administrator@SMSGateway:/dev$ ls -la ttyU*
    crw------- 1 root root 188, 0 Nov  5 03:24 ttyUSB0
    crw------- 1 root root 188, 1 Nov  5 03:24 ttyUSB1
    crw------- 1 root root 188, 2 Nov  5 03:24 ttyUSB2
    administrator@SMSGateway:/dev$ ls -la /dev/phone
    crw-rw-rw- 1 root dialout 188, 2 Nov  5 03:26 /dev/phone
    administrator@SMSGateway:/dev$ gammu identify
    Device               : /dev/phone
    Manufacturer         : Huawei
    Model                : E1550 (E1550)
    Firmware             : 11.608.09.00.00
    IMEI                 : XXXXXXXXXXXXXXX
    SIM IMSI             : XXXXXXXXXXXXXXX