -> 0x%x	Label	1.12.0 to 4.4.2
cotp.credit	Credit	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.destref	Destination reference	Unsigned integer (16 bits)	1.0.0 to 4.4.2
cotp.disconnect_confirm	Disconnect Confirm(DC): 0x%x -> 0x%x	Label	1.12.0 to 4.4.2
cotp.disconnect_request	Disconnect Request(DR): 0x%x -> 0x%x	Label	1.12.0 to 4.4.2
cotp.dst-tsap	Destination TSAP	Character string	1.0.0 to 4.4.2
cotp.dst-tsap-bytes	Destination TSAP	Byte sequence	1.0.0 to 4.4.2
cotp.eot	Last data unit	Boolean	1.0.0 to 4.4.2
cotp.inactivity_timer	Inactivity timer (ms)	Unsigned integer (32 bits)	2.0.0 to 4.4.2
cotp.li	Length	Unsigned integer (8 bits)	1.0.0 to 4.4.2
cotp.lower_window_edge	Lower window edge	Unsigned integer (32 bits)	2.0.0 to 4.4.2
cotp.max_throughput.min_accept_called_calling	Maximum throughput, minimum acceptable, called-calling (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.max_throughput.min_accept_calling_called	Maximum throughput, minimum acceptable, calling-called (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.max_throughput.targ_called_calling	Maximum throughput, target value, called-calling (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.max_throughput.targ_calling_called	Maximum throughput, target value, calling-called (o/s)	Unsigned integer (24 bits)	2.0.0 to 4.4.2
cotp.multiple_tpdus	Multiple TPDUs in one packet	Label	1.12.0 to 4.4.2
cotp.network_expedited_data	Use of network expedited data	Boolean	2.0.0 to 4.4.2
cotp.next-tpdu-number	Your TPDU number	Unsigned integer (8 bits)	1.0.0 to 4.4.2
cotp.opts.extended_formats	Extended formats	Boolean	1.2.0 to 4.4.2
cotp.opts.no_explicit_flow_control	No explicit flow control	Boolean	1.2.0 to 4.4.2
cotp.parameter_code	Parameter code	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.parameter_length	Parameter length	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.parameter_value	Parameter value	Byte sequence	2.0.0 to 4.4.2
cotp.preferred_maximum_tpdu_size	Preferred maximum TPDU size	Unsigned integer (32 bits)	2.0.0 to 4.4.2
cotp.preferred_maximum_tpdu_size.invalid	Preferred maximum TPDU size: bogus length	Label	2.0.0 to 4.4.2
cotp.reassembled.length	Reassembled COTP length	Unsigned integer (32 bits)	1.4.0 to 4.4.2
cotp.reassembled_in	Reassembled COTP in frame	Frame number	1.0.0 to 4.4.2
cotp.reassignment_time	Reassignment time (secs)	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.reject	Reject(RJ): -> 0x%x	Label	1.12.0 to 4.4.2
cotp.reject_cause	Reject cause	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.res_error_rate.min_accept	Residual error rate, minimum acceptable	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.res_error_rate.target_value	Residual error rate, target value	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.res_error_rate.tdsu	Residual error rate, TSDU size of interest	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.segment	COTP Segment	Frame number	1.0.0 to 4.4.2
cotp.segment.count	Segment count	Unsigned integer (32 bits)	1.6.0 to 4.4.2
cotp.segment.error	Reassembly error	Frame number	1.0.0 to 4.4.2
cotp.segment.multipletails	Multiple tail segments found	Boolean	1.0.0 to 4.4.2
cotp.segment.overlap	Segment overlap	Boolean	1.0.0 to 4.4.2
cotp.segment.overlap.conflict	Conflicting data in segment overlap	Boolean	1.0.0 to 4.4.2
cotp.segment.toolongsegment	Segment too long	Boolean	1.0.0 to 4.4.2
cotp.segment_data	COTP segment data	Byte sequence	2.0.0 to 4.4.2
cotp.segments	COTP Segments	Label	1.0.0 to 4.4.2
cotp.sequence_number	Sequence number	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.src-tsap	Source TSAP	Character string	1.0.0 to 4.4.2
cotp.src-tsap-bytes	Source TSAP	Byte sequence	1.0.0 to 4.4.2
cotp.srcref	Source reference	Unsigned integer (16 bits)	1.0.0 to 4.4.2
cotp.tpdu-number	TPDU number	Unsigned integer (8 bits)	1.0.0 to 4.4.2
cotp.tpdu_size	TPDU size	Unsigned integer (8 bits)	2.0.0 to 4.4.2
cotp.transit_delay.max_accept_called_calling	Transit delay, maximum acceptable, called-calling (ms)	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.transit_delay.max_accept_calling_called	Transit delay, maximum acceptable, calling-called (ms)	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.transit_delay.targ_called_calling	Transit delay, target value, called-calling (ms)	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.transit_delay.targ_calling_called	Transit delay, target value, calling-called (ms)	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.transport_expedited_data_transfer	Transport expedited data transfer	Boolean	2.0.0 to 4.4.2
cotp.type	PDU Type	Unsigned integer (8 bits)	1.0.0 to 4.4.2
cotp.use_16_bit_checksum	16 bit checksum	Boolean	2.0.0 to 4.4.2
cotp.vp_opt_sel_class1_use	Use	Boolean	2.0.0 to 4.4.2
cotp.vp_priority	Priority	Unsigned integer (16 bits)	2.0.0 to 4.4.2
cotp.vp_version_nr	Version	Unsigned integer (8 bits)	2.0.0 to 4.4.2