gsm0710muxd(8) on Linux
The text e46399dc42fd, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
a gsm 07.10 muxer
Flags it lists
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-B -
-P -
-a -
-b -
-d -
-f -
-h -
-l -
-m -
-p -
-t -
-v -
-x