.. _headlabel-refx-data-85:

Data 85 (Registered Cell)
=========================

The current network registration information.

The frame format of the Data **85** unit is as follows:

.. code-block:: none

   For example (Total 16 bytes):
   55 0E 06 04 BC 8A 00 10 00 02 10 00 10 0C 13 03

.. tabularcolumns:: |p{3.2em}|p{12.2em}|p{5.8em}|p{13em}|p{4.8em}|

.. table::
   :width: 100%
   :widths: auto

   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+
   | Parts   | Fields                                     | Length (Byte) | Range/Format                                | Default      |
   +=========+============================================+===============+=============================================+==============+
   | ID      | Data ID                                    | 1             | 55H (85)                                    | 55H (85)     |
   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+
   | Length  | Data Length                                | 1             | 00H or 0EH                                  |              |
   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+
   | Content | `PLMN`                                     | 4             |                                             |              |
   +         +--------------------------------------------+---------------+---------------------------------------------+--------------+
   |         | `LAC`                                      | 2             | 0000H-FFFFH                                 |              |
   +         +--------------------------------------------+---------------+---------------------------------------------+--------------+
   |         | `Cell ID`                                  | 4             | 00000000H-0FFFFFFFH                         |              |
   +         +--------------------------------------------+---------------+---------------------------------------------+--------------+
   |         | `Access Technology & Roaming`              | 1             |                                             |              |
   +         +--------------------------------------------+---------------+---------------------------------------------+--------------+
   |         | `Band`                                     | 1             |                                             |              |
   +         +--------------------------------------------+---------------+---------------------------------------------+--------------+
   |         | `CSQ RSSI`                                 | 1             | 00H-1FH, 63H                                |              |
   +         +--------------------------------------------+---------------+---------------------------------------------+--------------+
   |         | `Bit Error Rate`                           | 1             | 00H-07H, 63H                                |              |
   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+

- `PLMN`

  Public Land Mobile Network, composed by MCC (Mobile Country Code) and MNC (Mobile Network Code).

  The first byte (the highest byte) represents the length of the PLMN, and the next 3 bytes are the hexadecimal expression of the PLMN converted to an integer.

  For example, 0500B3B1H means PLMN "46001", and 0604BC8AH means PLMN "310410".

- `LAC`

  Location Area Code in hexadecimal format.

  For example, 0010H means LAC "0010".

- `Cell ID`

  Cell ID in hexadecimal format.

  For example, 00021000H means Cell ID "00021000".

- `Access Technology & Roaming`

  The upper 1 bit represents roaming status and the lower 7 bits represent access technology.

  - **Roaming** (Bit7)

    - **0b0** - Registered to the home network.

    - **0b1** - Registered to a roaming network.

  - **Access Technology** (Bit6 to Bit0)

    - **0b0000000** - GSM
    - **0b0000001** - UMTS
    - **0b0000101** - LTE Cat-1
    - **0b0010000** - LTE Cat-M1
    - **0b0010010** - LTE Cat-NB2

- `Band`

  If the value of 'Access Technology' is **GSM** or **UMTS**, the meaning of this field is as follows:

  - **00H** - 800MHz

  - **01H** - 850MHz

  - **02H** - 900MHz

  - **03H** - 1800MHz

  - **04H** - 1900MHz

  - **05H** - 2100MHz

  If the value of 'Access Technology' means "LTE X", this field indicates the LTE Band. For example, 05H indicates Band5, 0CH indicates Band12, and 14H indicates Band20.

  **Note:** In particular, FFH means taht the terminal can not obtain the Band value.

- `CSQ RSSI`

  The received signal strength:

  +-----------------------+-------------------------------+
  | CSQ RSSI              | Signal Strength (dBm)         |
  +=======================+===============================+
  | 00H (0)               | -113 or less                  |
  +-----------------------+-------------------------------+
  | 01H (1)               | -111                          |
  +-----------------------+-------------------------------+
  | 02H to 1EH (2 to 30)  | -109 to -53                   |
  +-----------------------+-------------------------------+
  | 1FH (31)              | -51 or greater                |
  +-----------------------+-------------------------------+
  | 63H (99)              | Not known or not detectable   |
  +-----------------------+-------------------------------+

- `Bit Error Rate`

  Channel bit error rate (in percent). In particular, 63H (i.e. 99) means "Not known or not detectable".