/usr/share/wireshark/radius/dictionary.trapeze is in libwireshark-data 1.8.2-5wheezy18.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | # -*- text -*-
#
#	dictionary.trapeze
#
#	For use with FreeRadius and Trapeze Networks MSS software 1.1
#	or greater.
#
#	For assistance, email support@trapezenetworks.com.
#
#	$Id: dictionary.trapeze 28996 2009-07-07 17:52:03Z wmeier $
#
#
VENDOR		Trapeze				14525
# Attributes for MSS 1.1 and later
BEGIN-VENDOR	Trapeze
ATTRIBUTE	Trapeze-VLAN-Name			1	string
ATTRIBUTE	Trapeze-Mobility-Profile		2	string
ATTRIBUTE	Trapeze-Encryption-Type			3	string
ATTRIBUTE	Trapeze-Time-Of-Day			4	string
# New attributes for MSS 3.0 and later
ATTRIBUTE	Trapeze-SSID				5	string
ATTRIBUTE	Trapeze-End-Date			6	string
ATTRIBUTE	Trapeze-Start-Date			7	string
ATTRIBUTE	Trapeze-URL				8	string
END-VENDOR	Trapeze
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