Model: EAP650 Desktop

I am trying to use the built-in FXS port to register a Movistar Spain SIP line.

The network is configured as follows:

A standalone ONT connected to a MikroTik L009 router.

Internet access is provided via PPPoE on VLAN 6.

Movistar telephony uses VLAN 3 with 802.1p priority = 4.

The SIP server is accessible only through VLAN 3.

The EAP650 Desktop has a management IP address on my LAN (VLAN 10, 192.168.10.0/24 network).

I have correctly configured the SIP settings for the FXS port:

Register: 

Proxy: 10.31.255.134:5070

SIP User: phone number

Authentication ID: phone number

Password: phone number

The EAP generates SIP traffic to 10.31.255.134:5070, but the status remains “offline.”

By capturing the traffic, I have verified that the SIP packets are leaving via the EAP’s management interface (VLAN 10) and not Movistar’s voice VLAN (VLAN 3).

My questions are:

Is there a way to associate the internal SIP/FXS client with a specific VLAN?

Is it possible to configure a separate Voice VLAN for the FXS port?

Does the built-in SIP client always use the EAP’s management VLAN/IP?

Is there an advanced option to select the interface or VLAN used by the VoIP service?

Is there detailed technical documentation on how the FXS port of the EAP650 Desktop works?

I haven’t found any information on these points in the user manual.

Thank you.