rasterisk(8) on Linux
The text 87245e55dc6e, as Debian 4.0 (Etch) shipped it.
All-purpose telephony server.
Flags it lists
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-C -
-G -
-L -
-M -
-R -
-T -
-U -
-V -
-c -
-d -
-f -
-g -
-h -
-i -
-n -
-p -
-q -
-r -
-t -
-v -
-x