Dim:
def config_write(lines):

    SER.send ('\r\nPress number to edit item or press esc to stop edit:')

    a = SER.receive(10)
    while (a!=chr(0x1b)):
        a = SER.receive(10)

        if (a==chr(48)):
            SER.send ('\r\nEnter new APN:')
            lines_num=0
            config_write_lines(lines,lines_num)


        if (a==chr(49)):
            SER.send ('\r\nEnter new CAID_1:')
            lines_num=1
            config_write_lines(lines,lines_num)


        if (a==chr(50)):
            SER.send ('\r\nEnter new CAID_2:')
            lines_num=2
            config_write_lines(lines,lines_num)


        if (a==chr(51)):
            SER.send ('\r\nEnter new CAID_3:')
            lines_num=3
            config_write_lines(lines,lines_num)


        if (a==chr(52)):
            SER.send ('\r\nEnter new IP:')
            lines_num=4
            config_write_lines(lines,lines_num)


        if (a==chr(53)):
            SER.send ('\r\nEnter new PORT:')
            lines_num=5
            config_write_lines(lines,lines_num)


        if (a==chr(54)):
            SER.send ('\r\nEnter new LOGIN:')
            lines_num=6
            config_write_lines(lines,lines_num)



        if (a==chr(55)):
            SER.send ('\r\nEnter new PASSWORD:')
            lines_num=7
            config_write_lines(lines,lines_num)



    SER.send ('\r\n\r\n')
    SER.send ('BYE!\r\n')

    return ()