Is it possible to use the SPA122 with a UC540 as an ATA (ie, for a fax machine analog telephone)? I know that the UC540 has FXS ports, but some of the phones that we use register back to the UC via a wireless bridge as they are in a seperate building. My customer is looking for a solution to have a fax machine located in this remote building. Would the SPA122 work for this scenario? If not, any ideas as to how i could accomplish this?