On Mon, February 26, 2018 9:16 am, Francesco Facco de Lagarda wrote:

> Goodmorning to you all!

> 

> I am trying to configure a HT503 as a FXO gateway to my freeswitch 1.6

On the Grandstream configuration web page, take a look at the Basic tab at the top.

At the bottom the Basic page there is a section:

' Unconditional Call Forward to VOIP:

The '503 will initiate a call to the extension number you specify in 'User ID'

when the FXO rings.

Hope this helps.

-kim