This file is indexed.

/usr/share/isdn/rate-lu.dat is in isdnlog-data 1:3.25+dfsg1-3.3ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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V:0.02-Luxemburg [18.01.2000]

U:%.3f LUF

P: 01              P&T Luxembourg
B:1001 # Fixme: ???

Z:1 			Inland 	# Ganzes Land
A:+352
T:W/8-19=0.25/240 	Werktag
T:W/6-8,19-23=0.25/480 	Sparzeit
T:6/6-23=0.25/480 	Samstag
#
# line below works onyl f. isdnlog/rate >= 4.02
# else you have to set all dates/times separatedly
T:*/*=0.25/960 		Sonstige Zeit