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       dahdi_registration - Handle registration of Xorcom XPD modules in


       dahdi_registration [-s sortorder] [on|off]


       Without parameters, show all connected XPDs sorted by physical
       connector order.  Each one is show to be unregistered (off), or
       registered to a specific dahdi span (the span number is shown).

       All registerations/deregisterations are sorted by physical connector

       Span registration should generally always succeed. Span unregistration
       may fail if channels from the span are in use by e.g. asterisk. In such
       a case you’ll also see those channels as ’(In use)’ in the output of

       off -- deregisters all XPD’s from dahdi.

       on -- registers all XPD’s to dahdi.

       -s sort_order
           The sort order to use.

       If the option is not used, the sort order is taken from the environment
       variable XBUS_SORT and failing that: the hard-coded default of

       The available sorting orders are documented in Dahdi::Xpp manual.

   Sample Output
       An example of the output of dahdi_registration for some registered

         $ dahdi_registration -s type
         XBUS-01         usb:0000153     usb-0000:00:10.4-2
                 XBUS-01/XPD-00: on Span 1
                 XBUS-01/XPD-01: on Span 2
         XBUS-00         usb:0000157     usb-0000:00:10.4-4
                 XBUS-00/XPD-00: on Span 3
                 XBUS-00/XPD-01: on Span 4
                 XBUS-00/XPD-02: on Span 5
                 XBUS-00/XPD-03: on Span 6
                 XBUS-00/XPD-04: on Span 7
                 XBUS-00/XPD-05: on Span 8
                 XBUS-00/XPD-06: on Span 9
                 XBUS-00/XPD-07: on Span 10
         XBUS-02                 usb-0000:00:10.4-1
                 XBUS-02/XPD-00: on Span 11
                 XBUS-02/XPD-10: on Span 12
         # Sorted: type


           Reading from this file shows if if the if the specific XPD is
           registered. Writing to it 0 or 1 registers / unregisters the

           This should allow you to register / unregister a specific XPD
           rather than all of them.