NAME

       twinstar - Control the Twinstar feature of a Xorcom Astribank

SYNOPSIS

       twinstar {status|jump|enable-wd|disable-wd|ports}

DESCRIPTION

       twinstar is a tool to control the Twinstar (dual USB port) of a Xorcom Astribank. There is
       a single and mandatory argument which is the command to run. That command operates on all
       the Astribanks connected to the system.

       Technically all the commands are implemented using Dahdi::Xpp::Mpp which in turn uses
       astribank_tool. Thus using thus tool will require root permissions or otherwise read/write
       permissions to the USB device.

       The twinstar may be in watchdog mode, which means that it will jump to the remote host if
       it loses contact with the local host. This can happen if the machine is powered down or
       hangs or even if the xpp drivers are unloaded. Which is why the standard twinstar scripts
       put the Astribanks in twinstar mode on startup and remove it on normal shutdown.

       An Astribank will only jump to the other host (either if asked explicitly or by the
       watchdog) only if there is a different Astribank connected to the other port and running.
       Which is why all of this has no effect on systems that don't need this functionality.

       The command are:

   status
       Shows the current status of all Astribanks. Note that it only shows Astribanks whose
       current active USB port is the one connected to this computer.

       Example output:

        DEVICE          PORT       WATCHDOG        POWER0     POWER1
        usb:001/010     0          on              yes        yes
        usb:001/011     0          on              yes        yes

       For each Astribank on the system that has Twinstar support we get:

       Device
           The address of the device. This is the bus address, e.g. the address you see in lsusb
           / dahdi_hardware.

       Port
           The active USB port on the Astribank. This should be always '0' on the master and
           always 1 on the slave.

       Watchdog
           on if the watchdog is triggered in the Atribank or off otherwise.

       Power0, Power1
           Shows which ports of this Astribank are connected to a USB port of a running computer.
           This only shows whether or not the USB host provides power.

   ports
       Shows the same 'Port' column of the status command.

   jump
       Command all the Astribanks to jump to the other port. This works regardless the watchdog
       mode is enabled or not. But requires that there is power on the other port.

   enable-wd
       Enables watchdog mode.

   disable-wd
       Disables watchdog mode.

FILES

       twinstar mostly uses astribank_tool which in turn mostly uses USB files under /dev/bus/usb
       .