数据表 - 当我有14条记录时，为什么我的页面只有一页

I have 14 in records and 10 display, IDK why I have only page 1

this is my request: https://datatables.net/forums/discussion/31967/why-my-datatables-serverside-only-have-1-page

and this is the result of the "ajax_files/all_phone_numbers.php"

{
    "sEcho": 0,
    "iTotalRecords": "14",
    "iTotalDisplayRecords": 10,
    "aaData": [
        [
            "13863202227",
            ""
        ],
        [
            "13864790508",
            ""
        ],
        [
            "13865174009",
            ""
        ],
        [
            "14073308841",
            ""
        ],
        [
            "14073884953",
            ""
        ],
        [
            "14074500122",
            ""
        ],
        [
            "14075625408",
            ""
        ],
        [
            "14076177154",
            ""
        ],
        [
            "14076688983",
            ""
        ],
        [
            "14077068252",
            ""
        ]
    ]
}

EDIT1

this is my all_phone_numbers.php php file and I'm using MSSQL PDO : http://codepad.org/VdqNDQhx