I used it in my office to run an Avaya Partner Plus PBX phone system with 4 switching lines (paging). I currently have Voip.ms set up with this box and it works great. Setting up ATA isn't easy, but it's not difficult either if you watch a few YouTube videos. The sound quality is very good and better than the AT&T POTS lines in our area. We've been using this box for about 3 months and it works great. Highly recommend this ATA if you are looking for an analog phone adapter.
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