1.For a device with FXS ports, you can dial ## by using an analog telephone connected to the FXS port 1 after the equipment is powered on.
2.For a device without FXS ports, you can use device IP address obtaining tool called 'Finder' or any network scanner to obtain the IP address.

Configuration

Logging in

Navigate through your web browser to the IP address of the device on the same network where the ATA is connected.

Log into the web GUI. Default Username is "Admin" and the initial password is in a sticker in the bottom of the device for older devices. If the sticker does not list a Password the device will have a default password of "clearly".
Enter the captcha letters and numbers to access. These are case insensitive

Changing the default password

Navigate to Security > Access
Enter the current default password and the new password with its confirmation.
The new password must be from 8 to 16 characters in length, a combination of letters, numbers, and symbols excluding the '&' or the '=' or the '"' symbols.

Network

In the menu Basic > Network you can set the following parameters:

Hostname
IP assignment (Setup): Obtain an IP address automatically or set an static IP.
Set ETH2 as a switching port or redundant port to ETH1
STUN (Keep STUN disabled)

Codecs

Navigate to Basic > System
Under the Codec section move the codecs using the arrows from the Enabled codecs box to the Disabled codecs box so that we just have G.711U/20 picked

Click on the Save button to have this setting applied.

Entering the FreePBX trunk information

The first step to take is to enter the FreePBX information what will be used by each port
Navigate to Basic > SIP

You can change or keep the default value of 5060
Leave the Increments of port number field to its default value. This value is the increment on the SIP port used when assigning a SIP port to each registration.
Enter in the Registrar Server field the IP or FQDN of your FreePBX system.
In the Proxy Server field enter the IP or FQDN of your FreePBX system.
In the Registrar Mode section select 'Per line' from the drop down menu.

Inbound calls sent to FreePBX

In this section we will setup our Gateway to receive calls from the PSTN and send them to FreePBX

On Trunk > Feature page fill in Phone number, and Number sections with the DID or the POTS phone number.
Set Registration to 'Off'.
Set the option Inbound handle as Binding.
Make sure TLS and SRTP are disabled.
Keep the rest of the options on their default values.

Note: You have to do this for every FXO port you would like to use in your deployment. To select a FXO port just use the drop-down menu next to the Number section.

Outbound calls from FreePBX

In this section we will setup our Gateway to send to the PSTN the outbound calls coming from FreePBX

Navigate to Routing > Routing table.
In the routing table enter the following information:

IP X ROUTE FXO 3-4/R

This means that any call coming from the IP side (SIP signaling) will be routed to ports 3 and 4 using the 'round robin' distribution method.
If we remove '/R', the calls will be sent to the ports using the 'hunt' method.
Both of these methods are helpful as the Gateway will route the call to the first available port. If port 3 is busy, the call will be sent to port 4.

Creating the SIP trunk in FreePBX

In FreePBX go to Connectivity > Trunks
Click on Add Trunk (chan_pjsip)
Enter a name for the trunk.
Enter the Outbound Caller ID
Leave the rest of the parameters on their default values

In the PJSIP Settings tab, set the 'Authentication' to 'Both' and 'Registration' to 'None'.
In the SIP Server field enter the IP Address of the gateway.

Outbound calls from FreePBX

Go to Connectivity > Outbound Routes and add an outbound route as follows.
In our example the name of the Outbound route will be ToRWG8 and it is going to use the PJSIP trunk we just created for dialing out to the Gateway.

Adjust your dial patterns according to your needs. In our case we will use the prefix 7 to send calls to the Gateway.

pattern

Note: You can use the following Routing Table example as an alternative to have the gateway remove all calls starting with a leading 9, this means remove the 9 as a prefix.

Inbound calls in FreePBX

For calls coming from the Gateway, create an Inbound Route in Connectivity > Inbound routes making sure that DID number matches the Number and Phone Number entries entered in the Gateway.

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