armadillo:/var/log#  wwan-force-restart
start force restart ems31
stat: can't stat '/var/log/connection-recover.log': No such file or directory
sh: out of range
Connection 'gsm-ttyCommModem' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/198)
modemmanager             | * Stopping modemmanager ... [ ok ]
ems31-boot               | * Stopping ems31-boot ... * start-stop-daemon: no matching processes found
ems31-boot               | [ ok ]
OK
ems31-boot               | * Starting ems31-boot ... [ ok ]

=======================================================================================-時間が１分ぐらいかかる。
armadillo:/var/log# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
ping: sendto: Network unreachable
armadillo:/var/log# mmcli -m 0
  --------------------------------
  General  |                 path: /org/freedesktop/ModemManager1/Modem/0
           |            device id: fc9aeb2f3205054d1e74f3d3b3056e55e04ef84a
  --------------------------------
  Hardware |         manufacturer: Cinterion
           |                model: EMS31-J
           |    firmware revision: REVISION 04.014
           |            supported: lte
           |              current: lte
           |         equipment id: 358009090358861
  --------------------------------
  System   |               device: ems31
           |               plugin: cinterion-ems31
           |         primary port: ttyCommModem
           |                ports: ttyCommModem (at), ttyMux1 (at)
  --------------------------------
  Numbers  |                  own: 02001024804900
  --------------------------------
  Status   |       unlock retries: sim-pin (3), sim-puk (10)
           |                state: enabled
           |          power state: on
           |          access tech: lte
           |       signal quality: 70% (recent)
  --------------------------------
  Modes    |            supported: allowed: 4g; preferred: none
           |              current: allowed: 4g; preferred: none
  --------------------------------
  Bands    |            supported: eutran-1, eutran-19
  --------------------------------
  IP       |            supported: ipv4, ipv6, ipv4v6
  --------------------------------
  3GPP     |         registration: idle
           | packet service state: detached
  --------------------------------
  3GPP EPS | ue mode of operation: csps-2
  --------------------------------
  SIM      |     primary sim path: /org/freedesktop/ModemManager1/SIM/0
  --------------------------------
  Bearer   |                paths: /org/freedesktop/ModemManager1/Bearer/2
           |                       /org/freedesktop/ModemManager1/Bearer/1
           |                       /org/freedesktop/ModemManager1/Bearer/0
           
=======================================================================================復旧していない。