Surveillance takes effect immediately after the parameters are set from the serviceprocessor menus.If operating system surveillance is enabled (and system firmware has passed control tothe operating system), and the service processor does not detect any heartbeats fromthe operating system within the surveillance delay period, the service processorassumes the system is hung. The machine is left powered on and the service processorenters standby phase, displaying the operating system surveillance failure code on theoperator panel. If call-out is enabled, the service processor calls to report the failure.Call OutThe service processor can call out when it detects one of the following conditions:v System firmware surveillance failurev Operating system surveillance failure (if supported by the operating system)v Critical environmental failuresv RestartsTo enable the call-out feature, do the following:1. Have a modem connected to serial port 1 or 2.2. Set up the following using the service processor menus or diagnostic service aids:v Enable call out for the serial port where the modem is connected.v Set the serial port line speed.v Enter the modem configuration filename.v Set up site-specific parameters (such as phone numbers for call-in and call-outpolicy).v To call out before restart, set Call-Out before restart to Enabled from theReboot/Restart Policy Setup menu.Note: Some modems, such as IBM 7857-017, are not designed for the paging function.Although they can be used for paging, they return an error message when theydo not get the expected response from another modem. Therefore, even thoughthe paging was successful, the error message causes the service processor toretry, continuing to place pager calls for the number of retries specified in theCall-Out policy Setup Menu. These retries result in redundant pages.210 Service Guide
