zttool shows the current status the Digium Zaptel inteface cards plugged to the computer.
It displays values like Current Alarms, SyncSource, Tx/Rx Levels for each Zaptel interface.
ztmonitor(8), asterisk (8).
This manual page was written by Santiago Ruano Rincón <firstname.lastname@example.org> for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.