Need help with the Grandstream GXW-4108 FXO gateway

[arielgrin]

I used to have a GXW-4104 working correctly with FreePBX.

These posts might be helpful for you, I used them to configure mine:

HOW TO: Grandstream GXW-4104 setup

This ended up taking me a few more hours than it should have due to the lack of a decent guide ANYWHERE. I thought I’d spare the next person the same problem. In FreePBX create a new SIP Trunk. (You could create one and round robin the numbers, but because I want to be able to send each line to a different spot, I setup four trunks, 6000, 6001, 6002, 6003) In this guide, if I don’t mention something, don’t touch the setting. Trunk Name: NXXNXXXXX (Your phone number eg. 8885551212) Outbound C…

http://wiki.freepbx.org/display/FOP/Configuring+a+Grandstream+GXW-410X+Device+to+act+as+an+FXO+Gateway

http://blog.hardmax.com.pe/2008/10/30/configuracion-grandstream-gxw4104-en-freepbx/