chan_dongle CLI commands

chan_dongle provides the following CLI commands:

• dongle cmd <device> <at_command>
  Send <at_command> to the rfcomm port on the device with the specified <device>
• dongle reset <device>
  Send reboot command to modem AT+CFUN=1,1
• dongle stop gracefully <device>
  Stop <device> gracefully. Prevents new incoming and outgoing calls and SMS and outgoing USSD from starting up, but allows calls/SMS/USSD in progress to continue. When all the calls/SMS/USSD have finished, <device> stops
• dongle stop now <device>
  Stop <device> now. Stops <device> immediately, ending any calls/SMS/USSD in progress
• dongle stop when convenient <device>
  Stop <device> when convenient. Waits until <device> has no calls/SMS/USSD in progress, and then it stops <device>. It does not prevent new calls/SMS/USSD from entering the <device>.
• dongle show device settings <device>
  Shows settings for <device>
• dongle show device state <device>
  Shows detailed state for <device>
• dongle show device statistics <device>
  Shows statistics for <device>
• dongle show devices
  Shows summarized state for all devices
• dongle show version
  Show module version
• dongle sms <device> <number> <message>
  Send SMS to <number> with the <message> using <device>
• dongle pdu <device> <pdu>
  Send PDU using <device>
• dongle ussd <device> <ussd>
  Send USSD command <ussd> using <device>
• dongle start <device>
  Start <device> if not removed from before.
• dongle restart gracefully <device>
  Prevents new incoming and outgoing calls and SMS and outgoing USSD from starting up in <device>, but allows calls/SMS/USSD in progress to continue. When call/SMS/USSD has finished, <device> restarts. Restart mean first stop device and second reopen and initialize.
• dongle restart now <device>
  Restarts <device> immediately, ending any calls/SMS/USSD in progress.
• dongle restart when convenient <device>
  Waits until <device> has no calls/SMS/USSD in progress, and then it restarts <device>. It does not prevent new calls/SMS/USSD from entering the <device>.
• dongle remove gracefully <device>
  Prevents new incoming and outgoing calls and SMS and outgoing USSD from starting up in <device>, but allows calls/SMS/USSD in progress to continue. When call/SMS/USSD has finished, <device> stopping and removed from module.
• dongle remove now <device>
  Remove <device> from Asterisk immediately.
• dongle remove when convenient <device>
  Waits until <device> has no calls/SMS/USSD in progress and then remove <device>. It does not prevent new calls/SMS/USSD from entering the <device>.
• dongle reload gracefully
  Reloads the chan_dongle configuration gracefully
• dongle reload now
  Reloads the chan_dongle configuration now
• dongle reload when convenient
  Reloads the chan_dongle configuration when convenient. BUG: complete removed devices from dongle.conf not removed from module after reload. Use disable=yes as workaround.