# Link pre-configuration in the lab⁣⁣⁣⁣⁣

Usually, before going into the field, it is recommended to pre-configure in the lab the Astra Wireless units to verify the link establishment. Therefore, let's take the units to be used for this course out of the package and place them on the table.

{% hint style="warning" %}
NOTE

A minimum set of requirements must be met during devices pre-configuration in the lab:

* Make sure the devices are not directed at each other in order to prevent radio modules damage.
* A minimum transmit output power must be set.
* In case of two devices with external antennas, it is recommended to connect them in the link directly, with RF cables and RF attenuators with attenuation of at least 40 dB for each polarization (installation\deinstallation of the RF attenuators and RF cables should only be performed when the devices are switched off).
* Grids shoud be the same on both Master and Slave units.
  {% endhint %}

#### **Step 1: Connection scheme**  <a href="#linkpreconfigurationinthelab-step1-connectionscheme" id="linkpreconfigurationinthelab-step1-connectionscheme"></a>

The equipment list required for the lab configuration:

1. Outdoor units - 2 pcs.
2. Power supply - 2 pcs.
3. Power cord - 2 pcs.
4. Ethernet cables - 4 pcs.
5. Laptop with Ethernet port available.

We will perform the settings mentioned below for each unit of the link and check if wireless link was established correctly.

Use the following instruction to assemble a test scheme:<br>

1. Connect Gigabit Ethernet port at the ODU to the power supply port labeled as "OUT".
2. Connect Ethernet port at the laptop to the power supply port labeled as "IN".
3. Connect the power cord to power supply and plug it to AC mains.

<figure><img src="/files/Q2VTTEmlDbur2T7Mwi6r" alt=""><figcaption></figcaption></figure>

#### **Step 2: Access to the device** <a href="#linkpreconfigurationinthelab-step2-accesstothedevice" id="linkpreconfigurationinthelab-step2-accesstothedevice"></a>

Let's access each unit to the default IP address 10.10.10.1 with mask 255.255.255.0 via a web browser. Before, make sure the Ethernet port of the Laptop has an IP address assigned from the same subnetwork as the one for the unit (e.g., set 10.10.10.10 with mask 255.255.255.0).

{% hint style="warning" %}
NOTE

We assume that each unit used in this setup has not been configured before and runs with the factory settings.
{% endhint %}

Use any letters or numbers for the initial authentication on each unit, for example:

* Login: login.
* Password: password.

{% hint style="warning" %}
NOTE

We strongly recommend to change your login and password after the first login.
{% endhint %}

After the first login, let's configure a distinctive name for each unit and set a custom login and password. Go to the "Settings" → "General" section and configure:

* Device Name (e.g., Master/Slave).

Go to the "Settings" → "Security" section and configure:

* Login (e.g., admin).
* Password (e.g., admin).

{% hint style="warning" %}
NOTE

At the next login, type "admin" for the Login and Password (if these are the credentials set before) to access the unit in the privileged mode.
{% endhint %}

#### **Step 3: Firmware upgrade** <a href="#linkpreconfigurationinthelab-step3-firmwareupgrade" id="linkpreconfigurationinthelab-step3-firmwareupgrade"></a>

Let's upgrade each unit to the latest stable firmware version. In case the laptop has an access to the Internet, a new software version will be detected automatically, update on both devices.

Otherwise, the manual firmware upgrade process should be performed:

* Download latest release from the ftp server <https://ftp.astrawireless.net/pub/Firmware>.<br>
* In the "Maintenance" section click the "Select file" button and set the path to the downloaded file, or drug it to the specified area.<br>
* File will be uploaded to the device. Changes will take force after reboot.

<figure><img src="/files/taWirfqzKj5O46hcvYwL" alt="" width="563"><figcaption></figcaption></figure>

#### **Step 4: Radio parameters configuration** <a href="#linkpreconfigurationinthelab-step4-radioparametersconfiguration" id="linkpreconfigurationinthelab-step4-radioparametersconfiguration"></a>

Let's configure the minimum needed radio parameters to establish the link.<br>

At the unit named Master at step #2 above, go to the "Settings" → "Radio" section and set this unit with:

* Unit role: one device should be Master, another one -  Slave.
* Link ID and Access key parameters, must be the same on both sides of the link.
* Downlink center frequency use values selected at the Link Planning stage.
* Uplink center frequency: only for the Slave device.
* Power limit: set the minimum value in the range, as currently, we are in the lab, and we don't need high output power.
* Channel width: use value selected at the Link Planning stage.
* Frame length: same on both devices.

The rest of parameters remain with the default values.

<figure><img src="/files/sA7P2naskkIlE5fKkRMv" alt=""><figcaption></figcaption></figure>

#### **Step 5: Check the wireless link status** <a href="#linkpreconfigurationinthelab-step5-checkthewirelesslinkstatus" id="linkpreconfigurationinthelab-step5-checkthewirelesslinkstatus"></a>

Let's apply all settings described above for each unit and go to the "Dashboard" section and check if the device status has changed to "Connected".

<figure><img src="/files/twivnmqqJyynodv9B6JD" alt=""><figcaption></figcaption></figure>


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