isdnbill(1) on Linux
The text 38e0b1b4e313, as Debian 3.1 (Sarge) shipped it.
report isdn costs
Flags it lists
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-E -
-I -
-Nnnn -
-V -
-a -
-e -
-f -
-i -
-m -
-n -
-o -
-t -
-vn