I use ATA 187 (firmware ATA187.9-03-0) with cucm 8.0.3.20000-2 for fax. the topo belowPSTN---- T1---- GW ---H323(g711 u-law) T38 -----CUCM ----SIP-t38----ATA 187 ------FAXServer ( Brother 2920).I used fax relay with T38 protocol and fax rate set to...