Hi We have UC540 FXOInstalled PACKAGE IS : spa50x-30x-7-4-6.binCisco IOS Software, UC500 Software (UC500-ADVIPSERVICESK9-M), Version 15.0(1)XA3a, SBTG SpecialPSTN FXO port configuration as below,!voice-port 0/1/0 supervisory disconnect anytone cptone...