Review on Grandstream GXW4108 8-Port FXO Gateway for VoIP Phone & Device by Manjola Abrom

I had a small office to set up a phone system. They have very bad DSL so I wanted to use the FXO gateway to bring in POTS lines. The GrandStream GXW4108 is very complex with tons of different options. It's poorly documented and not easy to set up, but with lots of tutorials and bugs I got it working with a flash PBX. Yes, it can be configured so that calls coming in on selected ports only ring the selected call groups. You can also choose which channel/line each outgoing call uses. It works great, no echo or anything.