The ATA is a Grandstream 801+ This ATA will have a single telephone port which is sufficient to host for the fax service. The ATA will get its own extension on the telephony server, and outgoing faxes will show the 724 telephone number. The ATA is only a 100MBPS connection, but for faxing, this is sufficient. This will only be used when I need to send a physical fax to another machine.