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       xpp_sync - Handle sync selection of Xorcom Astribanks.


       xpp_sync <auto|dahdi|nn>

       xpp_sync [-v]


       On a normal operation one Astribank device provides timing for all the
       other Astribank devices.

       When run without parameters, xpp_sync will display a list of Astribanks
       (xbuses) that are connected and registered as Dahdi spans. The current
       xpp sync master will be marked.

       If you this an Astribank is connected and yet it does not appear on the
       output of xpp_sync, it may be unregistered. Try running
       dahdi_registration .

           Automatically selects the best Astribank for syncing.

           Gets synchronization from the Dahdi sync master.

       nn  Sets XBUS-nn as sync source.

       -v  Also print the numeric xpp sync rank.

       (Parameter name is case-insensitive)

   Example output:
               Setting SYNC
               Current sync: 01
               Best Available Syncers:
                + XBUS-01 (usb-0000:00:10.4-3) [usb:12345678]       [ PRI_TE PRI_NT PRI_TE PRI_NT ]
                  XBUS-00 (usb-0000:00:10.4-2) [usb:QA-01]          [ FXS FXO ]
               WARNING: FXO which is not the syncer cause bad PCM
                        Affected Astribanks are:

       In this example we see that the recommended xpp sync master is XBUS-02
       - it is the first on the list. It is also the actual syncer, as we can
       see from the ’+’ beside it.

       xpp_sync is normally called from the dahdi init.d script.  The
       parameter it is called with defaults to auto, but it is possible to
       override that parameter (e.g: set it to dahdi) through the value of
       XPP_SYNC in /etc/dahdi/init.conf .


           (Deprecated: no longer supported) xpp_sync is essentially a nicer
           interface to /proc/xpp/sync . That file shows the current xpp sync
           master (and in what format you need to write to it to set the


       dahdi_registration(1), dahdi_cfg(1), README.Astribank